spring比较器的使用_spring中自定义比较器-优快云博客

本文介绍了如何在Spring Boot中使用`Ordered`接口实现自定义排序的Score类，并展示了如何通过OrderComparator进行对象排序。Score1和Score2类分别实现了不同的order值，实例化并演示了它们在列表中的排序过程。

                    
                        
                    
                    代码实现package com.yzy.springdemo.property;

import org.springframework.core.OrderComparator;
import org.springframework.core.Ordered;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author yzy
 * @date 2022/11/16 15:01
 **/
public class Score implements Ordered {
    @Override
    public int getOrder() {
        return 0;
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName() + ",order = " + getOrder();
    }
}

class Score1 implements Ordered {
    @Override
    public int getOrder() {
        return 1;
    }
    @Override
    public String toString() {
        return this.getClass().getSimpleName() + ",order = " + getOrder();
    }
}

class Score2 implements Ordered {
    @Override
    public int getOrder() {
        return 2;
    }
    @Override
    public String toString() {
        return this.getClass().getSimpleName() + ",order = " + getOrder();
    }
    
    public static void main(String[] args) {
        Score score = new Score();
        Score1 score1 = new Score1();
        Score2 score2 = new Score2();
        OrderComparator comparator = new OrderComparator();
        // score1的getOrder 比 score的getOrder大，故这里返回1
        System.out.println(comparator.compare(score1, score));

        List<Object> list = new ArrayList<>();
        list.add(score);
        list.add(score1);
        list.add(score2);
        // 按order值升序排序
        list.sort(comparator);
        System.out.println(list);
    }
}

输出结果：




                