import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.List;

import org.jdom2.Attribute;

import org.jdom2.Document;

import org.jdom2.Element;

import org.jdom2.JDOMException;

import org.jdom2.input.SAXBuilder;

import org.jdom2.output.XMLOutputter;

/**

* JDom读写xml

* @author whwang

*/

public class TestJDom {

public static void main(String[] args) {

read();

write();

}

public static void read() {

try {

boolean validate = false;

SAXBuilder builder = new SAXBuilder(validate);

InputStream in = TestJDom.class.getClassLoader().getResourceAsStream("university.xml");

Document doc = builder.build(in);

// 获取根节点 <university>

Element root = doc.getRootElement();

readNode(root, "");

} catch (JDOMException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

@SuppressWarnings("unchecked")

public static void readNode(Element root, String prefix) {

if (root == null) return;

// 获取属性

List<Attribute> attrs = root.getAttributes();

if (attrs != null && attrs.size() > 0) {

System.err.print(prefix);

for (Attribute attr : attrs) {

System.err.print(attr.getValue() + " ");

}

System.err.println();

}

// 获取他的子节点

List<Element> childNodes = root.getChildren();

prefix += "\t";

for (Element e : childNodes) {

readNode(e, prefix);

}

}

public static void write() {

boolean validate = false;

try {

SAXBuilder builder = new SAXBuilder(validate);

InputStream in = TestJDom.class.getClassLoader().getResourceAsStream("university.xml");

Document doc = builder.build(in);

// 获取根节点 <university>

Element root = doc.getRootElement();

// 修改属性

root.setAttribute("name", "tsu");

// 删除

boolean isRemoved = root.removeChildren("college");

System.err.println(isRemoved);

// 新增

Element newCollege = new Element("college");

newCollege.setAttribute("name", "new_college");

Element newClass = new Element("class");

newClass.setAttribute("name", "ccccc");

newCollege.addContent(newClass);

root.addContent(newCollege);

XMLOutputter out = new XMLOutputter();

File file = new File("src/jdom-modify.xml");

if (file.exists()) {

file.delete();

}

file.createNewFile();

FileOutputStream fos = new FileOutputStream(file);

out.output(doc, fos);

} catch (JDOMException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}