String生成的json資料有兩種

1

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

2

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

String型別的資料加“”，然後每個key，value加單引號。

JsonObject生成的資料有兩種

1

        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){

        }
        結果：{"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){


        }
       結果：[{"color":"red","height":20},{"color":"blue","height":1010}]

將集合生成json資料

1

        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());
        結果：{"key":[{"name1":"tom1","age1":"12"},{"name1":"tom1","age1":"12"}]}

2

        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());
        結果：[{"asfa":"afasff","as":"adasd"}]

基本都是類似。。