xml文档解析

XML文档解析：

   <?xml version="1.0" encoding="UTF-8" ?> 声明

-  <books>                       根元素

-   <book email="[e-mail]">   子元素

    <name>zhang</name>            属性

    <price>60.0</price>

  </book>

 </books>

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import java.io.FileOutputStream;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

public class TestJDom {
 public static void main(String[] args) {
  String filePath = "lib.xml";
  try{
   SAXBuilder sax = new SAXBuilder();//创建一个Sa
   Document doc = sax.build(filePath);//得到Document对应xml
   Element el = doc.getRootElement();//得到根节点,对应books
   List<Element> list = el.getChildren("book");//得到book节点集
      for(Element book : list){//取出所有的book     

        //取属性,并修改
       String email = book.getAttributeValue("email");
       System.out.println(email);
       book.setAttribute("email","[e-mail]");
       //取子节点,并修改
       String name = book.getChildTextTrim("name");
       System.out.println(name);
       Element ele = book.getChild("name");
       ele.setText("zhang");
      }
      //输出修改后的结果
      XMLOutputter out = new XMLOutputter();
      out.output(doc,new FileOutputStream(filePath));
  }catch(Exception ee){
   ee.printStackTrace();
  }
 }

}