java dom4j写入XML

引用的两个jar包

dom4j-1.6.1.jar

jaxen.jar

//=========================代码

import java.io.FileWriter;
import java.util.List;

import org.dom4j.*;
import org.dom4j.io.*;

public class TestDom4 {
public static void main(String[] args) {

Test();
}

public static void Test() {
String fileName = System.getProperty("user.dir")+ "\LoaneeProduct.xml"; // 当前路径下的demo.xml

try {
SAXReader reader = new SAXReader();
Document doc = reader.read(fileName); // 加载xml文件

List peoples = null;

Element products = null;
try {
products = (Element) doc.selectSingleNode("./products"); // 选择所有具有name属性的节点(即demo.xml中的所有card节点)
} catch (Exception ex) {
System.out.println("异常信息：" + ex);
}

products.addElement("product").addAttribute("type", "cp");
// .addText("第六个产品");

Element a = (Element) products
.selectSingleNode("(//product)[last()]");
a.addElement("id").addAttribute("type", "3").addText("222");
a.addElement("name").addAttribute("type", "3").addText("第六个产品");
// Node node = doc.selectSingleNode("(//question)[last()]/@id");
/*
* products.addElement("email").addAttribute("type",
* "私人").addCDATA("private@some-domain.com"); //设置CDATA内容
*/

// 将上述改动保存到文件demo2.xml
FileWriter fileWriter = new FileWriter(
System.getProperty("user.dir") + "\LoaneeProduct.xml");

OutputFormat format = OutputFormat.createPrettyPrint(); // 设置美观的缩进格式，便于阅读
format.setEncoding("gb2312"); // 设置文本格式
// format = OutputFormat.createCompactFormat();//设置紧凑格式（消除多余空格），便于下载
XMLWriter writer = new XMLWriter(System.out, format);
writer.setWriter(fileWriter);
writer.write(doc);
writer.close();

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

}
}

 

//===========================XML  结构

<?xml version="1.0" encoding="gb2312"?>

<products> 
<product> 
<id>78</id> 
<name>悟能月付3.0</name> 
</product> 
<product> 
<id>220</id> 
<name>东方步云</name> 
</product> 
<product> 
<id>35</id> 
<name>畜牧贷</name> 
</product> 
<product> 
<id>176</id> 
<name>瑞恩传媒</name> 
</product> 
<product> 
<id>199</id> 
<name>借东风-凯琦</name> 
</product> 
<product type="cp"> 
<id type="3">222</id> 
<name type="3">第六个产品</name> 
</product> 
<product type="cp">
<id type="3">222</id>
<name type="3">第六个产品</name>
</product>
</products>