list根據對象屬性排序

package cn.wzq;

import cn.hutool.core.util.StrUtil;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

/**
 * @ClassName ListSort
 * @Description: TODO
 * @Author wzq
 * @Date 2019/11/11
 * @Version V1.0
 **/
public class ListSortTest {

    public static void main(String[] args) {
        TestA testA1 = new TestA("老張", "3");
        TestA testA2 = new TestA("老李", "1");
        TestA testA3 = new TestA("老王", "2");
        List<TestA> list = new ArrayList<TestA>();
        list.add(testA1);
        list.add(testA2);
        list.add(testA3);
        System.out.println("排序前--:" + list.toString());
        Collections.sort(list, new Comparator<TestA>() {
            public int compare(TestA o1, TestA o2) {
                //升序
                return o1.getAge().compareTo(o2.getAge());
            }
        });
        System.out.println("升序排序後--:" + list.toString());

        Collections.sort(list, new Comparator<TestA>() {
            public int compare(TestA o1, TestA o2) {
                //升序
                return o2.getAge().compareTo(o1.getAge());
            }
        });
        System.out.println("降序排序後--:" + list.toString());

    }


}
class TestA {
    String name;
    String age;

    public TestA() {
    }

    public TestA(String name, String age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "TestA{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}