Hibernate 如何生成 JPA 的 Metamodel

要在 Hibernate 中生成 JPA 的 Metamodel。

你只需要在 pom.xml 进行下面的 2 个操作就可以了。

添加依赖

在 POM 中添加下面的依赖。

org.hibernatehibernate-jpamodelgen5.6.3.Final

编译插件

在编译插件中，添加编译参数

org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor

完整的编译参数如下图

注意上图中的插件配置。

进行编译

运行命令：mvn compile

输出如下：

PS C:\WorkDir\USRealEstate\Source-Code\mls-common> mvn compile[INFO] Scanningforprojects...[INFO] [INFO] --------------------< com.ossez.usreio:mls-common >---------------------[INFO] Building Mls-Common0.0.1-SNAPSHOT[INFO] --------------------------------[ jar ]---------------------------------[INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ mls-common ---[INFO] Using'UTF-8'encoding to copy filtered resources.[INFO] Copying5resources[INFO][INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ mls-common ---[INFO] Changes detected - recompiling the module![INFO] Compiling35source files to C:\WorkDir\USRealEstate\Source-Code\mls-common\target\classes[INFO] /C:/WorkDir/USRealEstate/Source-Code/mls-common/src/main/java/com/ossez/usreio/mls/common/dao/factories/ListingMlsPhotoFactory.java: Some input files useoroverridea deprecated API.[INFO] /C:/WorkDir/USRealEstate/Source-Code/mls-common/src/main/java/com/ossez/usreio/mls/common/dao/factories/ListingMlsPhotoFactory.java: Recompilewith-Xlint:deprecationfordetails.[INFO] /C:/WorkDir/USRealEstate/Source-Code/mls-common/src/main/java/com/ossez/usreio/mls/common/dao/factories/ListingMlsPhotoFactory.java: Some input files useuncheckedorunsafeoperations.[INFO] /C:/WorkDir/USRealEstate/Source-Code/mls-common/src/main/java/com/ossez/usreio/mls/common/dao/factories/ListingMlsPhotoFactory.java: Recompilewith-Xlint:uncheckedfordetails.[INFO] ------------------------------------------------------------------------[INFO] BUILD SUCCESS[INFO] ------------------------------------------------------------------------[INFO] Total time:2.738s[INFO] Finished at:2022-01-12T16:52:51-05:00[INFO] ------------------------------------------------------------------------PS C:\WorkDir\USRealEstate\Source-Code\mls-common>

然后 Maven 将会在 target 文件夹中生成 Metamodel 的源代码。

生成的源代码如上图。

https://www.ossez.com/t/hibernate-jpa-metamodel/13849