XStream入门示例DEMO

//POJO类:public class XStreamTestPojo {public byte id;public short startLevel;public short endLevel;public byte item;// GETTER & SETTERpublic String toString() {return this.getId() + "==" + this.getStartLevel() + "=="+ this.getEndLevel() + "==" + this.getItem();}}//Test类:public class XStreamTestUtil {public static void main(String[] args) {XStreamTestPojo pojo = new XStreamTestPojo();pojo.setId((byte) 1);pojo.setStartLevel((short) 1);pojo.setEndLevel((short) 9);pojo.setItem((byte) 3);//XStreamTestPojo pojo1 = new XStreamTestPojo();pojo1.setId((byte) 2);pojo1.setStartLevel((short) 10);pojo1.setEndLevel((short) 19);pojo1.setItem((byte) 2);//List<XStreamTestPojo> pojos = new ArrayList<XStreamTestPojo>();pojos.add(pojo);pojos.add(pojo1);// new XStreamTestUtil().writerXML(pojos);// new XStreamTestUtil().readXML();new XStreamTestUtil().addElement(pojo1);}public void writerXML(List<XStreamTestPojo> pojo) {XStream xStream = new XStream(new DomDriver()); // 不需要XPP3库xStream.alias("TestPOJO", XStreamTestPojo.class);// xStream.aliasAttribute(XStreamTestPojo.class,"id","编号"); //放为属性xStream.aliasField("编号", XStreamTestPojo.class, "id"); // 设置别名try {FileWriter writer = new FileWriter("pojo.xml");xStream.toXML(pojo, writer);} catch (IOException e) {e.printStackTrace();}}@SuppressWarnings("unchecked")public List<XStreamTestPojo> readXML() {XStream xStream = new XStream(new DomDriver()); // 不需要XPP3库xStream.alias("TestPOJO", XStreamTestPojo.class); // 设置类别,或者无法读取报com.thoughtworks.xstreamxStream.aliasField("编号", XStreamTestPojo.class, "id"); // 对类对应,XML文件中的编号对应为iDReader reader = null;try {reader = new FileReader("pojo.xml");} catch (FileNotFoundException e) {e.printStackTrace();}List<XStreamTestPojo> pojos = (List<XStreamTestPojo>) xStream.fromXML(reader);for (XStreamTestPojo pojo : pojos) {System.out.println(pojo);}return pojos;}/** * API中我没有找到可以直接在尾部添加Element的方法 *  * @param pojo *            欲添加的Element *            Comment:因为API中无直接添加的方法,所以:先读出元素List,再在List的尾部添加元素,再重新写入XML文件 *            缺点:当文件太大,太多的重复操作,导致资源消耗. */public void addElement(XStreamTestPojo pojo) {List<XStreamTestPojo> pojos = this.readXML();pojos.add(pojo);this.writerXML(pojos);}}