Springboot+QueryDsl技术

1、添加依赖

<!--基于JPA-->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!--QueryDSL支持-->
<dependency><groupId>com.querydsl</groupId><artifactId>querydsl-apt</artifactId><scope>provided</scope>
</dependency>
<!--QueryDSL支持-->
<dependency><groupId>com.querydsl</groupId><artifactId>querydsl-jpa</artifactId>
</dependency>

2、添加配置

@Configuration
public class PeopleQueryConfig {@Beanpublic JPAQueryFactory jpaQuery(EntityManager entityManager) {return new JPAQueryFactory(entityManager);}
}

3、添加实体类

@Data
@Entity
@Table(name = "t_msg_log")
public class MsgLog extends PkUUID implements Serializable {private static final long serialVersionUID = -1479947068453421077L;@Column(name = "mobile", length = 16)private String mobile;@Column(name = "openid", length = 64)private String openid;@Column(name = "tsrname", length = 64)private String tsrname;@Column(name = "msg_direction", length = 2)@Convert(converter = MsgDirectionConverter.class)private MsgDirection msgDirection;@Column(name = "msg_type", length = 16)@Enumerated(EnumType.STRING)private MsgType msgType;@Column(name = "msg_channel", length = 2)@Convert(converter = MsgChannelConverter.class)private MsgChannel msgChannel;@Lob@Column(name = "msg_content")private String msgContent;@Column(name = "is_passive")private Boolean isPassive;@Column(name = "status", length = 2)@Convert(converter = MsgStatusConverter.class)private MsgStatus status;@Column(name = "send_time")private Date sendTime;@Column(name = "schedule_flag", length = 2)@Convert(converter = ScheduleFlagConverter.class)private ScheduleFlag scheduleFlag;@Column(name = "src_msg_id")private String srcMsgId;/*** enum*/public enum MsgType {text, image, video, voice, news, link, template, location}@RequiredArgsConstructorpublic enum MsgDirection implements ValuedEnum<String> {User2Agent("0"), Agent2User("1");@Getterprivate final String value;}@RequiredArgsConstructorpublic enum MsgChannel implements ValuedEnum<String> {SMS("0"), WECHAT("1");@Getterprivate final String value;}@RequiredArgsConstructorpublic enum MsgStatus implements ValuedEnum<String> {Success("1"), Failure("-1");@Getterprivate final String value;}@RequiredArgsConstructorpublic enum ScheduleFlag implements ValuedEnum<String> {ScheduledMsg("0"), InstantMsg("1");@Getterprivate final String value;}}

4、JPA-DAO类

DAO 类继承QueryDslPredicateExecutor

@Repository
public interface MsgLogRepository extends JpaRepository<MsgLog,String>,QueryDslPredicateExecutor<MsgLog>{}

5、Controller

@RestController
@RequestMapping("/msgLog/")
public class MsgLogController {private static final Logger LOGGER = LoggerFactory.getLogger(MsgLogController.class);@Autowiredprivate MsgLogRepository msgLogRepository;/*** 根据条件查询回话内容* @param predicate* @return*/@RequestMapping(value = "list")public List<MsgLogResp> list(@QuerydslPredicate(root = MsgLog.class) Predicate predicate){Iterable<MsgLog> msgLogs = msgLogRepository.findAll(predicate);LOGGER.info("msgLogs = "+ JsonUtil.toJson(msgLogs));List<MsgLog> msgLogList = new ArrayList<>();msgLogs.forEach((MsgLog msgLog)-> msgLogList.add(msgLog));return msgLogList.stream().map(new Function<MsgLog, MsgLogResp>() {@Nullable@Overridepublic MsgLogResp apply(@Nullable MsgLog msgLog) {return new MsgLogResp(msgLog);}}).collect(Collectors.toList());}}