Springboot+QueryDsl實現(xiàn)融合數(shù)據(jù)查詢

更新時間：2023年08月25日 09:48:07 作者：天道酬勤的博客

這篇文章主要將介紹的是 Springboot 使用 QueryDsl 實現(xiàn)融合數(shù)據(jù)查詢,文中有詳細(xì)的代碼講解,對 SpringBoot?Querydsl?查詢操作感興趣的朋友一起看看吧

Springboot+QueryDsl技術(shù)

1、添加依賴

<!--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 {
  @Bean
  public JPAQueryFactory jpaQuery(EntityManager entityManager) {
    return new JPAQueryFactory(entityManager);
  }
}

3、添加實體類

@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
  }
  @RequiredArgsConstructor
  public enum MsgDirection implements ValuedEnum<String> {
    User2Agent("0"), Agent2User("1");
    @Getter
    private final String value;
  }
  @RequiredArgsConstructor
  public enum MsgChannel implements ValuedEnum<String> {
    SMS("0"), WECHAT("1");
    @Getter
    private final String value;
  }
  @RequiredArgsConstructor
  public enum MsgStatus implements ValuedEnum<String> {
    Success("1"), Failure("-1");
    @Getter
    private final String value;
  }
  @RequiredArgsConstructor
  public enum ScheduleFlag implements ValuedEnum<String> {
    ScheduledMsg("0"), InstantMsg("1");
    @Getter
    private final String value;
  }
}

4、JPA-DAO類

DAO 類繼承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);
  @Autowired
  private MsgLogRepository msgLogRepository;
  /**
   * 根據(jù)條件查詢回話內(nèi)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
      @Override
      public MsgLogResp apply(@Nullable MsgLog msgLog) {
        return new MsgLogResp(msgLog);
      }
    }).collect(Collectors.toList());
  }
}

到此這篇關(guān)于Springboot+QueryDsl實現(xiàn)融合數(shù)據(jù)查詢的文章就介紹到這了,更多相關(guān)Springboot QueryDsl數(shù)據(jù)查詢內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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