dom4j 学习

zz  G_G

直接看代码..
dom4j 的一般使用都在里面了
/lib/dom4j-1.6.1.jar
/lib/jaxen-1.1-beta-6.jar

package  useDom4j.test.supper;

import  java.io.File;
import  java.io.FileOutputStream;
import  java.io.IOException;
import  java.io.InputStream;
import  java.io.OutputStream;
import  java.net.URL;
import  java.util.Iterator;
import  java.util.List;
import  java.util.regex.Matcher;
import  java.util.regex.Pattern;

import  javax.xml.parsers.DocumentBuilder;
import  javax.xml.parsers.DocumentBuilderFactory;

import  junit.framework.TestCase;

import  org.dom4j.Document;
import  org.dom4j.DocumentFactory;
import  org.dom4j.DocumentHelper;
import  org.dom4j.Element;
import  org.dom4j.Node;
import  org.dom4j.QName;
import  org.dom4j.Visitor;
import  org.dom4j.VisitorSupport;
import  org.dom4j.XPath;
import  org.dom4j.io.DOMReader;
import  org.dom4j.io.HTMLWriter;
import  org.dom4j.io.OutputFormat;
import  org.dom4j.io.SAXReader;
import  org.dom4j.io.XMLWriter;


public   class  useDom4jTest  extends  TestCase {

     // use all
     private  String path ;
     private  ClassLoader clo;
     //  file path -> bin 
     private  String classPath ;
     // use save 
     static   private  Document doc;
     private  String filese;

     protected   void  setUp()  throws  Exception {
         super .setUp();
        path  =   " useDom4j/test/config/test.xml " ;
        clo  =   this .getClass().getClassLoader();
        classPath  =  System.getProperty( " java.class.path " ).split( " ; " )[ 0 ]   ;
        filese  =  System.getProperty( " file.separator " );
    }

     protected   void  tearDown()  throws  Exception {
         super .tearDown();
    }

    
     public   void  testRead() throws  Exception{
        SAXReader sax  =   new  SAXReader();
         // File read
        Document docF  =   sax.read(
                 new  File(clo.getResource(path).getFile())
                    );
        assertNotNull( " is File saxReader err " ,docF);
        
         // InPutStream read 
        Document docI  =  sax.read( clo.getResourceAsStream(path) );
        assertNotNull( " is InPutStream saxReader err " ,docI);
        
         // URL read 
        Document docU  =  sax.read( clo.getResource(path) );
        assertNotNull( " is Url saxReader err " ,docU);
        
    }
    
     /**  converts a W3C DOM document into a dom4j document  */
     public   void  testConversion()  throws  Exception{
          DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();
          DocumentBuilder dombuilder = domfac.newDocumentBuilder();
          InputStream input  =   clo.getResourceAsStream(path) ;
          org.w3c.dom.Document doc3c  =  dombuilder.parse( input );
          DOMReader xmlReader  =   new  DOMReader();
          assertEquals(  "  Conversion : W3C DOM-> dom4j DOM err " ,
                  xmlReader.read(doc3c)  instanceof  Document, true  );
      }
      
     public   void  testCreate() throws  Exception{
          DocumentFactory factory  =  DocumentFactory.getInstance();
          doc  =  factory.createDocument();
         // root Create
          Element root  =  doc.addElement( " testElement " );
          assertNotNull( " is root Create err " ,root);
          
           Element author2  =  root.addElement(  " author "  )
              .addAttribute(  " name " ,  " Toby "  )
              .addAttribute(  " location " ,  " Germany "  )
              .addText(  " Tobias Rademacher "  );

            Element author1  =  root.addElement(  " author "  )
              .addAttribute(  " name " ,  " James "  )
              .addAttribute(  " location " ,  " UK "  )
              .addText(  " James Strachan "  );
            
             // Test Create 
             // use XPath ->jaxen-xxx.jar  
            assertEquals( " create Element author2 err " ,
                    doc.selectSingleNode( " /testElement/author[@name='Toby'] " ).getText()
                    , " Tobias Rademacher " );
            assertEquals( " create Element author1 err " ,
                    doc.selectSingleNode( " /testElement/author[@location='UK']/@name " ).getText()
                    , " James " );
    }



      public   void  testPrintingHTML() throws  Exception{
           String testSaveXml  =   " useDom4j/test/config/testHtml.html " ;
           
           testSaveXml  =  classPath + filese + testSaveXml;
          
           File file  =  getFile(testSaveXml);
            // Save file.html 
           HTMLWriter writer  =   new  HTMLWriter( new  FileOutputStream( file ));
           writer.write( new  SAXReader().read( clo.getResource(path) ));
           writer.flush();
     }
    
     public   void  testIterator(){
        Element root  =   this .doc.getRootElement();
        
         // Iterator
        Iterator elementIterator  =  root.elementIterator();
         while (elementIterator.hasNext()){
          Element element  =  (Element)elementIterator.next();
          assertNotNull( " not attr name " , element.selectSingleNode( " ./@name " ) );
          assertNotNull( " not attr location " , element.selectSingleNode( " ./@location " ) );
          assertNotNull( " not Text  " , element.selectSingleNode( " . " ).getText() );
        }
        
         // for -> ./XX
         for  (  int  i  =   0 , size  =  root.nodeCount(); i  <  size; i ++  ) {
            Node node  =  root.node(i);
             if  ( node  instanceof  Element ) {
              Element element  =  (Element)node;
              assertNotNull( " not attr name " , element.selectSingleNode( " ./@name " ) );
                assertNotNull( " not attr location " , element.selectSingleNode( " ./@location " ) );
                assertNotNull( " not Text  " , element.selectSingleNode( " . " ).getText() );
            }
        }
        
         // List 
        List elements  =  root.elements();
         int  size  =  elements.size() ;
         if  ( size  >   4  ) {
          elements.subList(  3 ,  4  ).clear();
          assertEquals( " List is not clear " ,size - elements.size() == 1 , true );
        }

    }
    
     /**  use test.xml test
         xpath -> /project/organization/
         <organization>
             <name>MetaStuff Ltd.</name>
             <url> http://sourceforge.net/projects/dom4j </url>
             <logo> http://sourceforge.net/sflogo.php?group_id=16035 </logo>
          </organization> 
          
          xpath -> /project/dependencies/dependency[groupId='msv']
            <dependency>
              <groupId>msv</groupId>
              <artifactId>xsdlib</artifactId>
              <version>20030807</version>
              <url> https://msv.dev.java.net/ </url>
            </dependency>
     */
     public   void  testXpath() throws  Exception{
        XPath xpathSelector  =  DocumentHelper.createXPath( " /project/organization/* " );
        Document docT  =   new  SAXReader().read( clo.getResourceAsStream(path) );
        List results  =  xpathSelector.selectNodes(docT);
         for  ( Iterator iter  =  results.iterator(); iter.hasNext(); ) {
          Element element  =  (Element) iter.next();
           if (element.getName().equals( " name " )){
              assertEquals( " name err " , element.getText().equals( " MetaStuff Ltd. " ), true );
          }
           if (element.getName().equals( " url " )){
              assertEquals( " url err " , element.getText().equals( " http://sourceforge.net/projects/dom4j " ), true );
          }
           if (element.getName().equals( " logo " )){
              assertEquals( " logo err " , element.getText().equals( " http://sourceforge.net/sflogo.php?group_id=16035 " ), true );
          }
        }
        
         //  select 
        String url  =  docT.valueOf(  " /project/dependencies/dependency[groupId='msv']/url "  );
        assertEquals( " Url err " , url.equals( " https://msv.dev.java.net/ " ), true );
        Number count  =  docT.numberValueOf(  " /project/dependencies/dependency[groupId='msv']/version "  );
        assertEquals( " Url err " , count.intValue() == 20030807 , true );
        
    }

    
     public   void  testVisitor(){
        Visitor visitor  =   new  VisitorSupport() {
             public   void  visit(Element element) {
              System.out.println(
                 " Entity name:  "   +  element.getName()   +   "  text : "   +  element.getText()
              );
            }
          };

          doc.accept( visitor );
    }

     //   element.clone ;  element.createCopy ;   
     public   void  testInsertElementAt()  throws  Exception{
        Element root  =   this .doc.getRootElement();
        Element oldElement  =  (Element)doc.selectSingleNode( " /testElement/author[@name='Toby'] " );
        Element newElement  =  (Element) oldElement.clone();
        List list  =  root.content();
        list.add( root.indexOf(oldElement) + 1 ,newElement );

     }
    
    
    
    
      public   void  testSave() throws  Exception{
           String testSaveXml  =   " useDom4j/test/config/testSave.xml " ;
           
           testSaveXml  =  classPath + filese + testSaveXml;
          
           File file  =  getFile(testSaveXml);
            // Save file.xml 
           XMLWriter writer  =   new  XMLWriter( new  FileOutputStream( file ));
           writer.write(doc);
           writer.flush();
     }

     
     
     private  File getFile(String testSaveXml)  throws  IOException {
        File file  =   null  ;
           URL url  =  clo.getResource(testSaveXml);
            if (url == null ){
               file  =   new  File(testSaveXml);
               file.createNewFile();
           } else {
               file  =   new  File(  url.getFile() );
           }
         return  file;
    }
    
    
}