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spring data jpa 自定义查询自动解析

上善若水2021-01-29 13:38:45【java技术交流】 3358人已围观

简介JpaRepositoryg会自动解析编写的接口,直接实现里面的方法.直接调用直接可用,还是非常强大的.规则: findBy(关键字)+属性名称(属性名称的首字母大写)+查询条件(首字母大写)

JpaRepositoryg会自动解析编写的接口,直接实现里面的方法.直接调用直接可用,还是非常强大的.
规则:
findBy(关键字)+属性名称(属性名称的首字母大写)+查询条件(首字母大写)

@Repository
public interface ArticleRepository extends JpaRepository<Article, Integer> {
    List<Article> findByTitle(String title);
    List<Article> findByTitleLike(String title);
    List<Article> findByCreateTimeBetween(LocalDateTime start, LocalDateTime end);
    List<Article> findByCreateTimeGreaterThanEqual(LocalDateTime start);
    List<Article> findByCreateTimeNotNull();

}

 @Test
    public void testFindByTitle(){
        List<Article> articles = articleRepository.findByTitle("该如何才能成功");
    }
    @Test
    public void testFindByTitleLike(){
        List<Article> articles = articleRepository.findByTitleLike("该如何"+'%');
    }
    @Test
    public void testFindByCreateTimeBetween(){
        LocalDateTime start=LocalDateTime.of(2019, Month.DECEMBER,17,16,39,44);
        LocalDateTime end=LocalDateTime.parse("2020-12-17 16:39:44", DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
        List<Article> articles = articleRepository.findByCreateTimeBetween(start,end);
    }
    @Test
    public void testFindByCreateTimeCreateTimeAfter(){
        LocalDateTime start=LocalDateTime.of(2019, Month.DECEMBER,17,16,39,44);
        List<Article> articles = articleRepository.findByCreateTimeGreaterThanEqual(start);
    }
    @Test
    public void testFindByCreateTimeNotNull(){
        List<Article> articles = articleRepository.findByCreateTimeNotNull();
    }

都是可以正常调用的.不存在这种findByCreateTimeAfterEqual大于等于的写法,程序会运行不起来

关键字	方法命名	sql where 字句
And	findByNameAndPwd	where name= ? and pwd =?
Or	findByNameOrSex	where name= ? or sex=?
Is,Equal	findById,	findByIdEquals
Between	findByIdBetween	where id between ? and ?
LessThan	findByIdLessThan	where id < ?
LessThanEqual	findByIdLessThanEquals	where id <= ?
GreaterThan	findByIdGreaterThan	where id > ?
GreaterThanEqual	findByIdGreaterThanEquals	where id > = ?
After	findByIdAfter	where id > ?
Before	findByIdBefore	where id < ?
IsNull	findByNameIsNull	where name is null
isNotNull,Not Null	findByNameNotNull	where name is not
Like	findByNameLike	where name like ?
NotLike	findByNameNotLike	where name not like ?
StartingWith	findByNameStartingWith	where name like ‘?%’
EndingWith	findByNameEndingWith	where name like ‘%?’
Containing	findByNameContaining	where name like ‘%?%’
OrderBy	findByIdOrderByXDesc	where id=? order by x desc
Not	findByNameNot	where name <> ?
In	findByIdIn(Collection<?> c)	where id in (?)
NotIn	findByIdNotIn(Collection<?> c)	where id not in (?)
TRUE	findByAaaTue	where aaa = true
FALSE	findByAaaFalse	where aaa = false
IgnoreCase	findByNameIgnoreCase	where UPPER(name)=UPPER(?)