求教高人如何用java写xml??

这是删除接点的例子import java.awt.*;
import java.awt.event.*;
import org.apache.xerces.parsers.DOMParser;
import org.xml.sax.SAXException;
import  java.awt.*;
import  java.awt.event.*;
import  org.apache.xerces.parsers.DOMParser;
import  org.xml.sax.SAXException;
import  org.w3c.dom.Document;
import  org.w3c.dom.Node;
import  org.w3c.dom.NodeList;
import  java.io.IOException;
import  org.w3c.dom.NamedNodeMap;

import  java.io.*;
import  org.w3c.dom.*;
import  org.apache.xerces.dom.*;
import  org.apache.xml.serialize.*;
import  org.apache.xerces.parsers.DOMParser;
import  javax.xml.parsers.DocumentBuilder;
import  javax.xml.parsers.DocumentBuilderFactory;

class  TjNode  extends  Frame  {

    public  static  void  main(String  args[])  {
       DocumentBuilder  parser;
       DocumentBuilderFactory  factory  =  DocumentBuilderFactory.newInstance();

       try{

           parser  =  factory.newDocumentBuilder();
           Document  doc  =  parser.parse("system_file.xml");
           NodeList  newKey=doc.getElementsByTagName("Name");
           for(int  i=0;i<newKey.getLength();i++){
            Node  aNode=newKey.item(i);
            String  newString=  aNode.getFirstChild().getNodeValue().toString();
            System.out.println(newString);
            if(newString.equals("dfg")){
             aNode.getParentNode().removeChild(aNode);
            }
          }
           File  _outputFile=new  File("system_file.xml");
           OutputFormat  outputFormat=new  OutputFormat("XML","gb2312",true);
           FileWriter  fileWriter=new  FileWriter(_outputFile);
           XMLSerializer  xmlSerializer=new  XMLSerializer(fileWriter,outputFormat);
           xmlSerializer.asDOMSerializer();
           xmlSerializer.serialize(doc.getDocumentElement());
       }catch  (Exception  evc){
           System.out.println(evc.toString());
       }
    }
}这是更新的例子DocumentBuilder parser;
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    try{
      parser = factory.newDocumentBuilder();
      Document doc = parser.parse("system_file.xml");
      Element Name=doc.createElement("Name");
      Name.setAttribute("savepath",pathText.getText());
      Name.setAttribute("savesystem",system_String);
      Name.appendChild(doc.createTextNode(treenameText.getText()));

      doc.getDocumentElement().appendChild(Name);
      File _outputFile=new File("system_file.xml");
      OutputFormat outputFormat=new OutputFormat("XML","gb2312",true);
      FileWriter fileWriter=new FileWriter(_outputFile);
      XMLSerializer xmlSerializer=new XMLSerializer(
          fileWriter,outputFormat);
      xmlSerializer.asDOMSerializer();
      xmlSerializer.serialize(doc.getDocumentElement());
      getnewtreeNode=treenameText.getText();
    }catch (Exception evc){
      System.out.println(evc.toString());
    }写xml一样看看就可以了。这些包在jbuilder内都有。
或者去http://jakarta.apache.org下载这个例子是把xml文件变成javabeanimport org.apache.xerces.parsers.SAXParser;
import org.xml.sax.InputSource;
import java.io.FileInputStream;
import java.util.Hashtable;
import java.util.Enumeration;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.Attributes;class Employee{

private String id="";
private Profile profile=null;

public void setId(String newId){
id=newId;
}

public String getId(){
return id;
}

public void setProfile(Profile newProfile){
profile=newProfile;
}

public String toString(){
return "Employee: "+id+"\n"
+profile.getFirstName()+"\n"
+profile.getLastName();
}
}class Profile{

String firstName="";
String lastName="";

public void setFirstName(String newFirstName){
firstName=newFirstName;
}

public String getFirstName(){
return firstName;
}

public void setLastName(String newLastName){
lastName=newLastName;
}
public String getLastName(){
return lastName;
}
}

class EmployeeBuilder extends DefaultHandler{

private Hashtable employeeList=null;
private Employee employee=null;
private Profile profile=null;

public void startDocument(){

employeeList=new Hashtable();
}

public void endElement(String nameSpaceURI,String name,
String qName){

if(name.equals("employee")){
employeeList.put(employee.getId(),employee);
}
}

public void startElement(String namespaceURI,String name,
String qName,Attributes atts){

if(name.equals("employee")){
employee=new Employee();
employee.setId(atts.getValue("id"));
}

if(name.equals("profile")){
profile=new Profile();

profile.setFirstName(atts.getValue("firstName"));
profile.setLastName(atts.getValue("lastName"));
employee.setProfile(profile);
}
}

public Hashtable getEmployess(){
return employeeList;
}
}class SAXEmployeeExample1{

public static void main(String args[]){

EmployeeBuilder eBuilder=new EmployeeBuilder();

try{
SAXParser saxParser=new SAXParser();
saxParser.setContentHandler(eBuilder);
saxParser.parse(new InputSource(
new FileInputStream("employees.xml")));
Hashtable employees=eBuilder.getEmployess();
Enumeration emps=employees.elements();
while(emps.hasMoreElements()){
Employee employee=(Employee)emps.nextElement();
System.out.println(employee);
}
}catch(Exception ex){
System.out.println(ex);
}
}
}

xml文件<?xml version="1.0"?>
<employees>
<employee id="A124-567">
<profile firstName="Joe" lastName="Coder"/>
</employee>
<employee id="A1234-789">
<profile firstName="Danny" lastName="shi"/>
</employee>
</employees>
由于不是很清楚你的想法,所有多写了点.

dom解析，用
try{
      DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
      DocumentBuilder builder=factory.newDocumentBuilder();
      doc=builder.newDocument();

      //获得TopicID
      int  i  = TaminoWrapper.GetUniqueID(dbURL);
      TopicID=String.valueOf(i);
      ParentID=TopicID;      Element root=doc.createElement("TOPIC");
      Element Issue1=doc.createElement("Issue");      Element RootID1=doc.createElement("RootID");
      RootID1.appendChild(doc.createTextNode("100"));
      Issue1.appendChild(RootID1);
      Element ParentID1=doc.createElement("ParentID");
      ParentID1.appendChild(doc.createTextNode(ParentID));
      Issue1.appendChild(ParentID1);      Element TopicName1=doc.createElement("TopicName");
      TopicName1.appendChild(doc.createTextNode(TopicName));
      Issue1.appendChild(TopicName1);      Element AuthorName1=doc.createElement("AuthorName");
      AuthorName1.appendChild(doc.createTextNode(AuthorName));
      Issue1.appendChild(AuthorName1);

      Element TopicID1=doc.createElement("TopicID");
      TopicID1.appendChild(doc.createTextNode(TopicID));
      Issue1.appendChild(TopicID1);
      Element AuthorID1=doc.createElement("AuthorID");
      AuthorID1.appendChild(doc.createTextNode("50"));
      Issue1.appendChild(AuthorID1);      Element content1=doc.createElement("content");
      content1.appendChild(doc.createTextNode(content));
      Issue1.appendChild(content1);      Element upDateTime1=doc.createElement("upDateTime");
      upDateTime1.appendChild(doc.createTextNode(upDateTime));
      Issue1.appendChild(upDateTime1);
       Element ReplyTimes1=doc.createElement("ReplyTimes");
      ReplyTimes1.appendChild(doc.createTextNode("0"));
      Issue1.appendChild(ReplyTimes1);      Element Mark1=doc.createElement("Mark");
      Mark1.appendChild(doc.createTextNode(Mark));
      Issue1.appendChild(Mark1);      Element BBSname1=doc.createElement("BBSname");
      BBSname1.appendChild(doc.createTextNode(BBSname));
      Issue1.appendChild(BBSname1);

     Element ViewTimes1=doc.createElement("ViewTimes");
      ViewTimes1.appendChild(doc.createTextNode("0"));
      Issue1.appendChild(ViewTimes1);
      Element SignName1=doc.createElement("SignName");
      String Value=getUser.getUser("SignName",AuthorName);
      SignName1.appendChild(doc.createTextNode(Value));
      Issue1.appendChild(SignName1);      Element Photo1=doc.createElement("Photo");
      Value=getUser.getUser("Photo",AuthorName);
      Photo1.appendChild(doc.createTextNode(Value));
      Issue1.appendChild(Photo1);

      Element NickName1=doc.createElement("NickName");
      Value=getUser.getUser("NickName",AuthorName);
      NickName1.appendChild(doc.createTextNode(Value));
      Issue1.appendChild(NickName1);      Element Rank1=doc.createElement("Rank");
      Value=getUser.getUser("Rank",AuthorName);
      Rank1.appendChild(doc.createTextNode(Value));
      Issue1.appendChild(Rank1);      Element BBSID1=doc.createElement("BBSID");
      BBSID1.appendChild(doc.createTextNode(BBSID));
      Issue1.appendChild(BBSID1);

      Element SortTime1=doc.createElement("SortTime");
      SortTime1.appendChild(doc.createTextNode(SortTime));
      Issue1.appendChild(SortTime1);      root.appendChild(Issue1);
      doc.appendChild(root);
      try{
        TaminoWrapper.Process(dbURL,doc,"BBS_topic");
      }
      catch(Exception ee)
          {out.println("提交失败");return;
      }    }
  }
    catch(Exception ex)
        {out.println("用户名错误");

    }
类似我这样的代码可以把xml树组在内存里

先谢谢各位但是我的运行环境是jdk1.3.1
不知道可以运行吗
还有那些个包从什么地方可以获得(jdk1.3.1里边有吗)？？请多多指教

找本书看看。关于JAVA&XML的书不少。
还有这里：http://www-900.ibm.com/developerWorks/cn/education/xml/xmljava/tutorial/xmljava-menu.html

用JDom操作文件就不用用io的write写tag标记，不过存盘还要自己干的

我尝试着写了一个
还可以
但是为什么我用setAttribute()函数加的属性
它要按照字母大小排序呢|?
如何能叫它不排

****************************************************
但是我的运行环境是jdk1.3.1
不知道可以运行吗
还有那些个包从什么地方可以获得(jdk1.3.1里边有吗)？？
****************************************************是可以运行的就是添加相应的包就可以了。
到这里可以下载 Xerces-J http://xml.apache.org/dist/xerces-j;这是xml的解析器，上面需要的包和一些文档，例子。×××××××××××××××××××
我尝试着写了一个
还可以
但是为什么我用setAttribute()函数加的属性
它要按照字母大小排序呢|?
如何能叫它不排
×××××××××××××××××××××××××这个是什么意思我不是很清楚。。如果还有问题在发信息给我。
http://xml.apache.org/xalan-j/downloads.html xalan-j（在是xml的样式（xslt）；还有JAXP;如果你安装了JBuilder7的，这些包在\JBuilder7\lib下；

两位前辈：
写xml目前已经不是我的问题了,关于那个包,我同学给我提供了jbuild下的一个叫xer**的包
用dom方法也把xml写出来了，但是现在我写的这个xml有个问题，就是我加属性的顺序和我在ie下显示的顺序不一致
例子:
******
Element root=doc.createElement("root");
root.setAttribute("c","3");//先加入的是c
root.setAttribute("a","1");//再是a
root.setAttribute("d","4");//再是d
root.setAttribute("b","2");//最后是b
****假设生成a.xml文件
前辈们:我预期想得到的是这样的文件
<root c='3',a='1',d='4',b='2'/>
即按照我加入属性的先后顺序显示
然而
ie下显示却是这样
<root a='1',b='2',c='3',d='4'/>
这样的话不是我预期要的东东
希望大家给个解决方案

用JDOM来操作XML：(要加入一个是JDOM包到 classpath中)
package demo.testjdom;import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Iterator;
import java.util.List;public class CDCatalog {    File file = null;
    Document document = null;    public static void main(String args[]) {
        if (args.length > 0) {
            String xmlFile = args[0];
            CDCatalog catalog = new CDCatalog(xmlFile);            String action = args[1];            try {
                if (args.length == 5) {
                    String title = args[2];
                    String artist = args[3];
                    String label = args[4];
                    if (action.equals("add")) {
                        catalog.addCD(title, artist,
                            label);
                    } else if (action.equals("delete")) {
                        catalog.deleteCD(title,
                            artist, label);
                    }
                }                // save the changed catalog
                catalog.save();
            } catch (Exception e) {
                e.printStackTrace(System.err);
            }
        }
    }    public CDCatalog(String fileName) {
        try {
            file = new File(fileName);
            if (file.exists()) {
                loadDocument(file);
            } else {
                createDocument();
            }
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
    }    private void loadDocument(File file)
    throws JDOMException {
        SAXBuilder builder = new SAXBuilder();
        document = builder.build(file);
    }    private void createDocument() {
        Element root = new Element("CDCatalog");
        document = new Document(root);
    }    public void addCD(String title, String artist,
        String label) {
        Element cd = new Element("CD");
        cd.setAttribute("title",title);
        cd.setAttribute("artist",artist);
        cd.setAttribute("label",label);        document.getRootElement().getChildren().add(cd);
    }    public void deleteCD(String title, String artist,
        String label) {
        List cds = document.getRootElement().getChildren();
        for (int i = 0; i < cds.size(); i++) {
            Element next = (Element)cds.get(i);
            if (next.getAttribute("title").getValue()
                .equals(title) &&
                next.getAttribute("artist").getValue()
                .equals(artist) &&
                next.getAttribute("label").getValue()
                .equals(label)) {
                next.detach();
            }
        }
    }    public void Save() throws IOException {
        XMLOutputter outputter = new XMLOutputter();
        FileWriter writer = new FileWriter(file);
        outputter.output(document,writer);
        writer.close();
    }
}

调试易

求教高人如何用java写xml??

解决方案 »