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在JPA的@Query注解中使用limit条件(详解)

java 搞代码 4年前 (2022-01-05) 73次浏览 已收录 0个评论

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在@Query注解注释的JPQL语句中写limit语句是会报错的

unexpected token :limit near line ….

解决方法是讲@Query注解中的limit语句去掉,然后传一个Pageable pageable=new PageRequest(offset,limit)进去

示例代码:

controller

 import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping(value = "/misaka") public class MisakaController { @Autowired private MisakaService misakaService; @RequestMapping(value = "/list") public List getBaselineOverview() { return misakaService.getMisaka(); } } 

service

 import java.util.List; public interface MisakaService { List getMisaka(); } 

serviceimpl

 im<strong style="color:transparent">来源gao@daima#com搞(%代@#码@网</strong>port java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Pageable; import org.springframework.data.domain.Sort.Direction; import org.springframework.stereotype.Service; @Service public class MisakaServiceImpl implements MisakaService { @Autowired private MisakaDao misakaDao; @Override public List getMisaka() { Pageable pageable = new PageRequest(1, 2, Direction.ASC, "name"); Page misakaPage = misakaDao.search(pageable); List misakaList = misakaPage.getContent(); System.out.println(misakaList); return misakaList; } } 

dao

 import org.springframework.data.domain.Page; import org.springframework.data.domain.Pageable; import org.springframework.data.jpa.repository.Query; import org.springframework.data.repository.CrudRepository; public interface MisakaDao extends CrudRepository { @Query("SELECT m FROM Misaka m WHERE m.id>4") Page search(Pageable pageable); } 

model

 import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name = "t_test") public class Misaka { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @Column(name = "name") private String name; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "Misaka [id=" + id + ", name=" + name + "]"; } } 

数据库t_test

id name
1 m1
2 m2
3 m3
4 m4
5 m5
6 m6
7 m7
8 m8
9 m9

输出

 Hibernate: select count(misaka0_.id) as col_0_0_ from t_test misaka0_ where misaka0_.id>4 Hibernate: select misaka0_.id as id1_29_, misaka0_.name as name2_29_ from t_test misaka0_ where misaka0_.id>4 order by misaka0_.name asc limit ?, ? [Misaka [id=7, name=m7], Misaka [id=8, name=m8]] 

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