如何使用Java比较器自定义订单/排序json对象? [英] How to custom order/sort json objects using java comparator?

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问题描述

我有对象的json数组,每个对象中都有"offer_name"字段.我想按自定义定义的"offer_name"顺序对json对象进行排序/排序.请让我知道我该如何实现?

I have json array of objects which will have "offer_name" field in every object. I would like to order/sort my json objects by custom defined "offer_name" order. Please let me know how can I achieve this?

我需要按以下顺序订购商品

I need to order offers in below order

enum OffersOrder { BEST("BEST"),GOLD("GOLD"),RISK("RISK"),STANDARD("STANDARD"),PUBLIC("PUBLIC");
String sound;    
OffersOrder(String s) { sound = s; }
}

推荐答案

这是您可以执行的操作:

This is how you can do that:

List<OffersOrder> l = new ArrayList<>();

// code to populate your list
...

// sorting
java.util.Collections.sort(l, new Comparator<OffersOrder>(){
    @Override
    public int compare(OffersOrder o1, OffersOrder o2) {
        // this method should return a negative value if o1 < o2
        // this method should return 0 if o1 == o2
        // this method should return a positive value if o1 > o2
        return 0;
    }
});

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