java 序列化反序列化xml【使用XStream类库】
【摘要】 XStream是一个简单的类库，可以序列化对象到xml，还可以将xml还原为对象。 XStream官网： http://xstream.codehaus.org/ 附件提供XStream和xpp3相关的jar下载： xstream-1.2.2.jar xpp3-1.1.3.3_min.jar 为了使用XStream，需...
XStream是一个简单的类库，可以序列化对象到xml，还可以将xml还原为对象。
XStream官网： http://xstream.codehaus.org/
附件提供XStream和xpp3相关的jar下载：
xstream-1.2.2.jar
xpp3-1.1.3.3_min.jar
为了使用XStream，需要对其初始化，初始化方法有两种：
· XStream xstream = new XStream(); 这种方式的初始化需要xpp3-[version].jar的支持。xpp是一个快速解析XML文件的解析器。
· XStream xstream = new XStream(new DomDriver()); XStream xStream = new XStream(new DomDriver("utf-8")) 这种方式不需要 XPP3.jar的支持,它是使用标准的JAXP DOM来解析它
应：ejbtimer的要求增加了数组对象的序列化测试，不过我测试时没有设置mode参数也可以正常序列化。
同时这里对mode参数做个简单的说明：
在XStream序列化或反序列化对象时，它会创建两个类MarshallingContext和UnmarshallingContext，由它们来处理数据，以及委派合适的转换器。XStream提供了三对上下文的缺省实现，它们之间有着细微的差别。缺省值可以通过方法XStream.setMode()来改变，需要传递下面参数中的一个：
· XStream.XPATH_RELATIVE_REFERENCES：(缺省)通过XPath引用来标识重复的引用,使用相对路径表示。
· XStream.XPATH_ABSOLUTE_REFERENCES：通过XPath引用来标识重复的引用,使用绝对路径表示。
· XStream.ID_REFERENCES：使用ID引用来标识重复的引用。在一些场合（手写XML时），将会更易于操作
· XStream.NO_REFERENCES：这种情况将失去对图形对象的支持，仅把对象看作为树型结构。重复的引用被视作两个不同的对象，循环引用会导致异常产生。相对于上面两种模式，这种模式速度会更快，占用内存会更
下面简单的例子包括三个类：UserBean.java,ContactBean.java,XstreamTestMain.java代码如下：
xstream测试类: XstreamTestMain.java
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package michael.xstream;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import com.thoughtworks.xstream.XStream;
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import com.thoughtworks.xstream.io.xml.DomDriver;
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/**
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* Xtream 序列化及反序列化
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* @blog http://sjsky.iteye.com
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* @author Michael
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*/
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public class XtreamTestMain {
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/**
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* @param args
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*/
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public static void main(String[] args) {
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UserBean userBean = initBean();
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// 依懒xpp解析器
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// XStream xStream = new XStream();
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// 运用标准的DOM解析器
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// XStream xStream = new XStream(new DomDriver());
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// 指定编码格式
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XStream xStream = new XStream(new DomDriver("utf-8"));
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// xStream.setMode(XStream.NO_REFERENCES);
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// 直接指定修改生成XML的节点名称
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xStream.alias("UserBean", UserBean.class);
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String xml = xStream.toXML(userBean);
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System.out.println("BEAN转化为XML 字符串-----------------------------");
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System.out.println(xml);
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System.out.println("XML转化为BEAN-----------------------------");
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UserBean parseBean = (UserBean) xStream.fromXML(xml);
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System.out.println("userName:" + parseBean.getUserName());
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System.out.println("age:" + parseBean.getAge());
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System.out.println("birthday:" + parseBean.getBirthday());
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for (String str : parseBean.getAddresList()) {
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System.out.println("addres:" + str);
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}
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for (Entry<String, String> entry : parseBean.getNickNameMap()
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.entrySet()) {
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System.out.println("nick name:" + entry.getKey() + "<->"
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+ entry.getValue());
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}
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ContactBean contact = parseBean.getContact();
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System.out.println("postcode:" + contact.getPostCode());
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System.out.println("telephone:" + contact.getTelephone());
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System.out.println("mobile:" + contact.getMobile());
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System.out.println("email:" + contact.getEmail());
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System.out.println("BEAN转化为XML文件-----------------------------");
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try {
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FileOutputStream fos = new FileOutputStream("d:/test/userbean.xml");
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xStream.toXML(userBean, fos);
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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System.out.println("XML文件转化为BEAN-----------------------------");
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UserBean parseFileBean = new UserBean();
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try {
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FileInputStream fis = new FileInputStream("d:/test/userbean.xml");
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parseFileBean = (UserBean) xStream.fromXML(fis, parseFileBean);
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System.out.println("parseFileBean->" + parseFileBean);
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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}
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/**
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* @return test bean
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*/
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private static UserBean initBean() {
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ContactBean contact = new ContactBean();
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contact.setPostCode("200000");
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contact.setTelephone("021-88888888");
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contact.setMobile("1891800xxxx");
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contact.setEmail("test@test.com");
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List<String> addressList = new ArrayList<String>();
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addressList.add("上海杨浦");
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addressList.add("江苏苏州");
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Map<String, String> nickNameMap = new HashMap<String, String>();
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nickNameMap.put("大大", "小小");
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nickNameMap.put("老公", "老婆");
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UserBean userBean = new UserBean();
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userBean.setUserName("michael");
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userBean.setAge(26);
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userBean.setBirthday(new Date());
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userBean.setAddresList(addressList);
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userBean.setNickNameMap(nickNameMap);
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userBean.setContact(contact);
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ContactBean contact1 = new ContactBean();
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contact1.setPostCode("200011");
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contact1.setTelephone("021-11111111");
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contact1.setMobile("13911111111");
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contact1.setEmail("contact1@test.com");
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ContactBean contact2 = new ContactBean();
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contact2.setPostCode("20002");
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contact2.setTelephone("021-22222222");
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contact2.setMobile("13922222222");
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contact2.setEmail("contact2@test.com");
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ContactBean[] contactArr = new ContactBean[] { contact1, contact2 };
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userBean.setContactArr(contactArr);
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return userBean;
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}
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}
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测试UserBean:UserBean.java
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package michael.xstream;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* @author Michael
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*/
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public class UserBean {
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/**
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* 用户名称
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*/
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private String userName;
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/**
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* 年龄
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*/
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private Integer age;
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/**
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* 出生日期
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*/
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private Date birthday;
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/**
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* 地址
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*/
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private List<String> addresList = new ArrayList<String>();
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/**
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* 昵称
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*/
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private Map<String, String> nickNameMap = new HashMap<String, String>();
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/**
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* 联系方式Bean
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*/
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private ContactBean contact;
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/**
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* 测试对象数组
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*/
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private ContactBean[] contactArr;
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/**
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* @return the userName
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*/
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public String getUserName() {
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return userName;
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}
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/**
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* @return the age
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*/
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public Integer getAge() {
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return age;
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}
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/**
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* @return the birthday
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*/
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public Date getBirthday() {
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return birthday;
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}
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/**
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* @return the addresList
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*/
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public List<String> getAddresList() {
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return addresList;
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}
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/**
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* @return the nickNameMap
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*/
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public Map<String, String> getNickNameMap() {
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return nickNameMap;
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}
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/**
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* @return the contact
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*/
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public ContactBean getContact() {
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return contact;
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}
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/**
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* @param pUserName the userName to set
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*/
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public void setUserName(String pUserName) {
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userName = pUserName;
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}
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/**
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* @param pAge the age to set
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*/
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public void setAge(Integer pAge) {
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age = pAge;
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}
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/**
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* @param pBirthday the birthday to set
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*/
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public void setBirthday(Date pBirthday) {
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birthday = pBirthday;
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}
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/**
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* @param pAddresList the addresList to set
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*/
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public void setAddresList(List<String> pAddresList) {
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addresList = pAddresList;
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}
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/**
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* @param pNickNameMap the nickNameMap to set
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*/
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public void setNickNameMap(Map<String, String> pNickNameMap) {
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nickNameMap = pNickNameMap;
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}
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/**
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* @param pContact the contact to set
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*/
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public void setContact(ContactBean pContact) {
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contact = pContact;
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}
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/**
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* @return the contactArr
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*/
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public ContactBean[] getContactArr() {
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return contactArr;
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}
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/**
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* @param pContactArr the contactArr to set
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*/
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public void setContactArr(ContactBean[] pContactArr) {
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contactArr = pContactArr;
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}
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}
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测试ContactBean :ContactBean.java
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package com.test;
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/**
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* @author Michael
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*/
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public class ContactBean {
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/**
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* 邮编
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*/
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private String postCode;
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/**
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* 电话
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*/
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private String telephone;
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/**
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* 手机
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*/
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private String mobile;
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/**
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* email
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*/
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private String email;
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/**
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* @return the postCode
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*/
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public String getPostCode() {
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return postCode;
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}
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/**
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* @return the telephone
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*/
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public String getTelephone() {
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return telephone;
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}
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/**
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* @return the mobile
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*/
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public String getMobile() {
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return mobile;
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}
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/**
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* @return the email
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*/
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public String getEmail() {
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return email;
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}
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/**
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* @param pPostCode the postCode to set
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*/
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public void setPostCode(String pPostCode) {
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postCode = pPostCode;
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}
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/**
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* @param pTelephone the telephone to set
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*/
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public void setTelephone(String pTelephone) {
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telephone = pTelephone;
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}
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/**
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* @param pMobile the mobile to set
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*/
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public void setMobile(String pMobile) {
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mobile = pMobile;
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}
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/**
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* @param pEmail the email to set
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*/
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public void setEmail(String pEmail) {
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email = pEmail;
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}
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}
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运行测试代码，打印结果如下：
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引用
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BEAN转化为XML 字符串-----------------------------
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<UserBean>
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<userName>michael</userName>
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<age>26</age>
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<birthday>2011-07-20 23:33:32.969 CST</birthday>
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<addresList>
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<string>上海杨浦</string>
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<string>江苏苏州</string>
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</addresList>
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<nickNameMap>
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<entry>
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<string>老公</string>
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<string>老婆</string>
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</entry>
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<entry>
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<string>大大</string>
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<string>小小</string>
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</entry>
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</nickNameMap>
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<contact>
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<postCode>200000</postCode>
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<telephone>021-88888888</telephone>
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<mobile>1891800xxxx</mobile>
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<email>test@test.com</email>
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</contact>
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<contactArr>
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<michael.xstream.ContactBean>
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<postCode>200011</postCode>
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<telephone>021-11111111</telephone>
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<mobile>13911111111</mobile>
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<email>contact1@test.com</email>
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</michael.xstream.ContactBean>
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<michael.xstream.ContactBean>
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<postCode>20002</postCode>
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<telephone>021-22222222</telephone>
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<mobile>13922222222</mobile>
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<email>contact2@test.com</email>
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</michael.xstream.ContactBean>
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</contactArr>
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</UserBean>
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XML转化为BEAN-----------------------------
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userName:michael
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age:26
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birthday:Wed Jul 20 23:33:32 CST 2011
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addres:上海杨浦
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addres:江苏苏州
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nick name:老公<->老婆
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nick name:大大<->小小
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postcode:200000
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telephone:021-88888888
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mobile:1891800xxxx
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email:test@test.com
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BEAN转化为XML文件-----------------------------
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XML文件转化为BEAN-----------------------------
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parseFileBean->michael.xstream.UserBean@bf7190
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生成的XML文件userbean.xml：
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<UserBean>
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<userName>michael</userName>
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<age>26</age>
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<birthday>2011-07-20 23:33:32.969 CST</birthday>
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<addresList>
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<string>上海杨浦</string>
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<string>江苏苏州</string>
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</addresList>
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<nickNameMap>
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<entry>
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<string>老公</string>
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<string>老婆</string>
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</entry>
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<entry>
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<string>大大</string>
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<string>小小</string>
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</entry>
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</nickNameMap>
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<contact>
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<postCode>200000</postCode>
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<telephone>021-88888888</telephone>
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<mobile>1891800xxxx</mobile>
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<email>test@test.com</email>
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</contact>
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<contactArr>
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<michael.xstream.ContactBean>
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<postCode>200011</postCode>
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<telephone>021-11111111</telephone>
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<mobile>13911111111</mobile>
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<email>contact1@test.com</email>
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</michael.xstream.ContactBean>
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<michael.xstream.ContactBean>
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<postCode>20002</postCode>
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<telephone>021-22222222</telephone>
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<mobile>13922222222</mobile>
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<email>contact2@test.com</email>
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</michael.xstream.ContactBean>
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</contactArr>
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</UserBean>
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-
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到此测试例子结束，是不是觉得很方便啊，吼吼
文章来源: bugstack.blog.csdn.net，作者：Yao__Shun__Yu，版权归原作者所有，如需转载，请联系作者。
原文链接：bugstack.blog.csdn.net/article/details/17397891
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