xStream学习xml，JASON,JAVA对象转换

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       xStream不仅对XML的转换非常友好，而且提供annotation注解，可以在JavaBean中完成对xml节点、属性的描述。以及对JSON也支持，只需要提供相关的JSONDriver就可以完成转换。

 

       准备工作jar文件的下载：https://nexus.codehaus.org/content/repositories/releases/com/thoughtworks/xstream/xstream-distribution/1.3.1/xstream-distribution-1.3.1-bin.zip

 

   1  用Junit作为测试工具

//junit 测试类 
public class XStreamTest {
    
    private XStream xstream = null;
    private ObjectOutputStream  out = null;
    private ObjectInputStream in = null;
    private Student bean = null;
    
    /**
     * function:初始化资源准备
     * @author hoojo
     * @createDate Nov 27, 2010 12:16:28 PM
     */
    @Before
    public void init() {
        try {
            xstream = new XStream();
            //xstream = new XStream(new DomDriver()); // 需要xpp3 jar
        } catch (Exception e) {
            e.printStackTrace();
        }
        bean = new Student();
        bean.setAddress("china");
        bean.setEmail("[email protected]");
        bean.setId(1);
        bean.setName("jack");
        Birthday day = new Birthday();
        day.setBirthday("2010-11-22");
        bean.setBirthday(day);
    }
    
    /**
     * function:释放对象资源
     */
    @After
    public void destory() {
        xstream = null;
        bean = null;
        try {
            if (out != null) {
                out.flush();
                out.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.gc();
    }
 
    
    public final void fail(String string) {
        System.out.println(string);
    }
    
    public final void failRed(String string) {
        System.err.println(string);
    }
}
  

 

    需要的基础实体类 

public class Birthday {
	private String birthday;
}

 

package xstream;

public class Student {
    private int id;
    private String name;
    private String email;
    private String address;
    private Birthday birthday;
    //getter、setter
    public String toString() {
        return this.name + "#" + this.id + "#" + this.address + "#" + this.birthday + "#" + this.email;
    }

}

 

   二 测试java类转为xml方法

 

   1 实体bean转换成XML

    @Test
    public void writeBean2XML() {
        try {
            fail("------------Bean->XML------------");
            fail(xstream.toXML(bean));
            fail("重命名后的XML");
            //类重命名
            //xstream.alias("account", Student.class);
            //xstream.alias("生日", Birthday.class);
            //xstream.aliasField("生日", Student.class, "birthday");
            //xstream.aliasField("生日", Birthday.class, "birthday");
            //fail(xstream.toXML(bean));
            //属性重命名
//            xstream.aliasField("邮件", Student.class, "email");
            //包重命名
//            xstream.aliasPackage("xstream", "com.hoo.entity");
            fail(xstream.toXML(bean));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

 

   测试答应的xml文档 其中 第二个xml中的报名是被重命名的

------------Bean->XML------------

  1
  jack
  [email protected]
  
china
  
    2010-11-22
  

重命名后的XML

  1
  jack
  [email protected]
  
china
  
    2010-11-22
  

 2、 将List集合转换成xml文档

 

 

 

  @Test
    public void writeList2XML() {

        try {

            //修改元素名称

            xstream.alias("beans", ListBean.class);
            xstream.alias("student", Student.class);
            fail("----------List-->XML----------");
            
            ListBean listBean = new ListBean();
            listBean.setName("this is a List Collection");
            
            List