-- 作者：ncki
-- 发布时间：10/4/2007 2:22:00 AM
-- 一个很奇怪的问题 用DOM开发xml 文件时，居然不能解析带外部DTD的xml（我快要爆炸了）
源码：
01：
package org.nc.xml.xmlparse; import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Entity;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Notation; public class ParseDocType {
public static void show(Document document){
DocumentType documentType = document.getDoctype();
if(documentType != null){
System.out.println("dtd Name :"+ documentType.getName());
System.out.println("dtd public id :"+ documentType.getPublicId());
System.out.println("dtd system id :"+ documentType.getSystemId());
System.out.println("dtd internal subset :"+ documentType.getInternalSubset());
System.out.println();
NamedNodeMap entities = documentType.getEntities();
for(int i = 0 ;i<entities.getLength();i++){
Entity entity = (Entity)entities.item(i);
System.out.println("entity name : "+entity.getNodeName());
System.out.println("notation name : " + entity.getNotationName());
System.out.println("entity public id : " + entity.getPublicId());
System.out.println("entity system id : " + entity.getSystemId());
System.out.println();
}
NamedNodeMap notations = documentType.getNotations();
for(int i = 0 ;i<notations.getLength();i++){
Notation notation = (Notation)notations.item(i);
System.out.println("notation name : "+notation.getNodeName());
System.out.println("notation public id : "+notation.getPublicId());
System.out.println("notation name : "+notation.getSystemId());
System.out.println();
}
}
}
public static void main(String[] args) {
Document document = new XMLParse("src/students.xml").getDocument();
ParseDocType.show(document);
}
}
02：
package org.nc.xml.xmlparse; import java.io.File;
import java.io.IOException; import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class XMLParse {
private Document document;
public XMLParse(String xmlFileName){
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder docmentBuilder = documentBuilderFactory.newDocumentBuilder();
this.document = docmentBuilder.parse(new File(xmlFileName));
} catch (ParserConfigurationException ex) {
ex.printStackTrace();
} catch (SAXException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
public Document getDocument() {
return document;
}
}
测试用例： package org.nc.xml.test;
import org.nc.xml.xmlparse.XMLParse;
org.nc.xml.xmlparse.ParseDocType;
import org.w3c.dom.Document; public class TestCase extends junit.framework.TestCase {
public void testParseDocType() {
Document document = new XMLParse("src/students.xml").getDocument();
ParseDocType.show(document);
}
xml文档： students.xml
<?xml version="1.0" encoding="gb2312" standalone="yes"?>
<!DOCTYPE students[
<!ELEMENT students (student+)>
<!ELEMENT student (Name,Department,Class,Course+)>
<!ATTLIST student ID CDATA #REQUIRED>
<!ELEMENT Name (#PCDATA)>
<!ELEMENT Department (#PCDATA)>
<!ELEMENT Class (#PCDATA)>
<!ELEMENT Course (CName,ExamDate,Teacher,CMark,CTime,CType,Score)>
<!ELEMENT CName (#PCDATA)>
<!ELEMENT ExamDate (#PCDATA)>
<!ELEMENT Teacher (#PCDATA)>
<!ELEMENT CMark (#PCDATA)>
<!ELEMENT CTime (#PCDATA)>
<!ELEMENT CType (#PCDATA)>
<!ELEMENT Score (#PCDATA)>
]>
<students>
<student ID="103220533">
<Name>studentsOne</Name>
<Department>计算机系</Department>
<Class>网通班</Class>
<Course>
<CName>Java</CName>
<ExamDate>2006-12-29</ExamDate>
<Teacher>nameOne</Teacher>
<CMark>6</CMark>
<CTime>96</CTime>
<CType>主修</CType>
<Score>88</Score>
</Course>
</student>
</students>
如果你把内部DTD 放到外部文件中 然后用<!DOCTYPE students "-//nc//STUNET 1.0//CH" "students.dtd"> 在xml文件中声明。。。。然后测试你会得到如下的错误：
java.net.MalformedURLException: no protocol: students.dtd
at java.net.URL.<init>(URL.java:567)
at java.net.URL.<init>(URL.java:464)
at java.net.URL.<init>(URL.java:413)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:968)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:905)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:872)
at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:282)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(XMLDocumentScannerImpl.java:1021)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:250)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:292)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:172)
at org.nc.xml.xmlparse.XMLParse.<init>(XMLParse.java:27)
at org.nc.xml.test.TestCase.testParseDocType(TestCase.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
哪个大虾看看我是怎么错的
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