1、不带包的使用方式

解压json和支持包在当前目录下生成

org

net

javac User.java

javac Test.java

java Test  输出

{"age":25,"name":"phl"}

[{"age":25,"name":"phl"},{"age":26,"name":"luckybird"}]

{"age":0,"name":""}

------------------User.java-----------------

public class User
{
private String name;
private int age;

public String getName()
{
return this.name;
}

public  int getAge(){
return this.age;

}

public void setName(String v_name)
{
this.name=v_name;
}

public void setAge(int v_age)
{
this.age=v_age;
}
}

---------------Test.java------------------

    import java.util.ArrayList; 
    import java.util.List; 
     
    import net.sf.json.JSON; 
    import net.sf.json.JSONObject; 
    import net.sf.json.JSONSerializer; 
     
    public class Test { 
     
        public static void main(String[] args) throws Exception { 
            User user = new User(); 
            user.setName("phl"); 
            user.setAge(25); 
            User user2 = new User(); 
            user2.setName("luckybird"); 
            user2.setAge(26); 
     
            List<User> list = new ArrayList<User>(); 
            list.add(user); 
            list.add(user2); 
     
            JSONObject json = JSONObject.fromObject(user); 
            System.out.println(json.toString()); 
     
            // ******************************************************** 
            JSON json2 = JSONSerializer.toJSON(list); 
            System.out.println(json2.toString()); 
     
            json2 = JSONSerializer.toJSON(new User()); 
            System.out.println(json2.toString()); 
     
        } 
    } 

=====================================================================
2、带包的使用方式

------------------User.java-----------------
package nn;

public class User
{
private String name;
private int age;

public String getName()
{
return this.name;
}

public  int getAge(){
return this.age;

}

public void setName(String v_name)
{
this.name=v_name;
}

public void setAge(int v_age)
{
this.age=v_age;
}
}

---------------Test.java------------------
 package mm;

    import java.util.ArrayList; 
    import java.util.List; 
     
    import net.sf.json.JSON; 
    import net.sf.json.JSONObject; 
    import net.sf.json.JSONSerializer;  
    import nn.User;
      
    public class Test { 
     
        public static void main(String[] args) throws Exception { 
            User user = new User(); 
            user.setName("phl"); 
            user.setAge(25); 
            User user2 = new User(); 
            user2.setName("luckybird"); 
            user2.setAge(26); 
     
            List<User> list = new ArrayList<User>(); 
            list.add(user); 
            list.add(user2); 
     
            JSONObject json = JSONObject.fromObject(user); 
            System.out.println(json.toString()); 
     
            // ******************************************************** 
            JSON json2 = JSONSerializer.toJSON(list); 
            System.out.println(json2.toString()); 
     
            json2 = JSONSerializer.toJSON(new User()); 
            System.out.println(json2.toString()); 
     
        } 
    } 

==================
javac User.java ->User.class
javac Test.java ->Test.class
拷贝User.class->nn目录下 ;Test.class->mm目录下
调用方式java mm.Test

{"age":25,"name":"phl"}
[{"age":25,"name":"phl"},{"age":26,"name":"luckybird"}]
{"age":0,"name":""}