e -XML/Java/SOAP 2001/03/16 957-2085-11-5 ISBN957-2085-11-5 Growbal

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Arthur

From: Arthur Tseng

Sent: Tuesday, August 01, 2000 6:57 PM

Subject:

Dear growbal:

Linuxer Linux Linux Emily

4

1 ......................................................................................................................................7

1.1 XML.............................................................................................................................7 1.2 XML ....................................................................................................9 1.3 Java XML..............................................................................................................13 1.4 ................................................................................................................15

2 XML .................................................................................................................18 2.1 XML .................................................................................................18 2.2 ........................................................................................................21 2.3 ............................................................................................................27 2.4 Namespaces................................................................................................................33 2.5 XPath..........................................................................................................................35 2.6 ........................................................................................................................46 2.7 XLink XPointer.....................................................................................................67

3 XML Parsers ..........................................................................................................70 3.1 ............................................................................................................70 3.2 DOM SAX ...........................................................................71 3.3 AELfred XML Parser.................................................................................................75 3.4 Apache Xerces XML Parser.......................................................................................89 3.5 Sun JAXPJava API for XML parsing ..............................................................103

4 Java/XML ................................................................................................................ 115 4.1 Java/XML .............................................................................. 115 4.2 Client side Java XML ........................................................................120 4.3 Server side Java XML ........................................................................151 4.4 XSLT XPath ...............................................................................................189 4.5 XML-RPCRemote Procedure Call...........................................................209 4.6 SOAPSimple Object Access Protocol......................................................232

5 ......................................................................................................266 5.1 e-CommerceEDIEAI ..........................................................266 5.2 ..........................................................................................................268 5.3 ..................................................................................................270 5.4 JDBC .......................................................................................................276 5.5 B2B2C .................................................................................278 5.6 B2C ........................................................................................................279 5.7 Web Service ...........................................................................................318 5.8 B2B ........................................................................................................368 5.9 ..........................................................................................................................386 5.10 SOAP service ..........................................................................................387 5.11 ..........................................................................................................388

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5.12 ..........................................................................................................392 5.13 ..................................................................................................................398

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43

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44

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45

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46

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48

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61

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67

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69

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3.3 AELfred XML Parser lfred XML Parser

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75

| +---com.microstar.xml.XmlParser XmlParser XML XmlHandler XmlHandler handler = new MyHandler(); XmlParser parser = new XmlParser(); parser.setHandler(handler); parser.parse("http://www.host.com/doc.xml", null); XmlParser XmlHandler XmlParser XML XmlHandler XmlHandler class handler XmlParser parser parser.setHandlerhandler parser handler XML parser.parseXML ......; lfred com.microstar.xml.XmlHandler interfaceimplementclass import com.microstar.xml.XmlHandler; // XmlHandler MyHandler public class MyHandler implements XmlHandler { public void attribute (String attrName, String attrValue, Boolean isSpecified) { // (method) } public void charData(char ch[], int start, int length) { // (method) } public void doctypeDecl (String name, string publicId, String systemId) { // (method) }

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public void endDocument() { // (method) } public void endElement(String name) { // (method) } public void endExternalEntity(String systemId) { // (method) } public void error(String message, String systemId, int line, int column) { // (method) } public void ignorableWhitespace(char[], int, int) { // (method) } public void processingInstruction(String target, String data) { // (method) } public void resolveEntity(String publicId, String systemId) { // (method) } public void startDocument() { // (method) } public void startElement(String name) { // (method) } public void startExternalEntity(String systemId) { // (method) } }

77

XmlHandler XmlHandler method XmlHander HandlerBase HandlerBase Java java.lang.Object | +----com.microstar.xml.HandlerBase HandlerBase XmlHandler XmlHandler method HandlerBase XmlHandler method method method method HandlerBase method MyHandler HandlerBase method charData()startElement() endElement() XML import com.microstar.xml.HandlerBase; public class MyHandler extends HandlerBase { // method public void startElement(String name) { // (method) System.out.println("" + name); } public void endElement(String name) { // (method) System.out.println("------------"); } public void charData (char s[], int startPos, int length) { System.out.println(": " + new String (s, startPos, length)); } } lfred com.microstar.xml.XmlException XmlException java.lang.Object | +---java.lang.Throwable | +---java.lang.Exception

78

| +---com.microstar.xml.XmlException XmlException

String message String systemIdXML int lineXML int columnXML

XmlHandler error() XmlException HandlerBase error() public void error(String message, String systemId, int line, int column) throws XmlException, Exception Handler error() XmlException try...catch... XmlException import com.microstar.xml.HandlerBase; public class MyHandler extends HandlerBase { public void charData (char s[], int startPos, int length) { System.out.println("Data: " + new String (s, startPos, length)); } // HandlerBase error() public void error (String message, String systemId, int line, int column) throws XmlException, Exception { System.out.println("XML : " + new String (message) ); } } lfred SAX lfred SAX version 1 SAX com.microstar.xml.SAXDriver lfred SAX version 1 methods XML SAXDriver lfred native

79

lfred SAX lfred lfred SAX lfred lfred API SAX API SAX version 1 SAX version 2 SAX1 package

org.xml.sax org.xml.sax.helpers

SAX SAX SAX lfred SAX parser lfred import com.microstar.xml.SAXDriver; org.xml.sax.Parser parser = new com.microstar.xml.SAXDriver(); SAX API XML parser.parse(xmluri); import org.xml.sax.Parser; import com.microstar.xml.SAXDriver public class MySAXParser() { pulic void startParse(String xmluri) { try { // SAX org.xml.sax.Parser parser= new com.microstar.xml.SAXDriver(); // XML parser.parse(xmluri); } catch (Exception e) { System.out.println(":"+ e.getMessage()); }

80

} } SAX SAX Event HandlerSAX version 1 interface

DTDHandler DocumentHandler EntityHandler ErrorHandler

DocumentHandler import org.xml.sax.DocumentHandler; import org.xml.sax.Attributes; import org.xml.sax.Locator; import org.xml.sax.InputSource; import org.xml.sax.Parser; class MyDocumentHandler implements DocumentHandler { public void characters(char ch[], int start, int length) { // } public void startDocument() { // } public void endDocument() { // } public void startElement(String name, AttributeList atts) { // } public void endElement(String name) { // } public void ignorableWhitespace(char ch[], int start, int length) { // } public void processingInstruction(String target, String data) { // PI

81

} public void setDocumentLocator(Locator locator) { // Locator } } ErrorHandler method XML1.0

fetal error XML well-formedness SAX error XML DTD non-validXML SAX

XML warning SAX XML

import org.xml.sax.ErrorHandler; import org.xml.sax.SAXParseException; import java.io.IOException; class MyErrorHandler implements ErrorHandler { public void error(SAXParseException e) throws SAXException { // method } public void fatalError(SAXParseException e) throws SAXException { // method } public void warning(SAXParseException e) throws SAXException { // method } } SAX1 DTD org.xml.sax.DTDHandler method

notationDecl unparsedEntityDecl

method DTD NOTATION ENTITYENTITIES XML DTDHandler

82

import org.xml.sax.DTDHandler; import org.xml.sax.SAXParseException; class MyDTDHandler implements DTDHandler { public void notationDecl(String name, String publicId, String systemId) throws SAXException { // mehtod } public abstract void unparsedEntityDecl(String name, String publicId, String systemId, String notationName) throws SAXException { // mehtod } } DocumentHandler method method SAX org.xml.sax.HandlerBase public class HandlerBase extends Object implements EntityResolver, DTDHandler, DocumentHandler, ErrorHandler method SAX MySAXDemo1.java // packages import java.io.FileReader; import java.lang.*; import org.xml.sax.Parser; import org.xml.sax.AttributeList; import org.xml.sax.InputSource; import org.xml.sax.HandlerBase;

83

import com.microstar.xml.SAXDriver; // public class MySAXDemo1 extends HandlerBase { private int indentcount = 0; // XML public static void main (String args[]) throws Exception { System.out.println("file=" + args[0]); // SAX org.xml.sax.Parser parser = new com.microstar.xml.SAXDriver(); // MySAXDemo handler = new MySAXDemo(); // parser.setDocumentHandler(handler); parser.setErrorHandler(handler); // XML XML FileReader fr = new FileReader(args[0]); // parser.parse(new InputSource(fr)); } // --------- HandlerBase // method // HandlerBase method ------------- public void startDocument () { System.out.println("XML "); } public void endDocument () { System.out.println("XML "); } public void startElement (String name,

84

AttributeList attributes) { indentcount ++; String indent = new String(""); for (int i=0; i 0) { String indent = new String(""); for (int i=0; i

Kuo 30 Java Application Java Windows 9x/NT/2000 DOS Linux shell java MySAXDemo1 book.xml

SAX import com.microstar.xml.SAXDriver; org.xml.sax.Parser parser = new com.microstar.xml.SAXDriver(); lfred SAXDrive XML lfred Java import org.xml.sax.helpers.*; SAX org.xml.sax.Parser parser = ParserFactory.makeParser(); MySAXDemo2.java // packages import java.io.FileReader; import java.lang.*; import org.xml.sax.Parser; import org.xml.sax.AttributeList; import org.xml.sax.InputSource; import org.xml.sax.HandlerBase; import org.xml.sax.helpers.*; // import com.microstar.xml.SAXDriver;

86

// public class MySAXDemo2 extends HandlerBase { private int indentcount = 0; // XML public static void main (String args[]) throws Exception { System.out.println("file=" + args[0]); // SAX //org.xml.sax.Parser parser = // new com.microstar.xml.SAXDriver(); org.xml.sax.Parser parser = ParserFactory.makeParser(); // MySAXDemo2 handler = new MySAXDemo2(); // parser.setDocumentHandler(handler); parser.setErrorHandler(handler); // XML XML FileReader fr = new FileReader(args[0]); // parser.parse(new InputSource(fr)); } // --------- HandlerBase // method

87

// HandlerBase method ------------- public void startDocument () { System.out.println("XML "); } public void endDocument () { System.out.println("XML "); } public void startElement (String name, AttributeList attributes) { indentcount ++; String indent = new String(""); for (int i=0; i 0) { String indent = new String(""); for (int i=0; i

} javac MySAXDemo2.java XML Java system property java -Dorg.xml.sax.parser=com.microstar.xml.SAXDriver MySAXDemo2 book.xml Apache Xerces java -Dorg.xml.sax.parser=org.apache.xerces.parsers.SAXParser MySAXDemo2 book.xml jar classpath set classpath=e:\xml\xerces.jar;%classpath% SAX 4 SAX http://www.megginson.com/SAX/ SAX version 1

3.4 Apache Xerces XML Parser Apache Xerces XML Parser

Apache Software Fundation Java XML parser Xerces-j 1.2.02000 8 XML 1.0 XML schemaW3C API SAX version 2 DOM level 2 SAX version 1 DOM level 1

http://xml.apache.org/dist/xerces-j/ Xerces.jar CLASSPATH Xerces /Xerces.jar set classpath=e:\xml\xerces.jar;%classpath% Xerces parser SAX SAX interface SAX XML class Apache Xerces parser SAX version 2SAX2 package

89

org.xml.sax org.xml.sax.helpers

SAX2 org.xml.sax package org.xml.sax.AttributeList SAX1 org.xml.sax.Attributes org.xml.sax.Attributes org.xml.sax.DTDHandler org.xml.sax.ContentHandler org.xml.sax.DocumentHandler SAX1 org.xml.sax.ContentHandler org.xml.sax.EntityResolver org.xml.sax.ErrorHandler org.xml.sax.Locator org.xml.sax.Parser SAX1 org.xml.sax.XMLReader org.xml.sax.XMLFilter org.xml.sax.XMLReader

org.xml.sax.HandlerBase SAX1 org.xml.sax.helpers.DefaultHandler org.xml.sax.InputSource

Exception org.xml.sax.SAXException org.xml.sax.SAXParseException org.xml.sax.SAXNotRecognizedException org.xml.sax.SAXNotSupportedException

SAX2 org.xml.sax.helpers package org.xml.sax.helpers.AttributeListImpl org.xml.sax.helpers.AttributesImpl org.xml.sax.helpers.DefaultHandler org.xml.sax.helpers.LocatorImpl org.xml.sax.helpers.NamespaceSupport org.xml.sax.helpers.ParserAdapter org.xml.sax.helpers.ParserFactory org.xml.sax.helpers.XMLFilterImpl org.xml.sax.helpers.XMLReaderAdapter org.xml.sax.helpers.XMLReaderFactory

90

org.xml.sax.XMLReader XML SAX XML org.xml.sax.XMLReader SAX1 org.xml.sax.Parser XML XML SAX Apache Xerces parser SAX version 2 parser org.xml.sax.XMLReader org.apache.xerces.parsers.SAXParser Java packages SAX2 Xerces SAX import org.xml.sax.XMLReader; import org.apache.xerces.parsers.SAXParser; object XMLReader parser = new SAXParser(); XML (xmluri XML URI) parser.parser(xmluri); Xerces SAX public void saxParser(String xmluri) { try { XMLReader parser = new SAXParser(); parser.parser(xmluri); } catch (SAXException e) { System.out.println(":"+ e.getMessage()); } catch (Exception e) { System.out.println(":"+ e.getMessage()); } } lefred parser event drivenXML XML Xerces parser SAX XML Event Handler Event Handler lfred SAX version 1SAX version 2 Event Handler SAX1 SAX1

org.xml.sax.ContentHandler org.xml.sax.ErrorHandler org.xml.sax.DTDHandler org.xml.sax.EntityHandler

DefaultHandler SAX1 HandlerBase XML Event Handler MySAX2Demo.java

91

import java.io.FileReader; import org.xml.sax.XMLReader; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; import org.apache.xerces.parsers.SAXParser; // public class MySAX2Demo extends DefaultHandler { private int indentcount=0; // XML public static void main (String args[]) throws Exception { // SAX XMLReader xr = new org.apache.xerces.parsers.SAXParser(); // MySAX2Demo handler = new MySAX2Demo(); // xr.setContentHandler(handler); xr.setErrorHandler(handler); // XML XML FileReader fr = new FileReader(args[0]); // xr.parse(new InputSource(fr)); } public MySAX2Demo () { super(); } // --------- DefaultHandler

92

// method // DefaultHandler method ------------- public void startDocument () { System.out.println("XML "); } public void endDocument () { System.out.println("XML "); } public void startElement (String uri, String localName, String qName, Attributes attributes) throws SAXException { indentcount ++; String indent = new String(""); for (int i=0; i 0) {

93

String indent = new String(""); for (int i=0; i

import org.xml.sax.XMLReader; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.helpers.XMLReaderFactory; // public class MySAX2Demo2 extends DefaultHandler { private int indentcount=0; // XML public static void main (String args[]) throws Exception { // SAX XMLReader xr = XMLReaderFactory.createXMLReader(); // MySAX2Demo2 handler = new MySAX2Demo2(); // xr.setContentHandler(handler); xr.setErrorHandler(handler); // XML XML FileReader fr = new FileReader(args[0]); // xr.parse(new InputSource(fr)); } public MySAX2Demo2 () { super(); } // --------- DefaultHandler // method // DefaultHandler method ------------- public void startDocument ()

95

{ System.out.println("XML "); } public void endDocument () { System.out.println("XML "); } public void startElement (String uri, String localName, String qName, Attributes attributes) throws SAXException { indentcount ++; String indent = new String(""); for (int i=0; i 0) { String indent = new String(""); for (int i=0; i

} } java -Dorg.xml.sax.parser=org.apache.xerces.parsers.SAXParser MySAX2Demo2 book.xml DOM W3C DOM event drivenevent handler XML DOM XML DOM DOM SAX DOM SAX XML SAX XML XML DOM

DOM

Apache Xerces DOM org.apache.xerces.parsers.DOMParser DOM import org.apache.xerces.parsers.DOMParser; import org.w3c.dom.Document; DOMParser parser = new org.apache.xerces.parsers.DOMParser(); XML DOM parser parser.parse(xmluri);

97

parser DOM doc Document Document node doc node Document doc = parser.getDocument(); XML DOM DOM DOM Docment nodeXML Docment DOM org.w3c.dom.Node DOM org.w3c.dom.NodeList

NodeNodeList

XML Processing InstructionDTD Node method getNodeType() node.getNodeType();

DOCUMENT_NODE DOCUMENT_FRAGMENT_NODE ELEMENT_NODE TEXT_NODE CDATA_SECTION_NODE COMMENT_NODE PROCESSING_INSTRUCTION_NODE ENTITY_NODE ENTITY_REFERENCE_NODE DOCUMENT_TYPE_NODE NOTATION_NODE ATTRIBUTE_NODE

processNode() public void processNode(Node node) { switch (node.getNodeType()) { case Node.DOCUMENT_NODE:

98

// break; case Node.ELEMENT_NODE: // break; case Node.TEXT_NODE: // break; case Node.CDATA_SECTION_NODE: // break; case Node.PROCESSING_INSTRUCTION_NODE: // break; case Node.ENTITY_REFERENCE_NODE: // break; case Node.DOCUMENT_TYPE_NODE: // break; ...... } } import java.lang.*; import java.io.*; import org.apache.xerces.parsers.DOMParser; import org.w3c.dom.*; import org.xml.sax.*; public class MyDOMDemo { private int indentcount=0; public static void main(String[] args) { String xmluri = args[0]; MyDOMDemo myparser = new MyDOMDemo(); myparser.startParse(args[0]);

99

} public void startParse(String xmluri) { try { org.apache.xerces.parsers.DOMParser parser = new DOMParser(); parser.parse(xmluri); Document doc = parser.getDocument(); // System.out.println("doc built"); processNode(doc); } catch (IOException e) { System.out.println("IO : "+e.getMessage()); } catch (SAXException e) { System.out.println("SAX : "+e.getMessage()); } catch (Exception e) { System.out.println(": "+e.getMessage()); } } public void processNode(Node node) { switch (node.getNodeType()) { case Node.ELEMENT_NODE: processElementNode(node); break; case Node.TEXT_NODE: processTextNode(node); break; case Node.CDATA_SECTION_NODE: // processCDATANode(node); break; case Node.PROCESSING_INSTRUCTION_NODE: //processPINode(node); break; case Node.ENTITY_REFERENCE_NODE: //processEntityRefNode(node); break; case Node.DOCUMENT_TYPE_NODE: //processDTDNode(node); break;

100

case Node.COMMENT_NODE: //processCommentNode(node); break; case Node.DOCUMENT_NODE: NodeList nodes = node.getChildNodes(); if (nodes != null) { for (int i=0; i

} indentcount --; } //processElementNode public void processAttributeNode(Node node) { indentcount ++; Attr attr = (Attr)node; System.out.println( ""+ getIndent(indentcount) + attr.getName()+"="+attr.getValue()); indentcount--; } public void processTextNode(Node node) { String s = node.getNodeValue().trim(); if (s.length()==0) return; indentcount ++; System.out.println(""+ getIndent(indentcount)+ s); indentcount --; } public String getIndent(int indentcount) { String indent = new String(""); for (int i=0; i

javac MyDOMDemo.java classpath xerces.jar set classpath=.;c:\jdk1.2.2\lib\tools.jar;e:\xml\xerces.jar XML book2.xml Palm Programming Kuo 30 500 java MyDOMDemo book2.xml

Java write once, run anywhere! import org.apache.xerces.parsers.DOMParser; org.apache.xerces.parsers.DOMParser parser = new DOMParser(); SAX DOM Sun JAXP DOM 4

3.5 Sun JAXPJava API for XML parsing Sun JAXPJava API for XML parsing

Sun Microsystem 1.0.1 XML 1.0 XML namespacesAPI SAX version 1DOM level 1 Pure Java API XML

103

JAXP Java extension javax SAX Java Sun project-X Apache Xerces Sun JAXP 1.1 JAXP 1.1 ea2Early Access 2JAXP 1.1 JAXP 1.0 JAXP Java API for XML Processing Parsing Processing JAXP JAXP 1.1 SAX version 2DOM level 2 XSL http://java.sun.com/xml/

Sun JAXP

JDK 1.1.8 PATH JAVA_HOME JDK C:\java C:\> set PATH=C:\java\bin;%PATH% C:\> set JAVA_HOME=C:\java JAXP http://java.sun.com/xml Windows jaxp-1_0_1-win.exeUnix jaxp-1_0_1.zip jaxp1.0.1

licence docs/api/* API javadoc examples/* readme.html install.html relnotes.html Release jaxp.jar Jaxp JAR parser.jar Sun JAR SAX1 DOM1

CLASSPATH jaxp.jar parser.jar Windows C:\jaxp1.0.1\jaxp.jar; C:\jaxp1.0.1\parser.jar UnixLinux /jaxp1.0.1/jaxp.jar:/jaxp1.0.1/parser.jar JAXP

104

Sun JAXP Packages: javax.xml.parsers org.w3c.dom org.xml.sax org.xml.sax.helper

SAX JAXP SAX import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.*; import java.io.*; system propertyjavax.xml.parsers.SAXParserFactory com.sun.xml.parser.Parser SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser parser = factory.newSAXParser(); SAX evnet handler JAXP_SAX_1 HandlerBase method public void startElement (String name, AttributeList attrs) throws SAXException { ...... } public void endElement (String name) throws SAXException { ...... } public void characters (char buf [], int offset, int len) throws SAXException { ...... } ...... DTD factory.setValidating(true); Namespace factory.setNamespaceAware(true); XML xmluri XML URIhandler Event Handler parser.parse(xmluri, handler);

105

JAXP_SAX_1.java // packages //import java.io.FileReader; import java.io.*; import java.lang.*; import org.xml.sax.Parser; import org.xml.sax.AttributeList; import org.xml.sax.InputSource; import org.xml.sax.HandlerBase; import org.xml.sax.SAXException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; // public class JAXP_SAX_1 extends HandlerBase { private int indentcount = 0; // --------- HandlerBase // method // HandlerBase method ------------- public void startDocument () { System.out.println("XML "); } public void endDocument () { System.out.println("XML "); } public void startElement (String name, AttributeList attributes) { indentcount ++; String indent = new String(""); for (int i=0; i

System.out.println(":"+indent+ name); } public void endElement (String name) { indentcount --; } public void characters (char ch[], int start, int length) { String s = (new String(ch, start, length)).trim(); if (s.length() > 0) { String indent = new String(""); for (int i=0; i

factory.setNamespaceAware(false); // HandlerBase handler = new JAXP_SAX_1(); // XML XML FileReader fr = new FileReader(xmluri); // // parser.parse(new InputSource(fr), handler); } catch (SAXException e) { System.out.println("SAX "+e.getMessage()); } catch (IOException e) { System.out.println("IO "+e.getMessage()); } catch (Exception e) { System.out.println(e.toString()); } } } JAXP SAX version 1 HandlerBase javac JAXP_SAX_1.java classpath XML pc.xml K7-800 Voodoo 3 3000 128M Seagate 15G java JAXP_SAX_1 pc1.xml

108

DOM JAXP DOM import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance(); DocumentBuilder parser = factory.newDocumentBuilder(); DTD factory.setValidating(true); Namespace factory.setNamespaceAware(true); XML DOM Document doc =parser.parse(xmluri); (JAXP_DOM_1.java) // packages //import java.io.FileReader; import java.io.*; import java.lang.*; import org.xml.sax.InputSource; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.*; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; // public class JAXP_DOM_1 { private int indentcount = 0; public static void main (String args[]) {

109

if (args.length==0) { System.out.println(" JAXP_DOM_1 XML "); System.exit(0); } String xmluri = args[0]; String p = System.getProperty("javax.xml.parsers.DocumentBuilderFactory"); System.out.println("file=" + xmluri); System.out.println("property="+p); MyDOMDemo myparser = new MyDOMDemo(); myparser.startParse(args[0]); } public void startParse(String xmluri) { DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance(); factory.setValidating(false); factory.setNamespaceAware(false); try { DocumentBuilder parser = factory.newDocumentBuilder(); // XML XML FileReader fr = new FileReader(xmluri); Document doc = parser.parse(new InputSource(fr)); processNode(doc); // doc.getDocumentElement ().normalize (); //System.out.println ("\n" + // doc.getDocumentElement().getNodeName()); } catch (SAXParseException e) { System.out.println ("XML " + " line " + e.getLineNumber () + "uri " + e.getSystemId ()); System.out.println(" " + e.getMessage ()); } catch (SAXException e) { Exception x = e.getException (); ((x == null) ? e : x).printStackTrace (); } catch (Throwable t) { t.printStackTrace ();

110

} } public void processNode(Node node) { switch (node.getNodeType()) { case Node.ELEMENT_NODE: processElementNode(node); break; case Node.TEXT_NODE: processTextNode(node); break; case Node.CDATA_SECTION_NODE: // processCDATANode(node); break; case Node.PROCESSING_INSTRUCTION_NODE: //processPINode(node); break; case Node.ENTITY_REFERENCE_NODE: //processEntityRefNode(node); break; case Node.DOCUMENT_TYPE_NODE: //processDTDNode(node); break; case Node.COMMENT_NODE: //processCommentNode(node); break; case Node.DOCUMENT_NODE: NodeList nodes = node.getChildNodes(); if (nodes != null) { for (int i=0; i

indentcount ++; System.out.println( ""+ getIndent(indentcount) + node.getNodeName()); // NamedNodeMap attributes = node.getAttributes(); for (int i=0; i

if (s.length()==0) return; indentcount ++; System.out.println(""+ getIndent(indentcount)+ s); indentcount --; } public String getIndent(int indentcount) { String indent = new String(""); for (int i=0; i

CPUAMD Athlon 1GHz 256M DDR 30G bytes DVD-ROM10x CD-RW 12x Voodoo 5 Yamaha 724 15 inches TFT

114

4 Java/XML

4.1 Java/XML ...

Java Java AppletJava ApplicationJava ServletJava Server Pages

Java XML XML JDOM Java XML XSLT J.Clark XT XML Web Service

XML-RPC SOAP PHP

i18ninternationalization JavaXML Internet duel-byte encoded XT SOAP

Java/XML Java Java Development KitJDK Sun JDK1.3 SolarisLinux Windows Sun Java http://java.sun.com/j2se/ Linux JDK RPM tar.gz RedHat Linux tar.gz Linux JDK1.3.0 Sun 1.3.0_01 http://java.sun.com/j2se/1.3.0_01/index.html Java Sun Java Unicode Java Sun JDK ......

115

Sun Java Linux Linux Sun Java Java Development Kits Linux Blackdown JDK JDK1.0.x Java SDK 1.3.x Sun 1.3 Linux JDK Blackdown Blackdown JDK http://www.blackdown.org/java-linux.html Blackdown JDK ftp://ftp1.sinica.edu.tw/pub1/java/linux/blackdown/ XML parser Java Java XML Windows Linux

SAX version 1 version 2

http://www.megginson.com/SAX lfred XML

http://www.opentext.com/services/content_management_services/aelfred.zip Apache Xerces

http://xml.apache.org/dist/xerces-j/ JDOM

http://www.jdom.org JDOM beta 5 jdom-b5.tar.gz jdom-b5.zip JDOM

JAXP

http://java.sun.com/xml

Web Server Java appletJava servlet Java Server Pages Web Server Web Server Apache Apache Web Server http://www.apache.org Apache

Linux Apache Web Server

116

Linux Apache RedHat Linuxdatadir/home/httpd/html Apache httpd.confaccess.confsrm.conf RedHat Linux /etc Apache apache_1.3.xx.tar.gz/usr/local Apache tar zxvf apache_1.3.xx.tar.gz cd /usr/local/apche_1.3.xx ./configure --prefix=/usr/local/apache make make install Apache Web Server /usr/local/apache/bin/apachectl start /usr/local/apache/htdocs

Windows Apache Web Server

Windows Apache apache_1_3_12_win32.exe \Apache Group\Apache\htdocs JSDKJava Servlet Development Kit Sun Servlet 1999/04/21 JSDK 2.1 Servlet 2.1 JSWDKJavaServer Pages Web Development Kit Jakarta-Tomcat servlet.jar Servlet JSWDK Jakarta-Tomcat Servlet engine Servlet JSWDKJavaServer Pages Web Development Kit JSP Sun UnixJDK1.1.x Win32JDK1.2

Windows Linuxbash

set JAVA_HOME=c:\jdk1.2.2 export JAVA_HOME =/jdk1.2.2 set CLASSPATH=.;%JAVA_HOME%\ lib/tools.jar

export CLASSPATH=.:$JAVA_HOME/ lib\tools.jar

JSWDK Webserver.jar Servlet Engine

117

lib/jspengine.jar JSP Engine lib/servlet.jar Servlets API lib/xml.jar XML

JSWDK JSP ServletsHTML URL http://www.MyBookstore.com/bookshop JSWDK

JSWDK JSWDK /jswdk-1.0.1

/jswdk-1.0.1/bookshop/WEB-INF/servlets

JSWDK Webserver.xml

Servlets

Servlet bookshop/WEB-INF/servletsbookshop/WEB-INF/servlets.properties

bookshop.code=BookshopServlet bookshop.initparams=foo

http://www.MyBookstore.com/bookshop/servlet/BookshopServlet servlet BookshopServlet

bookshop/WEB-INF/mappings.properties

/Bookshop=bookshop

bookshop servlets.properties bookshop.code

http://www.bookstore.com:8080/bookshop/Bookshop bookshop Bookshop

JSP JavaBeans

JSP jsp

118

/bookshop/jsp

JavaBeans JSWDK server Classpath JSWDK sever startserver.bat

WEBAPP/WEB-INF/mappings.properties WEBAPP/WEB-INF/servlets.properties Tomcat server

JSP http://localhost:8080/WEBAPP/yourjsp.jsp

Servlet engine and JSP engine Java Servlet JavaServer Pages Web Server Web Server Servlet engine JSP engine Apache Web Server Apache Group Jakarta TomcatServlet JSP engine Web Server Tomcat Tomcat Apache Web Server Microsoft Internet Information Server 4.0 Microsoft Personal Web Server, version 4.0 Netscape Enterprise Serverversion 3.0 http://jakarta.apache.org/ Tomcat Apache Web Server Tomcat Apache Web Server Apache Web Server JDK Tomcat jakarta-tomcat.tar.gz tar zxvf jakarta-tomcat.tar.gz /Jakarta-tomcat

Linux WindowsCLASSPATH .:/jdk1.2.2/lib/tools.jar .;c:\jdk1.2.2\lib\tools.jar JAVA_HOME /jdk1.2.2 c:\jdk1.2.2 TOMCAT_HOME /Jakarta-tomcat c:\Jakarta-tomcat ANT_HOME /Jakarta-tomcat c:\Jakarta-tomcat

Apache Apache mod_jserv.soLinux http://jakarta.apache.org/builds/tomcat/release/v3.1/bin/linux/i386/mod_jserv.so (Win32 ApacheModuleJServ.DLL) Apache RedHat Linux /usr/lib/apache

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Tomcat jakarta-tomcat/conf tomcat-apache.conf LoadModule jserv_module modules/mod_jserv.so Apache Web Server http.confRedHat Linux /etc/httpd/conf Include "/jakarta-tomcat/conf/tomcat-apache.conf" Tomcat server

4.2 Client side Java XML Client side Java XML Java applet XML

Java xBase dBASEClipperFoxPro DOS Novell Netware 14400bps modem Java applet Java applet Java Java applet Java applet Netscape Navigator Microsoft Internet Explorer Java applet

Java applet XML

Java applet XML Joystick.xml Java applet XML hard core XML XML HTML XML HTML Applet XML XML HTML XML lfred Event Handler Joystick.class

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lfred Event Handler MyHandler.class XML Joystick ProductsDemo.class Joystick HTML ProductsDemo.html Applet ProductsDemo2.html jar

Java applet XML lfred 23KB applet XML Java applet Java applet JDK appletviewer Applet XML

lfred validating XML DTD validating XML XML DTD joystick.dtd XML joystick.xml

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Saitek X36 Flight Controller Saitek http://www.saitek.com/ USB Yes 7 3 Yes Yes $99.95 F-16 CombatStick(R) USB CH Products http://www.chproducts.com USB Yes 6 2 Yes No $74.95 SFS Flight Controller USB Suncom Inc. http://www.suncominc.com USB Yes 5 1 No No $95

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Joystick.java Joystick Joystick.java import java.util.*; /** XML XML XML getXXX method */ class Joystick { private String jsname, company, Website, io, button,hat,throttle,rudder, price, picture; /** Constructor */ public Joystick (String jsname, String company, String Website, String io, String button, String hat, String throttle,String rudder, String price, String picture) { this.jsname = jsname; this.company = company; this.Website = Website; this.io = io; this.button = button; this.hat = hat; this.throttle = throttle; this.rudder = rudder; this.price = price; this.picture = picture; //... debug //System.out.println("Joystick.class:"+jsname+","+company //+","+Website+","+io+","+price+","+picture); }

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public String getJsname () { return jsname; } public String getCompany () { return company; } public String getWebsite () { return Website; } public String getIo () { return io; } public String getButton () { return button; } public String getHat () { return hat; } public String getThrottle () { return throttle; } public String getRudder () { return rudder; } public String getPrice () { return price; } public String getPicture () { return picture; } } MyHandler.java MyHandler.java XML import com.microstar.xml.XmlHandler; import com.microstar.xml.XmlParser; import com.microstar.xml.HandlerBase; import java.applet.*; import java.awt.*; import java.util.*; class MyHandler extends HandlerBase { private Choice jschoice; // awt choice private Vector js; // Vector private String currentElementName;// Event handler private String jsname; // XML private String company, Website; private String button, hat, throttle, rudder; private String io, price; private String picture; private String attrname; // private String attrvalue; //

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// Joystick Vector public MyHandler (Choice jschoice) { js = new Vector(); this.jschoice = jschoice; } // js Vector Joystick method public Joystick getJs (int index) { if (index < js.size()) { // ...debug System.out.println("Index:"+ new Integer(index).toString()); return (Joystick) js.elementAt(index); } else { // ...debug //System.out.println("Index > js no."); } // return (Joystick) js.elementAt(index); } // HandlerBase method public void startElement (String name) { // currentElementName = name; // PICTURE picture if (currentElementName.equals ("PICTURE")) { picture = attrvalue; //... debug System.out.println("PICTURE "+attrname+":"+attrvalue); }

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} // tag Joystick // XML Joystick // Joystick js Vector public void endElement (String name) { if (name.equals ("JOYSTICK")) { Joystick j = new Joystick( jsname, company, Website, io, button,hat, throttle,rudder, price, picture); js.addElement(j); //... debug // System.out.println("new JS was built"); } } // public void attribute(String aname, String avalue, boolean isSpecified) { attrname = aname; attrvalue = avalue; } // public void charData (char ch[], int start, int length) { String s = new String (ch, start, length); if (s.trim().length() == 0) return; //.. debug System.out.println("data:"+currentElementName+"("+s+")"); if (currentElementName.equals ("JSNAME")) jsname = s;

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else if (currentElementName.equals ("COMPANY")) company = s; else if (currentElementName.equals ("WEBSITE")) Website = s; else if (currentElementName.equals ("IO")) io = s; else if (currentElementName.equals ("BUTTON")) button = s; else if (currentElementName.equals ("HAT")) hat = s; else if (currentElementName.equals ("THROTTLE")) throttle = s; else if (currentElementName.equals ("RUDDER")) rudder = s; else if (currentElementName.equals ("PRICE")) price = s; } // XML Vector Joystick //(jsname) jschoice public void endDocument () { Joystick j; for (int i=0; i

import java.util.*; import java.io.*; public class ProductsDemo extends Applet implements ItemListener { private XmlParser parser; // Alfred private MyHandler handler; // // Alfred private java.awt.Choice jschoice; // GUI private Image pic[]; // private MediaTracker tracker; private Hashtable hashtable; private Dimension dim; private Graphics offScreenGraphics; private Image offScreen; private Joystick curJS; // Joystick private String font1; // HTML private int picX; // HTML X private int picY; // HTML Y // Applet public void init () { // choice initGUI(); // XML handler = new MyHandler(jschoice); // Event Handler parser = new XmlParser(); // XML parser.setHandler(handler); // Event Handler XML // HTML HTML // tag // String xmldoc = getParameter ("url"); // XML font1 = getParameter ("font1"); // Applet // Applet picX = new Integer( getParameter ("picX") ).intValue();

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picY = new Integer( getParameter ("picY") ).intValue(); // ... for debug // System.out.println ("URL: "+xmldoc); try { // XML URL xmlURL = new URL (getDocumentBase(), xmldoc); //... debug // System.out.println ("start parse "+xmlURL.toString()); // XML parser.parse(xmlURL.toString(), (String)null, (String) null); //.. debug // System.out.println ("parse ok "+xmlURL.toString()); } catch (Exception e) { e.printStackTrace(); } // initPics(); } /** Init GUI of Applet */ // jschoice private void initGUI () { this.setLayout (null); jschoice = new java.awt.Choice(); jschoice.addItem ("......"); this.add (jschoice); jschoice.addItemListener (this); jschoice.setBounds (10,40,200,30); } /** */ private void initPics () {

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String picfile= new String(""); tracker = new MediaTracker (this); hashtable = new Hashtable(); // int itemCount = jschoice.getItemCount(); // pic= new Image[itemCount-1]; for (int i=0; i

// ... for debug //System.out.println("jsname:"+curJS.getJsname()); //System.out.println("IO:"+curJS.getIo()); //System.out.println("Com:"+curJS.getCompany()); //System.out.println("Web:"+curJS.getWebsite()); //System.out.println("Pic:"+curJS.getPicture()); //System.out.println("$:"+curJS.getPrice()); // .............. } public void paint (Graphics g) { update (g); } // Applet public void update (Graphics g) { if (dim==null) { dim = this.getSize (); // Java double buffer offScreen = createImage (dim.width, dim.height); offScreenGraphics = offScreen.getGraphics(); } offScreenGraphics.setColor (Color.white); offScreenGraphics.fillRect (0,0,dim.width, dim.height); offScreenGraphics.setColor (Color.black); offScreenGraphics.setFont (new Font (font1, Font.BOLD, 16)); offScreenGraphics.drawString ("", 10,20); offScreenGraphics.setColor (new Color (140,30,72)); offScreenGraphics.setFont (new Font (font1, Font.PLAIN, 14)); // Joystick if (curJS != null) { offScreenGraphics.drawString (": "+ curJS.getCompany(), 10,100); offScreenGraphics.setColor (new Color (50,40,151));

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offScreenGraphics.drawString (": "+ curJS.getWebsite(), 10, 120); offScreenGraphics.drawString (": "+ curJS.getIo(), 10, 140); offScreenGraphics.drawString (": "+ curJS.getPrice(), 10, 160); offScreenGraphics.drawString (": "+ curJS.getButton(), 10,180); offScreenGraphics.drawString (":"+ curJS.getHat(), 10,200); offScreenGraphics.drawString (":"+ curJS.getThrottle(), 10,220); offScreenGraphics.drawString (": "+ curJS.getRudder(), 10,240); Integer picIndex = (Integer) hashtable.get(curJS.getPicture()); // ... for debug //System.out.println("PicIndex="+picIndex.intValue()); offScreenGraphics.drawImage (pic[picIndex.intValue()], picX,picY, this); } // g.drawImage (offScreen, 0,0, null); } } classpath aelfred.jar Applet javac ProductsDemo.java Joystick.java MyHandler.java ProductsDemo.java Joystick.class MyHandler.class ProductsDemo.class

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appletviewer HTML ProdutctsDemo.html Applet HTML JDK appletviewer appletviewer ProductsDemo.html applet appletviewer

System.out.println(......);

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HTML ProductsDemo.html

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Applet Web Server Web Server Apache Web Server Apache Web Server datadirRedHat Linux /home/httpd/html/Win32 .../Apache group/Apache/htdocs/ AppletTest copy ProductsDemo.class MyHandler.class Joystick.class Saitek_X36.gif Suncom_SFSFC_USB.jpg CH_F16CS2000.gif ProductsDemo.html lfred class aelfred.jar WinZip Unzip com/microstar/xml/*.class Web Server doc root AppletTest

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Apache Web Server http://localhost/AppletTest/ProductsDemo.html

class lfred class jar class Alfred com/ProductsDemo.jar jar cvf ProductsDemo.jar com/ ProductsDemo.class Joystick.class MyHandler.class jar Java classXML ProductsDemo.jar AppletTest HTML archive ProductsDemo2.html

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http://localhost/AppletTest/ProductsDemo2.html

Java Application XML Java ApplicationJava Java Java Application Java Visual MachineJVM JDK java jreJava Runtime Environment Java Application Java Application main() method public static void main(String args[]) Java Application Java main() method JavaBeans main() method Java Application JavaBeans XML XML JDOM

JDK XML JDOM Apache Xercesjdom.jarxerces.jar

JDOM 3 SAX DOM SAX DOM Java

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SAX DOM XML JDOM Java XML API Brett McLaughlinJason Hunter James Duncan Davidson JDOM Java API J Java DOM XML DocumentObject model DOM JDOM namespaceDTD Java 2 ListMap JDOM Java XML SAX DOM Java XML SAX XML SAX DOM JDOM http://www.jdom.org JDOM API JDOM org.jdom.input.SAXBuilder SAX org.jdom.input.DOMBuilder DOM JDOM JDOM Document model DOM DOMBuilder SAXBuilder XML Builder builder = new SAXBuilder(saxDriverClass); Document doc = builder.build(xmldoc); Builder build(...) method

File InputStream URL

InputStream XML org.jdom.Element Element element = new Element(element_name); attribute element.addAttribute(attribute_name); // List child_elements = element.getChildren(); // List child_elements = element.getChildren(child_element_name);

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List attributes = element.getAttributes(attribute_name) XML JDOM API XML org.jdom.output.XMLOutputter XMLOutputter() XMLOutputter(String indent) XMLOutputter(String indent, boolean newlines) method output(Document doc, OutputStream out) XML XML XML addressbook.xml DTD XML 27093666

Person.java Addressbook.java XML MyWindowListener.java GUI ABGUI.java

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Persion.java Person.java /**

* */

class Person { private String name, address, telo;

*/ public Person (String name, String address,

this.name = name; this.address = address;

}

this("","",""); }

public String getName () { return name; } public String getAddress () { return address; }

* XML Person

/** Constructor

String telo) {

this.telo = telo;

public Person () {

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public String getTelo () { return telo; } }

Addressbook.java Addressbook.java XML import java.io.*;

import org.jdom.Element; import org.jdom.JDOMException; import org.jdom.input.SAXBuilder;

getXXX() method

import org.jdom.Document;

import org.jdom.output.XMLOutputter; import java.util.*; /** * Addressbook * * */ public class Addressbook { // static public static Addressbook ab = new Addressbook(); // method public static Addressbook getAddressbook() { return ab; } // JDOM XML Xerces SAX parser private static final String DEFAULT_SAX_DRIVER_CLASS = "org.apache.xerces.parsers.SAXParser";

private String saxDriverClass; private SAXBuilder builder;

//JDOM private Document doc;

// Person Hashtable private Hashtable table = new Hashtable(); private String xmldoc = "";

private Element root;

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private Addressbook() { this.saxDriverClass = DEFAULT_SAX_DRIVER_CLASS;

// private

builder = new SAXBuilder(saxDriverClass); } // XML public void startParse(String filename) throws IOException, JDOMException { this.xmldoc = filename; // InputStream FileInputStream fis = new FileInputStream(filename); // InputStream InputStreamReader // Big5 InputStreamReader isr = new InputStreamReader(fis, "Big5"); // InputStreamReader JDOM Document doc = builder.build(isr); // JDOM Document root = doc.getRootElement(); // List List list=root.getChildren(); Element element; Iterator fields; String name=""; String address=""; String telo=""; Person newPerson; // List // // Person if (! list.isEmpty() ) { Iterator records = list.iterator();

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while (records.hasNext()) { element = (Element)records.next(); if (element.getName().equals("person")) { fields = element.getChildren().iterator(); while (fields.hasNext()) { element = (Element)fields.next(); if (element.getName().equals("name")) { name = element.getText(); System.out.println("name="+element.getText()); } else if (element.getName().equals("address")) { address = element.getText(); System.out.println("address="+element.getText()); } else if (element.getName().equals("telo")) { telo = element.getText(); System.out.println("telo="+element.getText()); } } // Person newPerson = new Person( name, address, telo); // Person Hashtable key table.put(name, newPerson); } } } } // xmldoc OutputStream public void close() throws IOException, JDOMException { startOutputXML(new FileOutputStream(xmldoc)); }

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// XML XMLOutputter OutputStream private void startOutputXML(OutputStream out) throws IOException, JDOMException { // Create an outputter with default formatting XMLOutputter outputter = getXMLOutputter(); outputter.output(doc, out); } // XMLOutputter Big5 private XMLOutputter getXMLOutputter() throws IOException, JDOMException { // Create an outputter with certain encoding XMLOutputter outputter = new XMLOutputter(" ", true, "Big5"); outputter.setTrimText(true); outputter.setExpandEmptyElements(true); return outputter; } // public void add(Person p) { // add Person to Hashtable table.put(p.getName(), p); addToXML(p); } // JDOM private void addToXML(Person p) { Element curPerson = new Element("person"); Element curName = new Element("name"); curName.addContent(p.getName()); Element curAddress = new Element("address"); curAddress.addContent(p.getAddress());

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Element curTelo = new Element("telo"); curTelo.addContent(p.getTelo()); curPerson.addContent(curName); curPerson.addContent(curAddress); curPerson.addContent(curTelo); root.addContent(curPerson); } // public Person searchByName(String key) { // search name in XML tree Person p = (Person)table.get(key); return p; } // public void remove(String name) { Person p = (Person)table.get(name); if (p==null) { System.out.println(name+" not found"); return; }; if (table.remove(name) == null) { System.out.println("remove "+name+" error!"); return; } removeFromXML(); } // JDOM private void removeFromXML() { Enumeration persons = table.elements(); Person p; //System.out.println("new root");

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root = new Element("addressbook"); //System.out.println("add elements to root"); while (persons.hasMoreElements() ) { p = (Person)persons.nextElement(); //System.out.println("add one person: "+p.getName()); addToXML(p); } doc.setRootElement(root); } } MyWindowListener.java Java GUI MyWindowListener.java import org.jdom.JDOMException; import java.awt.*; import java.awt.event.*; import java.io.IOException; class MyWindowListener extends WindowAdapter { // Addressbook Addressbook addressbook = Addressbook.getAddressbook(); public void windowClosing(WindowEvent e) { try { // XML addressbook.close(); System.exit(1); } catch (JDOMException ex) { System.out.println("JDOM Exception: "+ex.toString()); } catch (IOException ex) { System.out.println("IO Excption:"+ex.toString()); } } } ABGUI.java ABGUI.java import java.awt.*; import java.awt.event.*;

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import javax.swing.*; import java.net.*; /** * Addressbook * Graphic User Interface * * * */ public class ABGUI extends JFrame { private Person p; private Addressbook addressbook = Addressbook.getAddressbook(); private String xmldoc = "addressbook.xml"; private Font f1 = new Font("", Font.PLAIN, 16); private JButton buttonAdd=new JButton(""); private JButton buttonSearchByName=new JButton(""); private JButton buttonRemove =new JButton(""); private JButton buttonClearFields=new JButton(""); private JTextField fieldName=new JTextField("",40); private JTextField fieldAddress=new JTextField("",40); private JTextField fieldTelo=new JTextField("",40); private JLabel labelName = new JLabel(":"); private JLabel labelAddress = new JLabel(":"); private JLabel labelTelo = new JLabel(":"); private JLabel labelMsg = new JLabel(""); private Container c; public ABGUI() { super(""); // XML try {

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addressbook.startParse(xmldoc); } catch (Exception e) { System.out.println(e.toString()); } // GUI c = getContentPane(); c.setLayout(new BorderLayout()); JPanel pn = new JPanel(); JPanel pc = new JPanel(); buttonAdd.setFont(f1); buttonSearchByName.setFont(f1); buttonRemove.setFont(f1); buttonClearFields.setFont(f1); fieldName.setFont(f1); fieldAddress.setFont(f1); fieldTelo.setFont(f1); labelName.setFont(f1); labelAddress.setFont(f1); labelTelo.setFont(f1); labelMsg.setFont(f1); pn.add(buttonAdd); pn.add(buttonSearchByName); pn.add(buttonRemove); pn.add(buttonClearFields); c.add(pn,BorderLayout.NORTH); pc.add(labelName); pc.add(fieldName); pc.add(labelAddress); pc.add(fieldAddress); pc.add(labelTelo);

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pc.add(fieldTelo); c.add(pc,BorderLayout.CENTER ); c.add(labelMsg,BorderLayout.SOUTH); setSize(400,250); setVisible(true); buttonAdd.addActionListener (new AppListener()); buttonSearchByName.addActionListener (new AppListener()); buttonRemove.addActionListener (new AppListener()); buttonClearFields.addActionListener (new AppListener()); } // GUI event Listener class AppListener implements ActionListener { public void actionPerformed(ActionEvent e) { String name = fieldName.getText(); String address =fieldAddress.getText(); String telo=fieldTelo.getText(); if (e.getSource()==buttonAdd) { p = new Person( name, address, telo ); addressbook.add(p); } else if(e.getSource()==buttonSearchByName) { p = addressbook.searchByName(name);

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if (p!=null) { fieldName.setText(p.getName()); fieldAddress.setText(p.getAddress()); fieldTelo.setText(p.getTelo()); } else { labelMsg.setText("!"); } } else if (e.getSource()==buttonRemove) { addressbook.remove(name); } else if (e.getSource()==buttonClearFields) {