Java Spring数据存储库:";查找“;带有orderBy的方法获取错误的顺序
我有一个带有一些JPA存储库的Spring启动应用程序。 我在其中一个存储库接口中定义了以下方法:Java Spring数据存储库:";查找“;带有orderBy的方法获取错误的顺序,java,spring-boot,spring-data,spring-data-jpa,jpql,Java,Spring Boot,Spring Data,Spring Data Jpa,Jpql,我有一个带有一些JPA存储库的Spring启动应用程序。 我在其中一个存储库接口中定义了以下方法: public List<Post> findAllByOrderByPublishedOnDesc(); 存储库: public interface PostRepository extends JpaRepository<Post, Long> { public Post findBySourceUrl(String source
public List<Post> findAllByOrderByPublishedOnDesc();
存储库:
public interface PostRepository extends JpaRepository<Post, Long>
{
public Post findBySourceUrl(String sourceUrl);
public List<Post> findAllByOrderByPublishedOnDesc();
}
公共接口PostRepository扩展了JpaRepository
{
公共Post findBySourceUrl(字符串sourceUrl);
公共列表findAllByOrderByPublishedOnDesc();
}
测试:
公共类OrderByJPATest
{
@自动连线
postRepo;
PublicOrderByJPatest()
{
}
@试验
public void testOrderByDays()
{
//第一次尝试:年长1天
Post-newer=insertTestEntity(“newer”,LocalDateTime.of(2016,11,13,0,0));
Post-older=insertTestEntity(“older”,LocalDateTime.of(2016,11,12,0,0));
List ordered=postRepo.findAllByOrderByPublishedOnDesc();
ordered.stream().forEach((post)->log.info(“{}=>{}”,post.getSourceUrl(),post.getPublishedOn());
/*
输出:
更新=>2016-11-13T00:00
老年人=>2016-11-12T00:00
*/
assertTrue(ordered.get(0.getPublishedOn)()
.isAfter(ordered.get(1.getPublishedOn());
postRepo.deleteAll();
回购后冲水();
//第二次尝试:老了1分钟
更新=插入测试实体(“newerbymin”,LocalDateTime.of(2016,11,13,01,02));
older=插入测试实体(“olderbymin”,LocalDateTime.of(2016,11,13,01,01));
ordered=postRepo.findAllByOrderByPublishedOnDesc();
ordered.stream().forEach((post)->log.info(“{}=>{}”,post.getSourceUrl(),post.getPublishedOn());
/*
输出:
Olderbymin=>2016-11-13T01:01
newerbymin=>2016-11-13T01:02
*/
//这个断言失败了!
assertTrue(ordered.get(0.getPublishedOn)()
.isAfter(ordered.get(1.getPublishedOn());
}
private Post insertTestEntity(字符串url、LocalDateTime publishDate)
{
Text Text=新文本();
text.setValue(“测试…”);
Post Post=新Post();
post.setPublishedOn(publishDate);
post.setSourceUrl(url);
post.setText(文本);
返回回购后保存(post);
}
}
POM(依赖项):
com.atlassian.commonmark
普通商标
0.6.0
公地io
公地io
2.4
公地郎
公地郎
2.6
org.springframework.boot
弹簧靴起动器
org.springframework.boot
spring引导启动器数据jpa
org.springframework.boot
弹簧启动启动器数据rest
org.projectlombok
龙目
org.springframework.boot
弹簧启动安全
org.springframework.boot
弹簧启动装置
org.springframework.boot
SpringBootStarterWeb
org.springframework.boot
spring启动程序日志记录
org.thymeleaf.extras
thymeleaf-extras-Java8时间
com.h2数据库
氢
运行时
org.springframework.boot
弹簧起动试验
测试
org.springframework.security
弹簧安全性试验
测试
JPA默认情况下会将Java的LocalDateTime
映射到BLOB
,而不是DateTime
或时间戳
数据库不了解如何对BLOB执行日期/时间排序
@Column
注释或SQL脚本)创建架构hibernate-java8
依赖项添加到项目中执行上述步骤后,将进行正确的排序。您是否尝试映射到java.util.Date并查看这是否会改变行为?@neil stockton您使用的是哪个版本的Spring Boot?如果您已经覆盖了任何依赖版本,请告诉我。@punkrocker27ka我使用的是1.4.1.RELEASE,我的版本中没有排除或覆盖POM@JustinKSU有趣的是:从LocalDateTime切换到Date我得到了正确的顺序:
NewerbyMin=>Wed Dec 13 01:02:00 CET 3916 OlderbyMin=>Wed Dec 13 01:01:00 CET3916
您可以共享您的pom文件吗。我很好奇你是否带来了jackson-datatype-jsr310?我有hibernate-java8
,但它仍然不起作用。也许我错过了你回答的第一点。该列的合适定义是什么?你能举个例子吗?非常感谢。@EvilToad我在SQL for Java的LocalDateTime中使用了时间戳数据类型。看到这个完整的工作示例:钉住它!现在,它的工作如预期。非常感谢你的努力。
public interface PostRepository extends JpaRepository<Post, Long>
{
public Post findBySourceUrl(String sourceUrl);
public List<Post> findAllByOrderByPublishedOnDesc();
}
public class OrderByJPATest
{
@Autowired
PostRepository postRepo;
public OrderByJPATest()
{
}
@Test
public void testOrderByDays()
{
// First try: older by 1 day
Post newer = insertTestEntity("newer", LocalDateTime.of(2016, 11, 13, 0, 0));
Post older = insertTestEntity("older", LocalDateTime.of(2016, 11, 12, 0, 0));
List<Post> ordered = postRepo.findAllByOrderByPublishedOnDesc();
ordered.stream().forEach((post) -> log.info("{} => {}", post.getSourceUrl(), post.getPublishedOn()));
/*
output:
newer => 2016-11-13T00:00
older => 2016-11-12T00:00
*/
assertTrue(ordered.get(0).getPublishedOn()
.isAfter(ordered.get(1).getPublishedOn()));
postRepo.deleteAll();
postRepo.flush();
// Second try: older by 1 minute
newer = insertTestEntity("newerBy1Min", LocalDateTime.of(2016, 11, 13, 01, 02));
older = insertTestEntity("olderBy1Min", LocalDateTime.of(2016, 11, 13, 01, 01));
ordered = postRepo.findAllByOrderByPublishedOnDesc();
ordered.stream().forEach((post) -> log.info("{} => {}", post.getSourceUrl(), post.getPublishedOn()));
/*
output:
olderBy1Min => 2016-11-13T01:01
newerBy1Min => 2016-11-13T01:02
*/
// this assert fails!
assertTrue(ordered.get(0).getPublishedOn()
.isAfter(ordered.get(1).getPublishedOn()));
}
private Post insertTestEntity(String url, LocalDateTime publishDate)
{
Text text = new Text();
text.setValue("Testing...");
Post post = new Post();
post.setPublishedOn(publishDate);
post.setSourceUrl(url);
post.setText(text);
return postRepo.save(post);
}
}
<dependencies>
<dependency>
<groupId>com.atlassian.commonmark</groupId>
<artifactId>commonmark</artifactId>
<version>0.6.0</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<!--Additional dependencies -end-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-java8time</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>