java之JSONArray与List相互转换

注意：本文举例使用JSON的是fastjson 

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1：JSONArray转List

1. JSONArray字符串 转 List

   //初始化JSONArray
   JSONArray array=new JSONArray();
   array.add(0,"a");
   array.add(1,"b");
   array.add(2,"c");
   
   List list = JSONObject.parseArray(array.toJSONString(),String.class);
   
   System.out.println(list.toString());

   输出结果：
   [a, b, c]

2. JSONArray对象 转 List

   //初始化JSONArray
   JSONArray jsonArray = JSONArray.parseArray("[{\"name\":\"zhangsan\",\"age\":18},{\"name\":\"lisi\",\"age\":23}]");
   //打印jsonArray
   System.out.println(jsonArray.toJSONString());
   //转List
   List list = JSONArray.parseArray(jsonArray.toJSONString(), Body.class);
   //打印List
   System.out.println(list.toString());
   
   
   
   
   /**
   *测试实体类
   **/
   static class Body implements Serializable {
           private static final long serialVersionUID = 1L;
           private String name;
           private int age;
   
           public String getName() {
               return name;
           }
   
           public void setName(String name) {
               this.name = name;
           }
   
           public int getAge() {
               return age;
           }
   
           public void setAge(int age) {
               this.age = age;
           }
   
           @Override
           public String toString() {
               return "Body{" +
                       "name='" + name + '\'' +
                       ", age=" + age +
                       '}';
           }
   }

   输出结果：
   [{"name":"zhangsan","age":18},{"name":"lisi","age":23}]
   [Body{name='zhangsan', age=18}, Body{name='lisi', age=23}]

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2：List转JSONArray
    

List list = new ArrayList();
JSONArray jsonArray = JSONArray.parseArray(JSON.toJSONString(list));