List与JSON字符串，实体类与JSON字符串、Map与JSON字符串之间的转换

1. List 转换成JSON字符串

   List<Student> list = new ArrayList<Student>();

   Student stu = new Student();

   stu.setId(1);

   stu.setName("张三");

   stu.setAge(25);

   ste.setAddress("河南郑州");

   list.add(stu);

   stu = new Student();

   stu.setId(2);

   stu.setName("李四");

   stu.setAge(30);

   ste.setAddress("河南周口");

    list.add(stu);

   String jsonString = JSON.toJSONString(list);//list转json字符串

   System.out.println(jsonString);
2.  JSON字符串转换成List
3.  String jsonString = "[{id:1,name:'张三',age:25,address:'河南郑州'},{id:2,name:'李四',age:30,address:'河南周口'}]";
4. List<Student> list = JSON.parseArray(jsonString, Student.class);//list json字符串转list
5.  System.out.println(list.get(0));
6. System.out.println(list.get(1));
7. 实体类转换成JSON字符串

　　　　Student stu2 = new Student();

　　　　stu2.setId(1);

　　　　stu2.setName("张三");

1.  
   String jsonString = JSON.toJSONString(entity);//list转json字符串

   System.out.println(jsonString);

   字符串转换成实体类
2.  String entityStr = "{id:1,name:'张三'}";
   Student entity = JSON.parseObject(entityStr , Student.class);//实体类包含list,转实体类
3.  System.out.println(entity.getName());
5.  
   Map<String,Object> map = new HashMap<>();
6.  
   map.put("betType",bedType);
7.  
   map.put("list",list);
8.  
   String redisStr=JSON.toJSONString(map)

   System.out.println(redisStr);
9.  
   Map<String,Object> map1 = JSON.parseObject(redisStr));

   System.out.println(map1);