Android中生成json格式数据的几种方法

秒速五厘米 2022-05-14 11:47 419阅读 0赞

## String生成的json数据有两种 ##

String json="[{'name':'tom','age':12},{'name':'jack','age':13}]";
    JSONArray a = new JSONArray(json);
    System.out.println(a.toString());

String json2="{'json':[{'name':'tom','age':14},{'name':'jack','age':15}]}";
    JSONObject b= new JSONObject(json2);
    System.out.println(b.toString());

*  String类型的数据加“”，然后每个key，value加单引号。

## JsonObject生成的数据有两种 ##

JSONArray array =new JSONArray();
            JSONObject object =new JSONObject();
            JSONObject object1 =new JSONObject();
            JSONObject obj= new JSONObject();
            try {
                object.put("item1","value1");
                object.put("age",12);
                object.put("name","tom");
                object1.put("item2","value2");
                object1.put("age",12232);
                object1.put("name","tom");
                array.put(object);
                array.put(object1);
                obj.put("name",array);
                System.out.println(obj.toString());
            }catch (Exception e){
    
            }
            结果：{"name":[{"item1":"value1","name":"tom","age":12},{"item2":"value2","name":"tom","age":12232}]}

*  2

JSONArray array1 =new JSONArray();
            JSONObject object2 =new JSONObject();
            JSONObject object3 =new JSONObject();
            try {
                object2.put("color","red");
                object2.put("height",20);
                object3.put("color","blue");
                object3.put("height",1010);
                array1.put(object2);
                array1.put(object3);
                System.out.println(array1.toString());
            }catch (Exception e){
    
    
            }
           结果：[{"color":"red","height":20},{"color":"blue","height":1010}]

*  将集合生成json数据

Map<String ,String> map =new HashMap<>();
            Map<String ,String> map2 =new HashMap<>();
            map.put("name1","tom1");
            map.put("age1","12");
            map2.put("name1","tom1");
            map2.put("age1","12");
            JSONObject object4 =new JSONObject();
            JSONArray array2 =new JSONArray();
            array2.put(map);
            array2.put(map2);
            object4.put("key",array2);
            System.out.println(object4.toString());
            结果：{"key":[{"name1":"tom1","age1":"12"},{"name1":"tom1","age1":"12"}]}

Map<String ,String> map1 =new HashMap<>();
            map1.put("as","adasd");
            map1.put("asfa","afasff");
            JSONArray array3 =new JSONArray();
            array3.put(map1);
            System.out.println(array3.toString());
            结果：[{"asfa":"afasff","as":"adasd"}]