JDOM读写XML文件实例

需要的jar包 jdom.jar

下载地址：

1.读取xml文件中的元素

a. abc.xml

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

lvpingyu 23 33 lvpingyu 23 66

b.如何读取 代码如下：

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.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("---------------------------"); } }

2.生成xml文件

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();
        }

    }

}

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(); } } }

可参考的资料：参考资料:
    JDOM V1.0 API在线参考手册()
    JDOM V1.0下载()
    JDOM处理XML快速上手
(http://kingwong.blogdriver.com/kingwong/291878.html)




*注：本文转自http://blog.csdn.net/java_cxrs/article/details/5474815