XStream 轻松搞定JAVA对象与XML/JSON之间相互转换

   上一遍已对xstream进行了初步认识，此处就不再多作介绍，直入主题,以下主要主要为,JavaBean --> XML / JSON 、XML / JSON --> JavaBean之间相互转换：

   一| 先写实体类：   

   Address.java
  
  

   public class Address {
	private String oldAddress;
	private String newAddress;
	
	public String getOldAddress() {
		return oldAddress;
	}
	public void setOldAddress(String oldAddress) {
		this.oldAddress = oldAddress;
	}
	public String getNewAddress() {
		return newAddress;
	}
	public void setNewAddress(String newAddress) {
		this.newAddress = newAddress;
	}
}
   

Person.java

  

      public class Person {
	private String name;
	private String sex;
	private int age;
	private Address address;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
}
   

Test.java 
 

import java.io.PrintWriter;

import vo.Address;
import vo.Person;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver;
import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver;
import com.thoughtworks.xstream.io.xml.DomDriver;

/**
 *@class Description:
 *@author like
 *@version create on May 19, 2011 
 */
public class Test {
	public static void main(String[] args) {
                  //JavaBean --> XML
		Address address=new Address();
		Person person=new Person();
		address.setOldAddress("湖南长沙");
		address.setNewAddress("广州白云");
		person.setName("理科");
		person.setSex("男");
		person.setAge(22);
		person.setAddress(address);
		XStream xstream = new XStream(new DomDriver());
		xstream.alias("person", Person.class);
		xstream.alias("address", Address.class);
		xstream.toXML(person,new PrintWriter(System.out));
		
                  //XML --> JavaBean
		String strxml="<person><name>理科</name><sex>男</sex><age>19</age><address><oldAddress>湖南长沙</oldAddress><newAddress>广州白云</newAddress></address></person>";
		XStream xstream2 = new XStream(new DomDriver());
		xstream2.alias("person", Person.class);
		xstream2.alias("address", Address.class);
		Person person2=(Person) xstream2.fromXML(strxml);
		System.out.println(person2.getName());
		System.out.println(person2.getSex());
		System.out.println(person2.getAddress().getOldAddress());
		System.out.println(person2.getAddress().getNewAddress());
		
                   //JavaBean --> JSON
		Address address3=new Address();
		Person person3=new Person();
		address3.setOldAddress("湖南长沙");
		address3.setNewAddress("广州白云");
		person3.setName("理科");
		person3.setSex("男");
		person3.setAge(22);
		person3.setAddress(address3);
                  //new JsonHierarchicalStreamDriver()
		XStream xstream3 = new XStream(new JsonHierarchicalStreamDriver());
		xstream3.alias("person", Person.class);
		xstream3.alias("address", Address.class);
		//new PrintWriter(System.out) 输出去控制台
		xstream3.toXML(person3,new PrintWriter(System.out)); 

		//JSON--> JavaBean
		String jsonstr="{\"person\": {\"name\": \"理科\",\"sex\": \"男\",\"age\": \"19\",\"address\": {\"oldAddress\": \"湖南长沙\",\"newAddress\": \"广州白云\"}}}";
                 //new JettisonMappedXmlDriver()
		XStream xstream4 = new XStream(new JettisonMappedXmlDriver());
		xstream4.alias("person", Person.class);
		xstream4.alias("address", Address.class);
		Person person4=(Person) xstream4.fromXML(jsonstr);
		System.out.println(person4.getName());
		System.out.println(person4.getSex());
		System.out.println(person4.getAddress().getOldAddress());
		System.out.println(person4.getAddress().getNewAddress());
	}
}

注：

1）、使用xStream.alias(String elementName, Class cls)为任何一个自定义类创建到类到元素的别名,如果不使用别名，则生成的标签名为类全名；
2）、使用xStream.toXML(Object obj)转换对象到XML；
3）、使用xStream.fromXML(String xml)转换XML到对象；