java XML，

java XML，

package com.itztc.demo;

import javax.xml.transform.dom.*;
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import org.w3c.dom.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.dom.*;

import java.util.*;
import java.io.*;

public class DomReadDR {
DocumentBuilderFactory factory;
DocumentBuilder builder;
Document doc;

public DomReadDR() throws Exception {
factory = DocumentBuilderFactory.newInstance();
builder = factory.newDocumentBuilder();
// Return:Document Method:parse(File f)
// 将给定文件的内容解析为一个 XML 文档，并且返回一个新的 DOM Document 对象
doc = builder.parse("test.xml");
}

public void Read() throws Exception {

doc.normalize();

NodeList links = doc.getElementsByTagName("song");
for (int i = 0; i < links.getLength(); i++) {
Element link = (Element) links.item(i);
System.out.println(link.getElementsByTagName("name").item(0)
.getFirstChild().getNodeValue());
System.out.println(link.getElementsByTagName("music-by").item(0)
.getFirstChild().getNodeValue());
}
}

//替换节点
public int replaceNode(String nodeID, String nodeValue) {

doc.normalize();
NodeList links = doc.getElementsByTagName("song");
//查找要替换的Node
boolean blfindNode = false;
Element link = null;
for (int i = 0; i < links.getLength(); i++) {
link = (Element) links.item(i);
if ((link.getElementsByTagName("mId").item(0).getFirstChild()
.getNodeValue()).trim().equals(nodeID)) {
blfindNode = true;
link.getElementsByTagName("music-by").item(0).getFirstChild()
.setNodeValue(nodeValue);//替换node的内容
break;
}
}
if (!blfindNode) {
return 1;//没有找到合适的节点
}
try {
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
//设置输出的encoding为改变gb2312
transformer.setOutputProperty("encoding", "gb2312");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult("test.xml");
transformer.transform(source, result);
} catch (javax.xml.transform.TransformerConfigurationException e) {
e.printStackTrace();
System.out.println(e.getMessage());
return 3;//写文件错误
} catch (javax.xml.transform.TransformerException ex) {
ex.printStackTrace();
return 3;
}
return 0;//替换成功
}

//删除节点
public int deleteNode(String nodeID) {

doc.normalize();
NodeList links = doc.getElementsByTagName("song");
//查找要替换的Node
boolean blfindNode = false;
Element link = null;
for (int i = 0; i < links.getLength(); i++) {
link = (Element) links.item(i);
if ((link.getElementsByTagName("mId").item(0).getFirstChild()
.getNodeValue()).trim().equals(nodeID)) {
blfindNode = true;
try {
link.getParentNode().removeChild(link);
} catch (DOMException e) {
e.printStackTrace();
return 2;//Dom错误
}
break;
}
}

if (!blfindNode) {
return 1;//没有找到合适的节点
}
try {
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
//设置输出的encoding为改变gb2312

transformer.setOutputProperty("encoding", "gb2312");
DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult("test.xml");
transformer.transform(source, result);
} catch (javax.xml.transform.TransformerConfigurationException e) {
e.printStackTrace();
System.out.println(e.getMessage());
return 3;//写文件错误
} catch (javax.xml.transform.TransformerException ex) {
ex.printStackTrace();
return 3;
}
return 0;//替换成功
}

//添加节点
public void addNode(String mId, String name, String musicby) {
Text textseg;
Element link = doc.createElement("song");

Element emId = doc.createElement("mId");
textseg = doc.createTextNode(mId);
emId.appendChild(textseg);
link.appendChild(emId);

Element ename = doc.createElement("name");
textseg = doc.createTextNode(name);
ename.appendChild(textseg);
link.appendChild(ename);

Element emusicby = doc.createElement("music-by");
textseg = doc.createTextNode(musicby);
emusicby.appendChild(textseg);
link.appendChild(emusicby);

Element root = doc.getDocumentElement();
root.normalize();
root.appendChild(link);

System.out.println(doc.getDoctype());
try {

TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
//设置输出的encoding为改变gb2312

transformer.setOutputProperty("encoding", "gb2312");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult("test.xml");
transformer.transform(source, result);
} catch (javax.xml.transform.TransformerConfigurationException e) {
e.printStackTrace();
System.out.println(e.getMessage());
} catch (javax.xml.transform.TransformerException ex) {
ex.printStackTrace();
}
}

public static void main(String[] args) {
try {
DomReadDR dr = new DomReadDR();
dr.Read();
//dr.addNode("5","卡本特1","yestodayfdgdrtyrtyrtyrtyfgdfgdfgdfg once more");
System.out.println(dr.replaceNode("5", "天上人间第死的克己复礼亏损大家法律亏损代理费"));
System.out.println(dr.deleteNode("1"));
} catch (Exception e) {
System.out.println(e.getMessage());
}
}

}