JDOM读写XML文件实例

<?xml version="1.0" encoding="gb2312"?>
<messages>
<message id="1">
<title>11</title>
<content>
<name>lvpingyu</name>
<age>23</age>
</content>
<email>33</email>
</message>
<message id="2">
<title>44</title>
<content>
<name>lvpingyu</name>
<age>23</age>
</content>
<email>66</email>
</message>
</messages>

package test;

import java.io.FileInputStream;
import java.util.List;

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

public class MyJdom {
public static void main(String[] args) throws Exception {
SAXBuilder sb = new SAXBuilder();//建立构造器
String path="abc.xml";
Document doc = sb.build(new FileInputStream(path));//读入指定文件
Element root = doc.getRootElement();//获得根节点
List list = root.getChildren();//将根节点下的所有子节点放入List中
for (int i = 0; i < list.size(); i++) {
System.out.println("---------------------------");
Element item = (Element) list.get(i);//取得节点实例
String id = item.getAttribute("id").getValue();//取得属性值
System.out.println("id-->" + id);
Element sub = item.getChild("title");//取得当前节点的子节点
String text = sub.getText();//取得当前节点的值
System.out.println("Title-->" + text);
if (item.getChild("content").getChildren().size() > 0) {
Element sub2 = item.getChild("content").getChild("name");
String text2 = sub2.getText();
System.out.println("name-->" + text2);
}
Element sub3 = item.getChild("email");
String text3 = sub3.getText();
System.out.println("Email-->" + text3);

}
System.out.println("---------------------------");
}

}

package test;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

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

public class JavaXML {
public void buildXML() throws Exception {
String path = "company_list.xml";
// 创建根节点 list;
Element root = new Element("list");
//根节点添加到文档中；
Document Doc = new Document(root);
//	 此处 for 循环可替换成 遍历 数据库表的结果集操作;
for (int i = 0; i < 5; i++) {
// 创建子节点 company;
Element elements = new Element("company");
// 给 company 节点添加属性 id;
elements.setAttribute("id", "" + i);
// 给 company 节点添加子节点并赋值

// new Element("company_name")中的 "company_name"
//替换成表中相应字段，setText("name")中 "name 替换成表中记录值;
elements.addContent(new Element("company_name").setText("name" + i));
elements.addContent(new Element("company_email").setText("@" + i
+ ".com"));

// 给父节点list添加company子节点;
root.addContent(elements);
}
XMLOutputter XMLOut = new XMLOutputter();
// 输出company_list.xml文件；
XMLOut.output(Doc, new FileOutputStream(path));
}

public static void main(String[] args) {
JavaXML javaXML = new JavaXML();
try {
javaXML.buildXML();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}