Maven eclipselink元模型不'；清洁后产生的热量

我的项目配置为使用Eclipselink，构建工具是Maven。我需要在代码中使用JPA2元模型，因此我的

pom.xml

包含相关配置：

        <plugin>
            <groupId>org.bsc.maven</groupId>
            <artifactId>maven-processor-plugin</artifactId>
            <version>2.0.4</version>
            <executions>
                <execution>
                    <id>process</id>
                    <goals>
                        <goal>process</goal>
                    </goals>
                    <phase>generate-sources</phase>
                    <configuration>
                        <outputDirectory>${project.build.directory}/generated-sources/metamodel</outputDirectory>
                        <compilerArguments>
                            -Aeclipselink.persistencexml=${project.basedir}/src/main/resources/META-INF/business/user/persistence.xml
                        </compilerArguments>
                        <processors>
                            <processor>org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor
                            </processor>
                        </processors>
                    </configuration>
                </execution>
            </executions>
        </plugin>

只有再次执行

mvn compile

后，我才成功编译

[INFO] --- maven-processor-plugin:2.0.4:process (process) @ fsdp-user-service-datalayer ---
[INFO] Source directory: <path>\UserService\DataLayer\target\generated-sources\metamodel added
[INFO] Adding compiler arg: -Aeclipselink.persistencexml=<path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] javac option: -cp
[INFO] javac option: <jars>
[INFO] javac option: -proc:only
[INFO] javac option: -Aeclipselink.persistencexml=<path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] javac option: -processor
[INFO] javac option: org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor
[INFO] javac option: -d
[INFO] javac option: <path>\UserService\DataLayer\target\classes
[INFO] javac option: -s
[INFO] javac option: <path>\UserService\DataLayer\target\generated-sources\metamodel
[INFO] diagnostic <path>\UserService\DataLayer\src\main\java\user\dao\impl\UserDAOImpl.java:11: cannot find symbol
symbol  : class UserEntity_
location: package user.entity
[INFO] diagnostic Note: Creating static metadata factory ...
[INFO] diagnostic Note: Found Option : eclipselink.persistencexml, with value: <path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] diagnostic Note: Optional file was not found: META-INF/orm.xml continuing with generation.
[INFO] diagnostic Note: Optional file was not found: META-INF/eclipselink-orm.xml continuing with generation.
[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false
[INFO] diagnostic Note: Found Option : eclipselink.persistencexml, with value: <path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] diagnostic Note: Optional file was not found: META-INF/orm.xml continuing with generation.
[INFO] diagnostic Note: Optional file was not found: META-INF/eclipselink-orm.xml continuing with generation.
[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false
[INFO] diagnostic warning: The following options were not recognized by any processor: '[eclipselink.persistencexml]'
[INFO] 
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ fsdp-user-service-datalayer ---
[debug] execute contextualize
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 3 resources
[INFO] 
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ fsdp-user-service-datalayer ---
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 12 source files to <path>\UserService\DataLayer\target\classes
[INFO] 
[INFO] --- aspectj-maven-plugin:1.4:compile (compile) @ fsdp-user-service-datalayer ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.720s
[INFO] Finished at: Thu Aug 02 17:45:18 MSK 2012
[INFO] Final Memory: 26M/62M
[INFO] ------------------------------------------------------------------------

[INFO]——maven处理器插件：2.0.4:process（process）@fsdp用户服务数据层---
[INFO]源目录：\UserService\DataLayer\target\generated sources\metamodel已添加
[INFO]添加编译器参数：-Aeclipselink.persistencexml=\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO]javac选项：-cp
[INFO]javac选项：
[INFO]javac选项：-proc:仅限
[INFO]javac选项：-Aeclipselink.persistencexml=\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO]javac选项：-处理器
[INFO]javac选项：org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor
[INFO]javac选项：-d
[INFO]javac选项：\UserService\DataLayer\target\classes
[INFO]javac选项：-s
[INFO]javac选项：\UserService\DataLayer\target\generated sources\metamodel
[INFO]diagnostic\UserService\DataLayer\src\main\java\user\dao\impl\UserDAOImpl.java:11:找不到符号
符号：类用户实体_
位置：包user.entity
[信息]诊断说明：正在创建静态元数据工厂。。。
[信息]诊断说明：找到选项：eclipselink.persistencexml，值为：\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[信息]诊断说明：未找到可选文件：META-INF/orm.xml正在继续生成。
[信息]诊断说明：未找到可选文件：META-INF/eclipselink-orm.xml继续生成。
[信息]诊断说明：加载的文件：META-INF/business/user/orm.xml，是eclipselink orm文件：false
[信息]诊断说明：找到选项：eclipselink.persistencexml，值为：\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[信息]诊断说明：未找到可选文件：META-INF/orm.xml正在继续生成。
[信息]诊断说明：未找到可选文件：META-INF/eclipselink-orm.xml继续生成。
[信息]诊断说明：加载的文件：META-INF/business/user/orm.xml，是eclipselink orm文件：false
[信息]诊断警告：任何处理器都无法识别以下选项：“[eclipselink.persistencexml]”
[信息]
[信息]---maven资源插件：2.5:资源（默认资源）@fsdp用户服务数据层---
[调试]执行上下文化
[警告]使用平台编码（实际上是UTF-8）复制过滤后的资源，即构建依赖于平台！
[信息]正在复制3个资源
[信息]
[信息]---maven编译器插件：2.3.2:compile（默认编译）@fsdp用户服务数据层---
[警告]未使用平台编码UTF-8设置文件编码，即生成依赖于平台！
[INFO]正在将12个源文件编译为\UserService\DataLayer\target\classes
[信息]
[INFO]——aspectj maven插件：1.4:compile（compile）@fsdp用户服务数据层---
[信息]------------------------------------------------------------------------
[信息]建立成功
[信息]------------------------------------------------------------------------
[信息]总时间：4.720s
[信息]完成时间：2012年8月2日星期四17:45:18
[信息]最终内存：26M/62M
[信息]------------------------------------------------------------------------

两个日志之间的主要区别在于“Unsuccess clean compile”日志的以下几行内容：

[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false
[INFO] diagnostic Note: Found Option : eclipselink.persistencexml, with value: <path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] diagnostic Note: Optional file was not found: META-INF/orm.xml continuing with generation.
[INFO] diagnostic Note: Optional file was not found: META-INF/eclipselink-orm.xml continuing with generation.
[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false

[INFO]诊断说明：加载的文件：META-INF/business/user/orm.xml，是eclipselink orm文件：false
[信息]诊断说明：找到选项：eclipselink.persistencexml，值为：\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[信息]诊断说明：未找到可选文件：META-INF/orm.xml正在继续生成。
[信息]诊断说明：未找到可选文件：META-INF/eclipselink-orm.xml继续生成。
[信息]诊断说明：加载的文件：META-INF/business/user/orm.xml，是eclipselink orm文件：false

但是“成功编译”日志没有

---

所以问题是：为什么我会有如此奇怪的行为？

您能在不成功的运行之前找到user/orm.xml文件，然后在运行之后查找它吗？这个过程需要它来构建元模型，我猜只有在元模型创建过程之后，才会将它复制到需要它的地方。这可能就是为什么您会收到“未找到文件”消息，从而阻止创建UserEntity。第二步可以找到路径上的文件，从而创建编译UserDAOImpl类所需的UserEntity<应该在persistence.xml路径中使用code>{basedir}而不是

{project.basedir}

在运行失败之前找到user/orm.xml文件，然后在运行之后查找它吗？这个过程需要它来构建元模型，我猜只有在元模型创建过程之后，才会将它复制到需要它的地方。这可能就是为什么您会收到“未找到文件”消息，从而阻止创建UserEntity。第二步可以找到路径上的文件，从而创建编译UserDAOImpl类所需的UserEntity<应该在persistence.xml路径中使用code>{basedir}而不是

{project.basedir}

[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false
[INFO] diagnostic Note: Found Option : eclipselink.persistencexml, with value: <path>\UserService\DataLayer/src/main/resources/META-INF/business/user/persistence.xml
[INFO] diagnostic Note: Optional file was not found: META-INF/orm.xml continuing with generation.
[INFO] diagnostic Note: Optional file was not found: META-INF/eclipselink-orm.xml continuing with generation.
[INFO] diagnostic Note: File loaded : META-INF/business/user/orm.xml, is eclipselink-orm file: false