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Thu, 05 Oct 2006 16:16:00 GMT

实际跟jdom 有相似的地方主要�?br />JDOM用SAXBuilder
DOM4J用SAXReader
形成doc 然后
输出的方式也不太一�?br />jdom用XMLOutput
生成格式
然后又xop.setput(doc,os)
把输入流和doc当作参数
�?br />dom4j则是
创徏一�?XMLWriter(os,format)
format是格�?br />然后�׃��写器书写(doc)
writer.writer(doc)

例如�Q�dom4j的code 为：(x��)

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class parsedom4j {

/**
* @param args
*/
public static void main(String[] args) {
  // TODO 自动生成�Ҏ(gu��)��存根
  parsedom4j j=new parsedom4j();
  j.delete();

}
public void update(){
   SAXReader parser=new SAXReader();
   String path="D:/Example10.xml";
   File file=new File(path);
         try {
    Document doc=parser.read(path);
   Element root=doc.getRootElement();
   I(y��ng)terator iter=root.elementIterator();
   while(iter.hasNext()){
    Element child=(Element)iter.next();
    I(y��ng)terator childchilds=child.elementIterator();
    boolean isCorrect=false;
    while(childchilds.hasNext()){
     Element childchild=(Element)childchilds.next();
     if(childchild.getName().equalsIgnoreCase("title")&&childchild.getTextTrim().equalsIgnoreCase("b")){
       isCorrect=true;
     }if(childchild.getName().equalsIgnoreCase("email")&&isCorrect)
     {
        childchild.setText("西安@163.com");
      }
    }
   }
   OutputFormat format=new OutputFormat();
   format.setEncoding("gb3212");
   format.setNewlines(true);
         OutputStream os=new FileOutputStream(path);
   XMLWriter writer=new XMLWriter(os,format);
   writer.write(doc);
   os.close();
   writer.close();


  } catch (MalformedURLException e) {
   // TODO 自动生成 catch �?br />   e.printStackTrace();
  } catch (Exception e) {
   // TODO 自动生成 catch �?br />   e.printStackTrace();
  }
}

public void delete(){
  Element de=null;
SAXReader reader=new SAXReader();
String path="D:/Example10.xml";
Document doc;
try {
  doc = reader.read(path);
  Element root=doc.getRootElement();
  List children=root.elements();
  for(int i=0;i   Element child=(Element)children.get(i);
   List childchilds=child.elements();
   for(int j=0;i   Element e=(Element)childchilds.get(i);
   if(e.getName().equalsIgnoreCase("email")){
    de=e;
    childchilds.remove(j);
   }
   }
  }
} catch (DocumentException e) {
  // TODO 自动生成 catch �?br />  e.printStackTrace();
}






}

public parsedom4j() {
super();
// TODO 自动生成构造函数存�?br /> }

}

开�?/a> 2006-10-06 00:16 发表评论

Thu, 05 Oct 2006 16:09:00 GMT

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

public class CreateJdomXml {
String root="messages";
    String child="message";
String[][] childitem={{"title","a"},{"content","aaa"},{"email","aaaaa"}};
/**
* @param args
*/
public CreateJdomXml(){

}
public static void main(String[] args) {
  // TODO 自动生成�Ҏ(gu��)��存根
  CreateJdomXml cj=new CreateJdomXml();
  cj.deletexml();

}

public void createxml(){
  Element roote=new Element(root);
  Element childe=new Element(child);
  childe.addAttribute("id", "A");
  for(int i=0;i   Element childchild=new Element(childitem[i][0]);
   childchild.setText(childitem[i][1]);
   childe.addContent(childchild);
  }
  roote.addContent(childe);
  Document doc=new Document(roote);
  String newfile="D:/NewCearteExample.xml";
  File file=new File(newfile);
  if(!file.exists()){
   try {
    file.createNewFile();
   } catch (IOException e) {
    // TODO 自动生成 catch �?br />    e.printStackTrace();
   }
  }
  OutputStream os=null;
  try {
   os=new FileOutputStream(file);
  } catch (FileNotFoundException e) {
   // TODO 自动生成 catch �?br />   e.printStackTrace();
  }
  XMLOutputter xop=new XMLOutputter();
  xop.setEncoding("gb2312");
  xop.setIndentSize(3);
  xop.setNewlines(true);
  xop.setSuppressDeclaration(false);
  try {
   xop.output(doc, os);
   os.close();

  } catch (IOException e) {
   // TODO 自动生成 catch �?br />   e.printStackTrace();
  }


}

public void updatexml(){
  I(y��ng)nputStream is=null;
  OutputStream os=null;
String path="D:/NewCearteExample.xml";
File file=new File(path);
try {
  is=new FileInputStream(file);
  SAXBuilder builder=new SAXBuilder();
  Document doc=builder.build(is);
  Element root=doc.getRootElement();
  List childrenlist=root.getChildren();
  Element child=(Element)childrenlist.get(0);
  Element childchild=new Element("desc");
  childchild.setText("person");
  child.addContent(childchild);

  os=new FileOutputStream(file);
  XMLOutputter xop=new XMLOutputter();
  xop.setNewlines(true);
  xop.setIndentSize(3);
  xop.setEncoding("gb2312");
  xop.output(doc,os);
  os.close();
  is.close();


} catch (Exception e) {
  // TODO 自动生成 catch �?br />  e.printStackTrace();
}


}

   public void deletexml(){
    InputStream is=null;
  OutputStream os=null;
String path="D:/NewCearteExample.xml";
File file=new File(path);
try{
is=new FileInputStream(file);
SAXBuilder builder=new SAXBuilder();
Document doc=builder.build(is);
Element root=doc.getRootElement();
List childlist=root.getChildren();
Element child=(Element)childlist.get(0);
List childrenlist=child.getChildren();
for(int i=0;i  Element childchild=(Element)childrenlist.get(i);
  if(childchild.getName().equalsIgnoreCase("desc")){
   childrenlist.remove(i);
  }
}
os=new FileOutputStream(file);
XMLOutputter xop=new XMLOutputter();
xop.setNewlines(true);
xop.setIndentSize(3);
xop.setEncoding("gb2312");
xop.output(doc,os);
os.close();
is.close();

}catch(Exception e)
{e.printStackTrace();
}
   }

}

开�?/a> 2006-10-06 00:09 发表评论

Mon, 25 Sep 2006 07:50:00 GMT

例如一个Example.xml文�g如下�Q?br />

      3
      0
      3
      5



      5
      0
      3
      5


      0
      0
      3
      3

     10
      10
      3
      3

我写的解析算法是�Q?br />先徏立一个shape的父�c?然后创徏Triangle ,Cricle,和Square的子�c�d��别��?但是子类有自��q��name属�?br />然后建立解析�c�coding如下�Q?br />import java.util.ArrayList;
import java.util.List;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;

public class ParserOne extends DefaultHandler {
Triangle tri;
Square   squ;
Circle   cir;
List trislist=new ArrayList();
List squslist=new ArrayList();
List cirslist=new ArrayList();
StringBuffer sb=new StringBuffer();
boolean triangle=false;
boolean square=false;
boolean circle=false;
@Override
public void startDocument() throws SAXException {
  // TODO 自动生成�Ҏ(gu��)��存根

}

@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
  // TODO 自动生成�Ҏ(gu��)��存根
if(qName.equals("Triangle")){
  tri=new Triangle();
  tri.name=attributes.getValue(0);
  trislist.add(tri);
  triangle=true;
}else if(qName.equals("Square")){
  squ=new Square();
  squ.name=attributes.getValue(0);
  squslist.add(squ);
  square=true;
}else if(qName.equals("Circle")){
  cir=new Circle();
  cir.name=attributes.getValue(0);
     cirslist.add(cir);
     circle=true;
}    sb.delete(0, sb.length());
}

@Override
public void characters(char[] ch, int start, int length) throws SAXException {
  // TODO 自动生成�Ҏ(gu��)��存根
  sb.append(ch,start,length);
}

@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
  // TODO 自动生成�Ҏ(gu��)��存根
if(triangle){
  if(qName.equals("x")){
     tri.x=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("y")){
     tri.y=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("height")){
     tri.height=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("width")){
        tri.width=Integer.parseInt(sb.toString().trim());
  }
}else if(square){
  if(qName.equals("x")){
       squ.x=Integer.parseInt(sb.toString().trim());
   }else if(qName.equals("y")){
    squ.y=Integer.parseInt(sb.toString().trim());
   }else if(qName.equals("height")){
    squ.height=Integer.parseInt(sb.toString().trim());
   }else if(qName.equals("width")){
    squ.width=Integer.parseInt(sb.toString().trim());
   }
}else if(circle){
  if(qName.equals("x")){
      cir.x=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("y")){
   cir.y=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("height")){
   cir.height=Integer.parseInt(sb.toString().trim());
  }else if(qName.equals("width")){
   cir.width=Integer.parseInt(sb.toString().trim());
  }
}
if(qName.equals("Triangle")){
    triangle=false;
    }
    if(qName.equals("Square")){
    square=false;
    }
    if(qName.equals("Circle")){
    circle=false;
    }
}

    @Override
public void endDocument() throws SAXException {
  // TODO 自动生成�Ҏ(gu��)��存根

}
    public static void main(String[] args){
    ParserOne par=new ParserOne();
    try {
//通过XML阅读工厂建立阅读�?解析�? �q�里依托xerces.jar 和里面的SAXparser 路径 (使用SAX API解析�?
   XMLReader parser=XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
//有解析器建立拦截�?本例中把本类讄��成�ؓ(f��)拦截器，也可以设�|�别的类)
   parser.setContentHandler(par);
//解析器解�?路径)
   parser.parse("D:/Example.xml");
  } catch (Exception e) {
   // TODO 自动生成 catch �?br />   e.printStackTrace();
  }
  for(int i=0;i   Triangle tr=(Triangle)par.trislist.get(i);
   tr.print(System.out);
  }
  for(int i=0;i   Square sq=(Square)par.squslist.get(i);
   sq.print(System.out);
  }
  for(int i=0;i   Circle ci=(Circle)par.cirslist.get(i);
   ci.print(System.out);
  }

    }

}

解析 �l�果如下�Q?br />name:tri1
x:3
y:0
height:3
width:5
name:tri2
x:5
y:0
height:3
width:5
name:sq1
x:0
y:0
height:3
width:3
name:circ1
x:10
y:10
height:3
width:3

开�?/a> 2006-09-25 15:50 发表评论