读写xml笔记

读写xml

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.util.Iterator;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.Node;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

public class Testreadxml {

public static String getClasspath() {

return XmlParser. class .getClass().getResource( "/" ).toString();

}

public static void ff() {

File f2 = new File(XmlParser. class .getResource( "" ).getPath());

System. out .println(f2);

}

public static void main(String[] args) {

try {

SAXReader reader = new SAXReader();

String xmlPath = System.getProperty( "user.dir" ) + "\\src\\test\\java\\test.xml" ;

File file = new File(xmlPath);

if (file.exists()) {

Document document = reader.read(file);

Element root = document.getRootElement();

// 根据节点名获取节点

System. out .println(root.element( "login" ).getTextTrim());

// 遍历节点

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

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

System. out .println(element.asXML());

}

// 根据xpath根据节点名，节点属性查找指定的节点

System. out .println( "----------------------获取指定节点的值----------------------------------" );

List<Node> node1 =root.selectNodes( "//p[@id='hehe']" );

for (Node n : node1) {

System. out .println(n.getName());

System. out .println(n.getText());

}

System. out .println( "----------------------精确查找----------------------------------" );

// 精确查找

List<Node> node2 =root.selectNodes( "//div/p[@id='hi']" );

for (Node n : node2) {

System. out .println(n.getName());

System. out .println(n.getText());

}

//hh为xml节点名

Element hh = root.element( "hh" );

System. out .println( "---------------------获取父节点的名字-----------------------" );

// 获取父节点

System. out .println(hh.getParent().getName());

// 设置节点的值

hh.setText( "21" );

System. out .println(hh.getText());

// 写入文件

OutputFormat format = OutputFormat.createPrettyPrint();

format.setEncoding( "utf-8" );

XMLWriter writer = new XMLWriter( new FileWriter(xmlPath),format);

writer.write(document);

writer.close();

/*

* //获取子节点 System.out.println(hh.getNodeType());

* System.out.println(hh.getData());

* System.out.println(hh.getName());

* System.out.println(hh.getText());

* System.out.println(hh.getTextTrim()); hh.setText("21");

* System.out.println(hh.getTextTrim());

*/

}

} catch (DocumentException e) {

e.printstacktrace();

} catch (IOException e) {

e.printstacktrace();

}

}

}

//参考网址:http://berdy.iteye.com/blog/807883

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