将JsonArray按某一个字段分组成多个JsonArray的方法

String sourceStr = "[\n" +
                "    {\"id\":\"1001\",\"name\":\"测试1\",\"value\":\"111\"},\n" +
                "    {\"id\":\"1002\",\"name\":\"测试2\",\"value\":\"222\"},\n" +
                "    {\"id\":\"1002\",\"name\":\"测试2\",\"value\":\"22222\"},\n" +
                "    {\"id\":\"1002\",\"name\":\"测试2\",\"value\":\"2222222\"},\n" +
                "    {\"id\":\"1003\",\"name\":\"测试3\",\"value\":\"333\"},\n" +
                "    {\"id\":\"1003\",\"name\":\"测试3\",\"value\":\"333333\"}\n" +
                "]";
        JSONArray data1=JSONArray.parseArray(sourceStr);
        Map<String, List<?>> dataMap = new HashMap<String, List<?>>();

        //数据分组算法
        for (int i = 0; i < data1.size(); i++) {
            JSONObject json = (JSONObject)data1.get(i);
            List<Object> tempList = (List<Object>) dataMap.get(json.get("id"));
            if(tempList == null) { //第一次则创建list
                tempList = new ArrayList<>();
                tempList.add(json);
                dataMap.put(json.get("id").toString(), tempList);//放入map中
            }else {
                tempList.add(json);
            }
        }
        //遍历
        for (String id: dataMap.keySet()) {
            JSONArray objects = JSONArray.parseArray(JSON.toJSONString(dataMap.get(id)));
            System.out.println(objects.toString());
        }

标签：name,多个,get,JsonArray,json,value,字段,id,tempList
来源： https://www.cnblogs.com/void--main/p/16594846.html