Hibernate 使用maven处理器插件生成JPA元模型文件-什么是方便的重新生成方法？

我正在尝试使用maven处理器插件生成JPA元模型java文件，我将pom.xml设置如下

<plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <compilerArgument>-proc:none</compilerArgument>
        </configuration>
    </plugin>
    <plugin>
        <groupId>org.bsc.maven</groupId>
        <artifactId>maven-processor-plugin</artifactId>
        <executions>
            <execution>
                <id>process</id>
                <goals>
                    <goal>process</goal>
                </goals>
                <phase>generate-sources</phase>
                <configuration>
                    <!-- source output directory -->
                    <outputDirectory>${basedir}/src/main/java</outputDirectory>
                    <processors>
                        <processor>org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor</processor>
                    </processors>
                    <overwrite>true</overwrite>
                </configuration>
            </execution>
        </executions>
    </plugin>

maven编译器插件
1.8
1.8
-过程：无
org.bsc.maven
maven处理器插件
过程
过程
生成源
${basedir}/src/main/java
org.hibernate.jpamodelgen.jpametamodelenticyprocessor
真的

实际上，我想将元模型文件（Entity.java）生成到相应实体（Entity.java）的相同包中。因此，我在插件中设置outputDirectory为

<outputDirectory>${basedir}/src/main/java</outputDirectory>

${basedir}/src/main/java

第一次运行是可以的，但是在以后执行元模型java文件重新生成时，插件总是会出现文件复制错误

我的问题是 -有没有办法配置插件，以便在重新生成时覆盖现有文件

事实上，我们需要努力

在任何重新生成之前，我必须删除所有生成的文件

我可以将outputDirectory指向/target中的另一个文件夹，每次运行Maven时，这个位置都是干净的，但是 导致手动将生成的元模型文件复制到源文件夹 用于重新生成后的更新

---

这两个都很不方便，我希望你们能给我一个合适的解决方案。

合适的解决方案是生成的源应该在目标文件夹中，不应该放在源文件夹或SCM系统中

当然，通过将生成的源代码放入目标中，您将面临IDE中的问题，因为找不到相关代码。因此，您可以添加buildhelpermaven插件，从目标目录动态添加文件夹

<plugin>
    <groupId>org.bsc.maven</groupId>
    <artifactId>maven-processor-plugin</artifactId>
    <executions>
        <execution>
            <id>process</id>
            <goals>
                <goal>process</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
                <!-- source output directory -->
                <outputDirectory>${project.build.directory}/generated-sources/java/jpametamodel</outputDirectory>
                <processors>
                    <processor>org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor</processor>
                </processors>
                <overwrite>true</overwrite>
            </configuration>
        </execution>
    </executions>
</plugin>
<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <executions>
        <execution>
            <id>add-source</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>${project.build.directory}/generated-sources/java/jpametamodel</source>
                </sources>
            </configuration>
        </execution>
    </executions>
 </plugin>

org.bsc.maven
maven处理器插件
过程
过程
生成源
${project.build.directory}/generated sources/java/jpametamodel
org.hibernate.jpamodelgen.jpametamodelenticyprocessor
真的
org.codehaus.mojo
构建助手maven插件
添加源
生成源
添加源
${project.build.directory}/generated sources/java/jpametamodel

我还有一个可行的解决方案，我想与其他人分享。所以我希望这是正确的地方

代码可以在GitHub上找到

功能：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.github.stefanheimberg</groupId>
    <artifactId>jpa21-maven-metagen</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <profiles>
        <profile>
            <id>hibernate</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <hibernate.version>5.0.3.Final</hibernate.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.hibernate</groupId>
                    <artifactId>hibernate-jpamodelgen</artifactId>
                    <version>${hibernate.version}</version>
                    <scope>provided</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <id>eclipselink</id>
            <activation>
                <activeByDefault>false</activeByDefault>
            </activation>
            <properties>
                <eclipselink.version>2.6.1</eclipselink.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.eclipse.persistence</groupId>
                    <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
                    <version>${eclipselink.version}</version>
                    <scope>provided</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <id>m2e</id>
            <activation>
                <property>
                    <name>m2e.version</name>
                </property>
            </activation>
            <build>
                <pluginManagement>
                    <plugins>
                        <!--This plugin's configuration is used to store Eclipse m2e settings 
                        only. It has no influence on the Maven build itself. -->
                        <plugin>
                            <groupId>org.eclipse.m2e</groupId>
                            <artifactId>lifecycle-mapping</artifactId>
                            <version>1.0.0</version>
                            <configuration>
                                <lifecycleMappingMetadata>
                                    <pluginExecutions>
                                        <pluginExecution>
                                            <pluginExecutionFilter>
                                                <groupId>
                                                    org.codehaus.mojo
                                                </groupId>
                                                <artifactId>
                                                    build-helper-maven-plugin
                                                </artifactId>
                                                <versionRange>
                                                    [1.9.1,)
                                                </versionRange>
                                                <goals>
                                                    <goal>add-source</goal>
                                                </goals>
                                            </pluginExecutionFilter>
                                            <action>
                                                <execute>
                                                    <runOnConfiguration>true</runOnConfiguration>
                                                    <runOnIncremental>true</runOnIncremental>
                                                </execute>
                                            </action>
                                        </pluginExecution>
                                    </pluginExecutions>
                                </lifecycleMappingMetadata>
                            </configuration>
                        </plugin>
                    </plugins>
                </pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.codehaus.mojo</groupId>
                        <artifactId>build-helper-maven-plugin</artifactId>
                        <version>1.9.1</version>
                        <executions>
                            <execution>
                                <id>add-source</id>
                                <phase>generate-sources</phase>
                                <goals>
                                    <goal>add-source</goal>
                                </goals>
                                <configuration>
                                    <sources>
                                        <source>${project.build.directory}/generated-sources/annotations/</source>
                                    </sources>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

• JPA 2.1
• Hibernate元模型生成器示例
• EclipseLink元模型生成器示例
• IntelliJ（用14.1.4测试）和NetBeans（用8.1测试）的最小Maven配置
• Eclipse的M2E解决方案（使用4.5.1进行测试）（自动配置文件激活）

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.github.stefanheimberg</groupId>
    <artifactId>jpa21-maven-metagen</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <profiles>
        <profile>
            <id>hibernate</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <hibernate.version>5.0.3.Final</hibernate.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.hibernate</groupId>
                    <artifactId>hibernate-jpamodelgen</artifactId>
                    <version>${hibernate.version}</version>
                    <scope>provided</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <id>eclipselink</id>
            <activation>
                <activeByDefault>false</activeByDefault>
            </activation>
            <properties>
                <eclipselink.version>2.6.1</eclipselink.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.eclipse.persistence</groupId>
                    <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
                    <version>${eclipselink.version}</version>
                    <scope>provided</scope>
                </dependency>
            </dependencies>
        </profile>

        <profile>
            <id>m2e</id>
            <activation>
                <property>
                    <name>m2e.version</name>
                </property>
            </activation>
            <build>
                <pluginManagement>
                    <plugins>
                        <!--This plugin's configuration is used to store Eclipse m2e settings 
                        only. It has no influence on the Maven build itself. -->
                        <plugin>
                            <groupId>org.eclipse.m2e</groupId>
                            <artifactId>lifecycle-mapping</artifactId>
                            <version>1.0.0</version>
                            <configuration>
                                <lifecycleMappingMetadata>
                                    <pluginExecutions>
                                        <pluginExecution>
                                            <pluginExecutionFilter>
                                                <groupId>
                                                    org.codehaus.mojo
                                                </groupId>
                                                <artifactId>
                                                    build-helper-maven-plugin
                                                </artifactId>
                                                <versionRange>
                                                    [1.9.1,)
                                                </versionRange>
                                                <goals>
                                                    <goal>add-source</goal>
                                                </goals>
                                            </pluginExecutionFilter>
                                            <action>
                                                <execute>
                                                    <runOnConfiguration>true</runOnConfiguration>
                                                    <runOnIncremental>true</runOnIncremental>
                                                </execute>
                                            </action>
                                        </pluginExecution>
                                    </pluginExecutions>
                                </lifecycleMappingMetadata>
                            </configuration>
                        </plugin>
                    </plugins>
                </pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.codehaus.mojo</groupId>
                        <artifactId>build-helper-maven-plugin</artifactId>
                        <version>1.9.1</version>
                        <executions>
                            <execution>
                                <id>add-source</id>
                                <phase>generate-sources</phase>
                                <goals>
                                    <goal>add-source</goal>
                                </goals>
                                <configuration>
                                    <sources>
                                        <source>${project.build.directory}/generated-sources/annotations/</source>
                                    </sources>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

4.0.0
com.github.stefanheimberg
jpa21 maven metagen
1.0-快照
罐子
UTF-8
1.8
1.8
爪哇
JavaEEAPI
7
假如
冬眠
真的
5.0.3.4最终版本
org.hibernate
冬眠
${hibernate.version}
假如
日食
假的
2.6.1
org.eclipse.persistence
org.eclipse.persistence.jpa.modelgen.processor
${eclipselink.version}
假如
m2e
m2e.version
org.eclipse.m2e
生命周期映射
1.0.0
org.codehaus.mojo
构建助手maven插件
[1.9.1,)
添加源
真的
真的
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /your/not/CompilableClass:[5,68] cannot find symbol
  symbol:   class YouEntity_
  location: package your.not
[INFO] 1 error

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>${lombok.version}</version>
                        </path>
                        <path>
                            <groupId>org.hibernate</groupId>
                            <artifactId>hibernate-jpamodelgen</artifactId>
                            <version>${hibernate-jpamodelgen.version}</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>