XML---JDOM基本操作

感觉还是用java操作起来比较方便
用jdom做对xml文件的读取操作
Student.java

public class Student {
	
	private String num;
	private String name;
	private String age;
	private String sex;

setter...
getter...

读取

public static Document doc;
File xmlFile = new File("E:\\xmltest.xml");
/**
	 * 读取一个XML文件，遍历其节点，将每一个节点的属性保存到实体中
	 * @author SavageGarden
	 * @param file
	 * @return
	 */
	public static ArrayList getEntityListByXmlFile(File file) {
		ArrayList students = new ArrayList();
		SAXBuilder sb = new SAXBuilder(); 
		try {
			doc = sb.build(file);
			Element root = doc.getRootElement();
			List list = root.getChildren("Student");
			
			for(int i = 0; i < list.size(); i++){
				Element xmlStudent = (Element)list.get(i);
				Student javaStudent= new Student();
				
				javaStudent.setNum(xmlStudent.getAttributeValue("num"));
				javaStudent.setName(xmlStudent.getAttributeValue("name"));
				javaStudent.setAge(xmlStudent.getAttributeValue("age"));
				javaStudent.setSex(xmlStudent.getAttributeValue("sex"));
				
				students.add(javaStudent);
			}
		} catch (JDOMException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return students;
	}
	/**
	 * 输出实体的属性值
	 * @author SavageGarden
	 * @param students
	 */
	public static void printEntity(ArrayList students) {
		for (int i = 0; i < students.size(); i++) {
			Student student = (Student)students.get(i);
			System.out.println("编号："+student.getNum()+"--姓名："+student.getName()+"--年龄："+student.getAge()+"--性别："+student.getSex());
		}
	}

添加内容到XML文件

/**
	 * 将实体属性添加到XML中
	 * @author SavageGarden
	 * @param student
	 * @param document
	 * @return
	 */
	public static Document addEntityToXML(Student student,Document document) {
		Element root = document.getRootElement();
		Element xmlStudent = new Element("Student");
		if(xmlStudent != null) {
			xmlStudent.setAttribute("num", student.getNum());
			xmlStudent.setAttribute("name", student.getName());
			xmlStudent.setAttribute("age", student.getAge());
			xmlStudent.setAttribute("sex", student.getSex());
			root.addContent(xmlStudent);
		}
		return document;
	}

将内容按照指定编码输出

/**
     * 将生成的XML根据指定的编码写到指定文件
     * @author SavageGarden
     * @param document
     * @param file
     */
    public static void outXMLToFile(Document document,File file,String charsetName){
    	XMLOutputter xmlOut = new XMLOutputter("", true, charsetName);
    	FileOutputStream fos = null;
    	
    	try {
			fos = new FileOutputStream(file);
			xmlOut.output(document, fos);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}catch (IOException e) {
			e.printStackTrace();
		}
		
    }
    /**
     * 将生成的XML根据指定的编码转为字符串
     * @author SavageGarden
     * @param document
     * @param charsetName
     * @return
     */
    public static String outXMLToString(Document document,String charsetName){
    	XMLOutputter xmlOut = new XMLOutputter("", true, charsetName);
    	return xmlOut.outputString(document);
    }

xml文件内容

<?xml version="1.0" encoding="GB2312"?>
<Students>
		<Student num="1" name="张三" age="22" sex="男"/>
		<Student num="2" name="李四" age="23" sex="男"/>
		<Student num="3" name="王五" age="24" sex="男"/>
</Students>

测试输出内容和添加内容

File xmlFile = new File("E:\\xmlForYaWu.xml");
		printEntity(getEntityListByXmlFile(xmlFile));
		
		Student student = new Student();
		student.setNum("4");
		student.setName("李六");
		student.setAge("34");
		student.setSex("女");
		outXMLToFile(addEntityToXML(student,doc),xmlFile,"GB2312");
		printEntity(getEntityListByXmlFile(xmlFile));

结果：

编号：1--姓名：张三--年龄：22--性别：男
编号：2--姓名：李四--年龄：23--性别：男
编号：3--姓名：王五--年龄：24--性别：男
编号：1--姓名：张三--年龄：22--性别：男
编号：2--姓名：李四--年龄：23--性别：男
编号：3--姓名：王五--年龄：24--性别：男
编号：4--姓名：李六--年龄：34--性别：女