JDom、XPath实战（二）——删除节点

keywords: JDom、XPath、delete node

1. sample xml file:
<?xml version="1.0" encoding="utf-8"?>
<student info>
 <student id="01">
  <name>zhangsan</name>
  <Tel>020-87072002</Tel>
 </student>
 <student id="02">
  <name>lisi</name>
  <Tel>020-87072002</Tel>
 </student>
</student info>
Save this xml as sample.xml.

2. Delete a selected node of xml:

import java.io.FileOutputStream;
import java.util.Iterator;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;
import org.jdom.xpath.XPath;
public class DelNode{  
        public static void main(String[] args) throws Exception {
                SAXBuilder sb = new SAXBuilder();
                Document doc = sb.build("sample.xml");
                Element root = doc.getRootElement();
                
                XPath xpath=XPath.newInstance("/student info/student[@id='02']");
                Element anode=(Element)xpath.selectSingleNode(doc);
                anode.getParentElement().removeContent(anode);

                Format format = Format.getPrettyFormat();
                format.setEncoding("utf-8");
                format.setIndent("  ");
                XMLOutputter outputter = new XMLOutputter(format);
                FileOutputStream fo = new FileOutputStream("sample.xml");
                outputter.output(doc, fo);
                }
}