json数组和List转换-蒲公英云

json数组和List转换

梦里梦外; 2022-03-12 06:54 348阅读 0赞

json数组和List转换

使用的是json-lib.jar包

将json格式的字符数组转为List对象

package hb;  
import java.util.Date;  
public class Person {  
    String id;  
    int age;  
    String name;  
    Date birthday;  
    public String getId() {  
        return id;  
    }  
    public void setId(String id) {  
        this.id = id;  
    }  
    public int getAge() {  
        return age;  
    }  
    public void setAge(int age) {  
        this.age = age;  
    }  
    public String getName() {  
        return name;  
    }  
    public void setName(String name) {  
        this.name = name;  
    }  
    public Date getBirthday() {  
        return birthday;  
    }  
    public void setBirthday(Date birthday) {  
        this.birthday = birthday;  
    }  
}  
package hb;  
import java.util.Iterator;  
import java.util.List;  
import org.junit.Test;  
import net.sf.json.JSONArray;  
import net.sf.json.JsonConfig;  
public class JsonToList {  
    public static void main(String[] args) {  
        String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";  
        JSONArray jsonarray = JSONArray.fromObject(json);  
        System.out.println(jsonarray);  
        List list = (List)JSONArray.toCollection(jsonarray, Person.class);  
        Iterator it = list.iterator();  
        while(it.hasNext()){  
            Person p = (Person)it.next();  
            System.out.println(p.getAge());  
        }  
    }  
    @Test  
    public void jsonToList1(){  
        String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";  
        JSONArray jsonarray = JSONArray.fromObject(json);  
        System.out.println(jsonarray);  
        List list = (List)JSONArray.toList(jsonarray, Person.class);  
        Iterator it = list.iterator();  
        while(it.hasNext()){  
            Person p = (Person)it.next();  
            System.out.println(p.getAge());  
        }  
    }  
    @Test  
    public void jsonToList2(){  
        String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";  
        JSONArray jsonarray = JSONArray.fromObject(json);  
        System.out.println(jsonarray);  
        System.out.println("------------");  
        List list = (List)JSONArray.toList(jsonarray, new Person(), new JsonConfig());  
        Iterator it = list.iterator();  
        while(it.hasNext()){  
            Person p = (Person)it.next();  
            System.out.println(p.getAge());  
        }  
    }  
}

将list对象转为JSON字符串数组

package hb;  
import java.util.LinkedList;  
import java.util.List;  
import net.sf.json.JSONArray;  
public class ListToJson {  
    public static void main(String[] args) {  
        List list = new LinkedList();  
        for(int i=0;i<3;i++){  
            Person p = new Person();  
            p.setAge(i);  
            p.setName("name"+i);  
            list.add(p);  
        }  
        JSONArray jsonarray = JSONArray.fromObject(list);  
        System.out.println(jsonarray);  
    }  
}