去除相同车源

package com.pistonint.bpm.module.cars.entity.vo;

import lombok.Data;

import java.io.Serializable;
import java.util.Date;

/**
 * @description: YckCarsVO
 * @author: crs
 * @create: 2020-07-20 14:00
 * Copyright (c) 2019 广东数鼎科技有限公司 All rights reserved.
 */
@Data
public class YckCarsVO implements Serializable, Comparable<YckCarsVO> {
    private static final long serialVersionUID = 1L;
    private Integer car_id;            //车源id
    private String plate_number;    //车牌号
    private String vin;             //车架号(vin码)
    private String type_name;      //车型(名称)
    private String project_name;   //项目(名称)
    private String area_name;           //区域
    private String location;           //所在地(城市)
    private String warehouse_name;        //所在仓库名称
    private String warehouse_address;        //所在仓库地址
    private Integer is_confirm;    //精检状态 0:未检测 1：已检测
    private Integer operate_status;  //运营状态 0:自管仓在库
    private Integer is_stop;    //是否停售 1:是 -1:否
    private Integer is_sold;    //销售状态 0:待售
    private String car_sell_type; //车辆销售类型
    private Integer is_new_car;    //是否新车 1:是 0：否
    private Integer in_warehouse_time;  //入库(仓库)时间

    private String location_id;  //城市id

    private String warehouse_id;  //仓库id

    @Override
    public int compareTo(YckCarsVO o) {
        if (this.getCar_id() == null) {
            return 1;
        }
        if (this.getCar_id() != null && this.getCar_id().equals(o.car_id)) {
            return 0;
        }
        return this.getCar_id().compareTo(o.car_id);
    }
}