Kotlin使用SpringData Jpa定制存储库

这是我的代码。 我定制了我的存储库。

interface ChapterDao { fun test(novelId:String):List<Chapter> } class ChapterDaoImpl constructor(@PersistenceContext var entityManager: EntityManager){ fun test(novelId: String): List<Chapter> { val query = entityManager.createNativeQuery("select c.name, c.number from chapter c where c.novel.id = $novelId") val resultList = query.resultList as Array<Array<Any>> var chapterList:ArrayList<Chapter> = ArrayList<Chapter>() for (item in resultList){ chapterList.add(Chapter(item.get(0) as String,item.get(1) as Int)) } return chapterList } } interface ChapterRepository : CrudRepository<Chapter, String>, ChapterDao { } 

Chapter码是：

 package com.em248.entity; import com.fasterxml.jackson.annotation.JsonIgnore import com.fasterxml.jackson.annotation.JsonInclude import java.util.* import javax.persistence.* @Entity @Table(name = "chapter") @com.fasterxml.jackson.annotation.JsonInclude(JsonInclude.Include.NON_EMPTY) class Chapter { @Id var id: String = UUID.randomUUID().toString() var number: Int = -1 var name: String = "" @Column(columnDefinition = "text") var content: String? = "" @Temporal(TemporalType.TIMESTAMP) var createDate: Date = Date() @ManyToOne @JoinColumn(name = "novel_id") @JsonIgnore var novel: Novel = Novel(); constructor() constructor(name: String, number: Int) constructor(number: Int, name: String, content: String?, createDate: Date, novel: Novel) { this.number = number this.name = name if (content != null) this.content = content this.createDate = createDate this.novel = novel } } 

但是当使用test函数时，会抛出一个错误：

 Caused by: org.springframework.data.mapping.PropertyReferenceException: No property test found for type Chapter! at org.springframework.data.mapping.PropertyPath.lambda$new$0(PropertyPath.java:82) ~[spring-data-commons-2.0.0.M3.jar:na] at java.util.Optional.orElseThrow(Optional.java:290) ~[na:1.8.0_111] at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:82) ~[spring-data-commons-2.0.0.M3.jar:na] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:304) ~[spring-data-commons-2.0.0.M3.jar:na] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:284) ~[spring-data-commons-2.0.0.M3.jar:na] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) ~[spring-data-commons-2.0.0.M3.jar:na] 

我搜索如何实现自定义存储库，但我没有看到我的代码的区别？

Answer 1

将ChapterDaoImpl重命名为ChapterRepositoryImpl 。

Spring Data查找以存储库接口+ Impl命名的自定义实现。

您基于自定义界面命名实现。