错误：无法访问 JPA 上的 MappedSuperclass

Question

我正在从 Spring boot 2.7 迁移到 Spring boot 3.0，我发现了一个

error: cannot access MappedSuperclass

，我怀疑它来自 JPA，我已经更改了 jakarta 的依赖项和所有 javax，但我仍然遇到以下错误，我在 IDE 中没有显示任何错误，只是在运行时收到日志。

这是错误，我只是分享一部分，因为我不太大，但都遵循相同的结构，只是功能不同。

> Task :compileJava FAILED
warning: unknown enum constant GenerationType.IDENTITY
  reason: class file for javax.persistence.GenerationType not found
warning: unknown enum constant GenerationType.IDENTITY
warning: unknown enum constant FetchType.LAZY
  reason: class file for javax.persistence.FetchType not found
warning: unknown enum constant CascadeType.ALL
  reason: class file for javax.persistence.CascadeType not found
warning: unknown enum constant GenerationType.IDENTITY
warning: unknown enum constant FetchType.LAZY
warning: unknown enum constant CascadeType.ALL
warning: unknown enum constant GenerationType.IDENTITY
warning: unknown enum constant GenerationType.IDENTITY
error: cannot access MappedSuperclass
  class file for javax.persistence.MappedSuperclass not found
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:24: error: cannot find symbol
    payload.setCosAttachmentId(disputeAttachment.getAttachmentObjectStorageId());
           ^
  symbol:   method setCosAttachmentId(String)
  location: variable payload of type AddAttachmentPayload
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:25: error: cannot find symbol
unknown enum constant GenerationType.IDENTITY

    payload.setEsAttachmentRefId(disputeAttachmentEventData.getEsAttachmentRefId());
           ^
  symbol:   method setEsAttachmentRefId(String)
  location: variable payload of type AddAttachmentPayload
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:26: error: cannot find symbol
    payload.setFileName(disputeAttachment.getFileName());
unknown enum constant FetchType.LAZY

           ^
  symbol:   method setFileName(String)
unknown enum constant CascadeType.ALL

  location: variable payload of type AddAttachmentPayload
unknown enum constant GenerationType.IDENTITY

unknown enum constant FetchType.LAZY

/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:27: error: cannot find symbol
unknown enum constant CascadeType.ALL

unknown enum constant GenerationType.IDENTITY

    payload.setFederalFlag(disputeAttachmentEventData.getFederalFlag());
           ^
cannot access MappedSuperclass

  symbol:   method setFederalFlag(String)
  location: variable payload of type AddAttachmentPayload
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:28: error: cannot find symbol
    payload.setTenantId(tenantId);
           ^
  symbol:   method setTenantId(String)
  location: variable payload of type AddAttachmentPayload
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:29: error: cannot find symbol
    payload.setCreatedBy(entitlement.getData().getEmail());
           ^
  symbol:   method setCreatedBy(String)
  location: variable payload of type AddAttachmentPayload
/Users/paolabeltran/Documents/GitHub/ar-dispute-es-updater/src/main/java/com/ibm/ar/dispute/es/updater/utils/AttachmentPayloadConverter.java:36: error: cannot find symbol
    String createdByMail = user.getContent().getMail()[0];
                               ^
  symbol:   method getContent()
  location: variable user of type BluepagesResponse

我收到错误的所有类都具有相同的结构，所以我只展示一个示例

import jakarta.persistence.Entity;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;


@Setter
@Getter
@NoArgsConstructor
@AllArgsConstructor
public class AddAttachmentPayload {

  private String cosAttachmentId;

  private String esAttachmentRefId;

  private String fileName;

  private String createdBy;

  private String federalFlag;

  private String tenantId;

}

这是我在 build.gradle 的依赖项

 dependencies {
    // Spring dependencies
    implementation('org.springframework.boot:spring-boot-starter-web')
    implementation('org.springframework.boot:spring-boot-starter-validation')
    implementation('org.springframework.boot:spring-boot-starter-security')
    implementation('org.springframework.boot:spring-boot-starter-data-jpa')
    implementation('org.springframework.boot:spring-boot-starter-actuator')
    implementation('org.springframework.boot:spring-boot-starter-data-redis')
    annotationProcessor("org.springframework.boot:spring-boot-starter-data-jpa")

    // Querydsl
    //implementation group: 'com.querydsl', name: 'querydsl-jpa', version: querydslVersion
    implementation("com.querydsl:querydsl-jpa:${querydslVersion}:jakarta")
    implementation group: 'com.querydsl', name: 'querydsl-sql', version: querydslVersion
    implementation group: 'com.querydsl', name: 'querydsl-sql-spring', version: querydslVersion
    implementation group: 'com.querydsl', name: 'querydsl-apt', version: querydslVersion
    implementation group: 'com.querydsl', name: 'querydsl-core', version: querydslVersion

    annotationProcessor("com.querydsl:querydsl-apt:${querydslVersion}:jakarta")
    annotationProcessor("jakarta.persistence:jakarta.persistence-api:3.1.0")
}

Answer 1

我也遇到过这个错误，由于这个导入（MappedSuperClass），lombok 的注释处理器中断，因此 getter 和 setter 出现错误。只需在导入 MappedSuperClass 而不是 jakarta 时使用 javax，这些错误就会消失。您可以使用 jakarta 进行其他进口，但以下情况除外：

 javax.sql. 
 javax.net.
 javax.xml.

而且它们工作得很好。

您可以通过在 pom 中包含以下内容来使用 MappedSuperClass 的 javax import：

<dependency>
    <groupId>javax.persistence</groupId>
    <artifactId>javax.persistence-api</artifactId>
    <version>2.2</version>
</dependency>