JSONArray进行排序

前言

根据业务需要,需要把前端传的JSONArray,按照week升序排序

环境

• JDK 1.8.0 +
• Maven 3.0 +
• Redis 2.4.2
• SpringBoot 2.0.3

开发工具

• IntelliJ IDEA

正文

前端传入json数据

String str = "[{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":4},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":1},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":0},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":3},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":2},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":5},{\"endTime\":\"24:00\",\"startTime\":\"00:00\",\"week\":6}]";

        System.out.println("-------排序前---------");
        JSONArray array = JSONArray.fromObject(str);
        array.forEach(e->{
            System.out.println(e);
        });
        
        array.sort(Comparator.comparing(obj -> ((JSONObject) obj).getInt("week")));
        
        System.out.println("-------排序后---------");
        array.forEach(e->{
            System.out.println(e);
        });

输出

-------排序前---------
{"endTime":"24:00","startTime":"00:00","week":4}
{"endTime":"24:00","startTime":"00:00","week":1}
{"endTime":"24:00","startTime":"00:00","week":0}
{"endTime":"24:00","startTime":"00:00","week":3}
{"endTime":"24:00","startTime":"00:00","week":2}
{"endTime":"24:00","startTime":"00:00","week":5}
{"endTime":"24:00","startTime":"00:00","week":6}
-------排序后---------
{"endTime":"24:00","startTime":"00:00","week":0}
{"endTime":"24:00","startTime":"00:00","week":1}
{"endTime":"24:00","startTime":"00:00","week":2}
{"endTime":"24:00","startTime":"00:00","week":3}
{"endTime":"24:00","startTime":"00:00","week":4}
{"endTime":"24:00","startTime":"00:00","week":5}
{"endTime":"24:00","startTime":"00:00","week":6}

降序排序

staffArray.sort(Comparator.comparing(obj -> ((JSONObject) obj).getBigDecimal("orderAmt")).reversed());

我的是根据数字大小来比较，还可以根据你自定义属性来比较，很方便的

根据对象排序

            // 根据距离排序
/*            recordList.sort(new Comparator<Record>() {
                @Override
                public int compare(Record o1, Record o2) {
                    return o1.getInt("distance") - o2.getInt("distance");
                }
            });*/