在JPA的@Query注解中使用limit条件(详解)

2024-02-20 17:39:03 291

在@Query注解注释的JPQL语句中写limit语句是会报错的

unexpectedtoken:limitnearline....

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

示例代码：

controller

importjava.util.List;

importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.web.bind.annotation.RequestMapping;
importorg.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value="/misaka")
publicclassMisakaController
{
@Autowired
privateMisakaServicemisakaService;

@RequestMapping(value="/list")
publicListgetBaselineOverview()
{
returnmisakaService.getMisaka();
}

}

service

importjava.util.List;

publicinterfaceMisakaService
{
ListgetMisaka();
}

serviceimpl

importjava.util.List;

importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.data.domain.Page;
importorg.springframework.data.domain.PageRequest;
importorg.springframework.data.domain.Pageable;
importorg.springframework.data.domain.Sort.Direction;
importorg.springframework.stereotype.Service;

@Service
publicclassMisakaServiceImplimplementsMisakaService
{
@Autowired
privateMisakaDaomisakaDao;

@Override
publicListgetMisaka()
{
Pageablepageable=newPageRequest(1,2,Direction.ASC,"name");
PagemisakaPage=misakaDao.search(pageable);
ListmisakaList=misakaPage.getContent();
System.out.println(misakaList);
returnmisakaList;
}
}

dao

importorg.springframework.data.domain.Page;
importorg.springframework.data.domain.Pageable;
importorg.springframework.data.jpa.repository.Query;
importorg.springframework.data.repository.CrudRepository;

publicinterfaceMisakaDaoextendsCrudRepository
{
@Query("SELECTmFROMMisakamWHEREm.id>4")
Pagesearch(Pageablepageable);
}

model

importjavax.persistence.Column;
importjavax.persistence.Entity;
importjavax.persistence.GeneratedValue;
importjavax.persistence.GenerationType;
importjavax.persistence.Id;
importjavax.persistence.Table;

@Entity
@Table(name="t_test")
publicclassMisaka
{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
privateLongid;

@Column(name="name")
privateStringname;

publicLonggetId()
{
returnid;
}

publicvoidsetId(Longid)
{
this.id=id;
}

publicStringgetName()
{
returnname;
}

publicvoidsetName(Stringname)
{
this.name=name;
}

@Override
publicStringtoString()
{
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:selectcount(misaka0_.id)ascol_0_0_fromt_testmisaka0_wheremisaka0_.id>4
Hibernate:selectmisaka0_.idasid1_29_,misaka0_.nameasname2_29_fromt_testmisaka0_wheremisaka0_.id>4orderbymisaka0_.nameasclimit?,?
[Misaka[id=7,name=m7],Misaka[id=8,name=m8]]

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在JPA的@Query注解中使用limit条件(详解)

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