Stream distinct根据list某个字段去重的解决方案

List<UserPojo> users = new ArrayList<>();
//第一个user和第4个user应该是相等的，因为它们的name和address相等
					//id   name     address    age
users.add(new UserPojo(1, "daji", "山东省青岛市", 19));
users.add(new UserPojo(2, "daji2", "山东省济南市", 20));
users.add(new UserPojo(3, "daji3", "北京市", 22));
users.add(new UserPojo(4, "daji, "山东省青岛市", 23));

@Override
    public boolean equals(Object o) {
        UserPojo thisPojo = (UserPojo) o;
        //只有name 和 address 相等，也算相等
        if (this.getName().equals(thisPojo.getName()) && this.getAddress().equals(thisPojo.getAddress())){
            return true;
        }else {
            return false;
        }
    }

@Override
    public int hashCode() {
        //根据name和address重新计算hashcode
        int result = getName().hashCode();
        //17是死值, jdk建议用17
        result = 17 * result + getAddress().hashCode();
        return result;
    }

users = users.stream().distinct().collect(Collectors.toList());

@Test
    void test15() {
        List<UserPojo> users = new ArrayList<>();
        //第一个user和第4个user应该是相等的，因为它们的name和address相等
        users.add(new UserPojo(1, "daji", "山东省青岛市", 19));
        users.add(new UserPojo(2, "daji2", "山东省济南市", 20));
        users.add(new UserPojo(3, "daji3", "北京市", 22));
        users.add(new UserPojo(4, "daji", "山东省青岛市", 23));
        /*
            解决方案：使用stream的distinct去重
            1、 新建一个子类，继承UserPojo
            2、 重写该子类的 equals方法和hashcode 方法
            3、 将父类的全部数据灌入子类，对子类 使用stream的distinct去重
         */
        List<OverrideEqualsPojo> overrideEqualsPojos = new ArrayList<>();
        for (UserPojo user : users) {
            OverrideEqualsPojo overrideEqualsPojo = new OverrideEqualsPojo();
            BeanUtils.copyProperties(user,overrideEqualsPojo);
            overrideEqualsPojos.add(overrideEqualsPojo);
        }
        overrideEqualsPojos = overrideEqualsPojos.stream().distinct().collect(Collectors.toList());
        System.out.println(overrideEqualsPojos);
    }

package com.daji.stream;
import lombok.AllArgsConstructor;
import lombok.Data;
import java.util.Objects;
public class OverrideEqualsPojo extends UserPojo{
    public OverrideEqualsPojo(int id, String name, String address, int age) {
        super(id, name, address, age);
    }
    public OverrideEqualsPojo() {
    }
    @Override
    public boolean equals(Object o) {
        OverrideEqualsPojo thisPojo = (OverrideEqualsPojo) o;
        //只有name 和 address 相等，也算相等
        if (this.getName().equals(thisPojo.getName()) && this.getAddress().equals(thisPojo.getAddress())){
            return true;
        }else {
            return false;
        }
    }
    @Override
    public int hashCode() {
        //根据name和address重新计算hashcode
        int result = getName().hashCode();
        //17是死值, jdk建议用17
        result = 17 * result + getAddress().hashCode();
        return result;
    }
}