@Data
@ApiModel(value = "EstateListVo", description = "小区列表")
public class EstateListVo implements Serializable {private static final long serialVersionUID = 4969589185044044369L;@ApiModelProperty("小区ID")private Long estateId;@ApiModelProperty("小区编号")private String estateNo;@ApiModelProperty("小区名称")private String estateName;@ApiModelProperty("苑ID")private Long courtId;@ApiModelProperty("苑名称")private String courtName;@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;EstateListVo that = (EstateListVo) o;return Objects.equals(estateId, that.estateId) &&Objects.equals(courtId, that.courtId);}@Overridepublic int hashCode() {return Objects.hash(estateId, courtId);}
}
@Overridepublic List<EstateListVo> getEstateCourtList( String communityCode, String estateName) {List<Long> estateIdList = new ArrayList<>();List<EstateListVo> estateCourtList = baseMapper.getEstateCourtList(communityCode, estateName, estateIdList);Set<EstateListVo> estateCourtEmptySet = new HashSet<>();for( EstateListVo tempEstate : estateCourtList ){estateCourtEmptySet.add(tempEstate);//加一个空格苑LambdaQueryWrapper<House> wrapper = new LambdaQueryWrapper<>();wrapper.eq(House::getEstateId, tempEstate.getEstateId());wrapper.isNull(House::getCourtId);List<House> houseList = houseMapper.selectList(wrapper);if(CollectionUtils.isNotEmpty(houseList)){EstateListVo estateListVo = new EstateListVo();estateListVo.setCourtId(null);estateListVo.setCourtName(null);estateListVo.setEstateId((tempEstate.getEstateId()));estateListVo.setEstateName(tempEstate.getEstateName());estateListVo.setEstateNo(tempEstate.getEstateNo());estateCourtEmptySet.add(estateListVo);}}//结果List<EstateListVo> resultList = new ArrayList<>();for( EstateListVo tempEstate : estateCourtEmptySet ){String courtName = tempEstate.getCourtName();if(StringUtils.isBlank(courtName)){tempEstate.setCourtName("");}resultList.add(tempEstate);}//rankList.stream().sorted(Comparator.comparing(类::属性一).reversed().thenComparing(类::属性二));//先以属性一升序,升序结果进行属性一降序,再进行属性二升序resultList.sort(Comparator.comparing(EstateListVo::getEstateName).thenComparing(EstateListVo::getCourtName));;return resultList;}@Data
@AllArgsConstructor
public class User1 {private String name;private String birthday;}
public class SortUser {public static void main(String[] args) {List<User1> list = new ArrayList<>();
// list.add(new User1("张三", "1987-05-23 12:34:07"));
// list.add(new User1("李四", "1977-05-23 05:04:07"));
// list.add(new User1("王五", "1987-05-23 09:34:07"));list.add(new User1("王五1", "2020-03-01"));list.add(new User1("王五2", "2020-12-31"));list.add(new User1("王五3", "2020-10-23"));list.add(new User1("王五4", "2020-05-01"));list.add(new User1("王五5", "2020-10-31"));//(1)顺序排列list.sort(Comparator.comparing(User1::getBirthday));//(2)输出listSystem.out.println("排序后1："+list);//(3)倒序排列Collections.reverse(list);//(4)输出listSystem.out.println("排序后2："+list);}
}
工作中遇到一个问题，调用第三方接口返回的数据没有按时间倒序排列，测试说要加，然后在网上找到一个解决办法，这里记录一下
需求：
- 如下图列表，按生日进行倒序排列
编辑
用户类
@Data
@AllArgsConstructor
public class User {
private String name;
private String birthday;
}
测试类
@SpringBootTest
@Slf4j
public class TestSort {
private List<User> list = new ArrayList<>();
@BeforeEach
void setUp() {
list.add(new User("张三", "1987-05-23 12:34:07"));
list.add(new User("李四", "1977-05-23 05:04:07"));
list.add(new User("王五", "1987-05-23 09:34:07"));
}
@Test
@DisplayName("测试排序")
void test() {
// (1)顺序排列
list.sort(Comparator.comparing(User::getBirthday));
// (2)倒序排列
Collections.reverse(list); //
(3)输出list
log.info("排序后："+list);
}
}
测试结果
编辑
参考资料
Java实现 根据list列表元素的时间字段进行排序
)
