jsonArray排序复制直接用

电玩女神 2023-10-09 14:00 80阅读 0赞

方法一

例子：根据实际情况String jsonArrStr = "[{\"ID\":\"A01\",\"Name\":\"张三\",\"Score\":88},{\"ID\":\"A02\",\"Name\":\"李四\",\"Score\":99},{\"ID\":\"A01\",\"Name\":\"王五\",\"Score\":77}]";
    
    public JSONArray jsonArraySort(JSONArray jsonArrStr) {
            // json字符串转为JSONArray
            // JSONArray jsonArr = JSON.parseArray(jsonArrStr);
            //存放排序结果json数组
            JSONArray sortedJsonArray = new JSONArray();
            // 用于排序的list
            List<JSONObject> list = new ArrayList<JSONObject>();
            //遍历待排序的json数组，并将数据放入list
            for (int i = 0; i < jsonArrStr.size(); i++) {
                list.add(jsonArrStr.getJSONObject(i));
            }
    
            Collections.sort(list, new Comparator<JSONObject>() {
                //排序字段
                private static final String KEY_NAME1 = "END_TIME";
                private static final String KEY_NAME2 = "Score";
    
                @Override
                public int compare(JSONObject a, JSONObject b) {
                    String valA1 = new String();
                    String valA2 = new String();
                    String valB1 = new String();
                    String valB2 = new String();
                    try {
                        valA1 = a.getString(KEY_NAME1);
                        valA2 = b.getString(KEY_NAME1);
                        valB1 = a.getString(KEY_NAME2);
                        valB2 = b.getString(KEY_NAME2);
                    } catch (JSONException e) {
                    }
                    // 设置排序规则
                    int i = valA1.compareTo(valA2);
                    if (i == 0) {
                        int j = valB1.compareTo(valB2);
                        return j;
                    }
                    return i;
                }
            });
            //将排序后结果放入结果jsonArray
            for (int i = 0; i < jsonArrStr.size(); i++) {
                sortedJsonArray.add(list.get(i));
            }
            return sortedJsonArray;
        }

方法二

例子根据实际情况：String str = "[{\"score\":77,\"id\":\"A04\"},{\"score\":88,\"id\":\"A01\"},{\"score\":66,\"id\":\"A01\"}]";
            System.out.println("排序前: " + str);
            JSONArray array = JSON.parseArray(str);
    
            for (Object arr : array) {
                System.out.println(arr);
            }
    
            // 方式一
    //        array.sort(Comparator.comparing(obj -> ((JSONObject)obj).getInteger("score")));
    //        array.sort(Comparator.comparing(e-> ((JSONObject)e).getString("id")));
            // 方式二：单字段排序
    //        array.sort((a, b) -> ((JSONObject) a).getString("id").compareTo(((JSONObject) b).getString("id")));
            // 方式二：多字段排序
            array.sort((a, b) -> {
                int i = ((JSONObject) a).getString("id").compareTo(((JSONObject) b).getString("id"));
                if (i == 0) {
                    int j = ((JSONObject) a).getInteger("score").compareTo(((JSONObject) b).getInteger("score"));
                    return j;
                }
                return i;
            });
            System.out.println("排序后: " + array);
    
            for (Object arr : array) {
                System.out.println(arr);
            }