解析xml文件有两种方式，一种是利用Dom去解析，这种方式写起代码比较麻烦，对于刚入手的程序员来说比较容易出问题；第二种就是使用Dom4j包去解析

在要使用Dom4j包的时候，肯定要先引入包

复制代码 代码如下:

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.Writer;

import java.util.Iterator;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

/**

* @author Icer

*/

public class Dom4jDemo{

/**

*

* @param fileName 生成的xml文件名

* @param txtName 包含的对账文件txt文件名

*/

public void createXml(String fileName,String txtName) {

Document document = DocumentHelper.createDocument();

Element root = document.addElement("root");

Element head = root.addElement("head");

Element type = head.addAttribute("type", "0");

Element code = head.addAttribute("code", "3003");

Element yhlb = head.addElement("yhlb");

yhlb.setText("01");

Element username = head.addElement("username");

username.setText("gsyh");

Element password = head.addElement("password");

password.setText("zheshimima");

Element body = root.addElement("body");

Element data = body.addElement("data");

Element dzwjm = data.addElement("dzwjm");

dzwjm.setText(txtName);

try {

//写入文件

Writer fileWriter = new FileWriter(fileName);

OutputFormat format = OutputFormat.createPrettyPrint();

XMLWriter xmlWriter = new XMLWriter(fileWriter,format);

xmlWriter.write(document);

xmlWriter.close();

} catch (IOException e) {

System.out.println(e.getMessage());

}

}

/**

*

* @param fileName 要解析的文件名

* @return 解析xml文件得到的需要对账的文件名

*/

public String parserXml(String fileName) {

String findFileName = "";

File inputXml = new File(fileName);

SAXReader saxReader = new SAXReader();

try {

Document document = saxReader.read(inputXml);

Element root = document.getRootElement();

for(Iterator i = root.elementIterator();i.hasNext();){

Element head = (Element) i.next();

for(Iterator j = head.elementIterator();j.hasNext();){

Element elem = (Element) j.next();

System.out.println(elem.getName()+":"+elem.getText());

for(Iterator k=elem.elementIterator();k.hasNext();){

Element last = (Element) k.next();

System.out.println(last.getName()+":"+last.getText());

findFileName = last.getText();

}

}

}

} catch (DocumentException e) {

System.out.println(e.getMessage()+"hello");

}

System.out.println("dom4j parserXml");

return findFileName;

}

/**

* 测试main方法

* @param args

*/

public static void main(String[] args){

Dom4jDemo demo = new Dom4jDemo();

demo.createXml("D://request.xml","test.txt");

demo.parserXml("e://request.xml");

}