“重复类”使用maven的代码生成（GWTP） [英] "duplicate class" on boilerplate generation (GWTP) with maven

问题描述

使用GWTP的样板机制后，我收到了类（其中生成的哪些）已经存在的错误。目标/生成源文件夹包含注释和apt，但没有gwt。两个文件夹注释和apt都有相同的内容。

我的pom.xml：

 <？xml version =1.0encoding =UTF-8？> 
< project xmlns =http://maven.apache.org/POM/4.0.0xmlns：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> de.s.pp< / groupId> 
< artifactId> projectplanning< / artifactId> 
< version> 1.0-SNAPSHOT< / version> 
< packaging> war< / packaging> 
< name> Projekt Planung< / name> 
< description>基本GWTP应用< / description> 
 
< properties> 
<！ -  client  - > 
< gwt.version> 2.7.0< / gwt.version> 
< gwtp.version> 1.4< / gwtp.version> 
< gin.version> 2.1.2< /gin.version> 
 
<！ - 服务器 - > 
< guice.version> 3.0< /guice.version> 
 
<！ - 测试 - > 
< junit.version> 4.11< / junit.version> 
< jukito.version> 1.1< / jukito.version> 
 
<！ -  maven  - > 
< gwt-maven-plugin.version> 2.7.0< / gwt-maven-plugin.version> 
< maven-surefire-plugin.version> 2.18.1< /maven-surefire-plugin.version> 
< maven-compiler-plugin.version> 3.2< /maven-compiler-plugin.version> 
< maven-resources-plugin.version> 2.7< /maven-resources-plugin.version> 
< maven-processor-plugin.version> 2.0.5< /maven-processor-plugin.version> 
< maven-build-helper-plugin.version> 1.7< /maven-build-helper-plugin.version> 
 
< source.jdk> 1.6< /source.jdk> 
< target.jdk> 1.6< /target.jdk> 
< project.build.sourceEncoding> UTF-8< /project.build.sourceEncoding> 
< project.reporting.outputEncoding> UTF-8< /project.reporting.outputEncoding> 
 
< webappDirectory> $ {project.build.directory} / $ {project.build.finalName}< / webappDirectory> 
< / properties> 
 
< build> 
< outputDirectory> $ {webappDirectory} / WEB-INF / classes< / outputDirectory> 
 
< resources> 
< resource> 
< directory> src / main / resources< / directory> 
< / resource> 
< resource> 
< directory> $ {project.build.directory} / generated-sources / apt< / directory> 
< / resource> 
< resource> 
< directory> $ {project.build.directory} / generated-sources / gwt< / directory> 
< / resource> 
< / resources> 
 
< plugins> 
 
<！ - 在src / home / java源上运行注释处理器 - > 
< plugin> 
< groupId> org.bsc.maven< / groupId> 
< artifactId> maven-processor-plugin< / artifactId> 
< version> 2.2.4< / version> 
<执行> 
< execution> 
< id>进程< / id> 
< goals> 
< goal>进程< / goal> 
< / goals> 
< phase> generate-sources< / phase> 
< / execution> 
< / executions> 
<依赖关系> 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-processors< / artifactId> 
< version> $ {gwtp.version}< / version> 
< / dependency> 
< / dependencies> 
< / plugin> 
 
<！ - 复制生成的类 - > 
< plugin> 
< groupId> org.codehaus.mojo< / groupId> 
< artifactId> build-helper-maven-plugin< / artifactId> 
< version> 1.5< / version> 
<执行> 
< execution> 
< id> add-source< / id> 
< phase> generate-sources< / phase> 
< goals> 
< goal> add-source< / goal> 
< / goals> 
< configuration> 
< sources> 
< source> $ {project.build.directory} / generated-sources / apt< / source> 
< source> $ {project.build.directory} / generated-sources / gwt< / source> 
< / sources> 
< / configuration> 
< / execution> 
< / executions> 
< / plugin> 
 
 
 
< plugin> 
< groupId> org.apache.maven.plugins< / groupId> 
< artifactId> maven-compiler-plugin< / artifactId> 
< version> $ {maven-compiler-plugin.version}< / version> 
< configuration> 
< source> $ {source.jdk}< / source> 
< target> $ {target.jdk}< / target> 
< encoding> $ {project.build.sourceEncoding}< / encoding> 
< / configuration> 
< / plugin> 
 
< plugin> 
< groupId> org.apache.tomcat.maven< / groupId> 
< artifactId> tomcat7-maven-plugin< / artifactId> 
< version> 2.1< / version> 
 
< / plugin> 
<！ -  JUnit测试 - 跳过* .GwtTest个案 - > 
<！ - 'mvn test' - 运行Jukito测试 - > 
< plugin> 
< groupId> org.apache.maven.plugins< / groupId> 
< artifactId> maven-surefire-plugin< / artifactId> 
< version> $ {maven-surefire-plugin.version}< / version> 
< configuration> 
< includes> 
< include> ** / * Test.java< / include> 
< / includes> 
< excludes> 
< exclude> ** / * GwtTest.java< / exclude> 
< / excludes> 
< / configuration> 
< / plugin> 
 
<！ -  GWT  - > 
<！ - 'mvn gwt：run' - 运行开发模式 - > 
<！ - 'mvn gwt：debug' - 运行调试模式 - > 
<！ - 'mvn gwt：compile' - 编译gwt  - > 
<！ - 'mvn integration-test' - 运行gwt测试（* GwtTest.java） - > 
< plugin> 
< groupId> org.codehaus.mojo< / groupId> 
< artifactId> gwt-maven-plugin< / artifactId> 
< version> $ {gwt.version}< / version> 
< configuration> 
<！ - 通过多次测试，使用GwtTestSuite.java进行速度 - > 
< includes> ** / * GwtTest.java< / includes> 
< extraJvmArgs> -Xss1024K -Xmx1024M -XX：MaxPermSize = 256M< / extraJvmArgs> 
 
< copyWebapp> true< / copyWebapp> 
< hostedWebapp> $ {webappDirectory}< / hostedWebapp> 
 
<！ - < logLevel> DEBUG< / logLevel> - > 
< runTarget> index.html< / runTarget> 
< modules> 
< module> de.s.pp.projectplanning< / module> 
< / modules> 
< / configuration> 
<执行> 
< execution> 
< id> compileAndTest< / id> 
< goals> 
< goal> compile< / goal> 
< goal> test< / goal> 
< / goals> 
< / execution> 
< execution> 
< id> packageGeneration< / id> 
< phase> prepare-package< / phase> 
< goals> 
< goal> compile< / goal> 
< / goals> 
< / execution> 
< / executions> 
< / plugin> 
< plugin> 
< groupId> org.datanucleus< / groupId> 
< artifactId> datanucleus-maven-plugin< / artifactId> 
< version> 3.2.0-release< / version> 
< configuration> 
< fork> false< / fork> 
< api> JDO< / api> 
<！ - < ddlFile> $ {basedir} /servicecenter.ddl</ddlFile> - > 
< props> $ {basedir} /datanucleus.properties</props> 
< log4jConfiguration> $ {basedir} /log4j.properties</log4jConfiguration> 
< verbose> true< / verbose> 
< / configuration> 
<执行> 
< execution> 
< phase> process-classes< / phase> 
< goals> 
< goal>增强< / goal> 
< / goals> 
< / execution> 
< / executions> 
< / plugin> 
< / plugins> 
< pluginManagement> 
< plugins> 
<！ - 此插件的配置用于仅存储Eclipse m2e设置
。它对Maven构建本身没有影响。 - > 
< plugin> 
< groupId> org.eclipse.m2e< / groupId> 
< artifactId>生命周期映射< / artifactId> 
< version> 1.0.0< / version> 
< configuration> 
< lifecycleMappingMetadata> 
< pluginExecutions> 
< pluginExecution> 
< pluginExecutionFilter> 
< groupId> 
 org.datanucleus 
< / groupId> 
< artifactId> 
 datanucleus-maven-plugin 
< / artifactId> 
< versionRange> 
 [3.2.0-release] 
< / versionRange> 
< goals> 
< goal>增强< / goal> 
< / goals> 
< / pluginExecutionFilter> 
< action> 
< ignore>< / ignore> 
< / action> 
< / pluginExecution> 
< pluginExecution> 
< pluginExecutionFilter> 
< groupId> org.bsc.maven< / groupId> 
< artifactId> 
 maven-processor-plugin 
< / artifactId> 
< versionRange> 
 [2.2.4，] 
< / versionRange> 
< goals> 
< goal>进程< / goal> 
< / goals> 
< / pluginExecutionFilter> 
< action> 
< ignore>< / ignore> 
< / action> 
< / pluginExecution> 
 
< pluginExecution> 
< pluginExecutionFilter> 
< groupId> org.bsc.maven< / groupId> 
< artifactId> maven-processor-plugin< / artifactId> 
< versionRange> [2.2.4，）< / versionRange> 
< goals> 
 
< goal> generate-sources< / goal> 
< / goals> 
< / pluginExecutionFilter> 
< action> 
< execute /> 
< / action> 
< / pluginExecution> 
 
 
 
 
 
< pluginExecution> 
< pluginExecutionFilter> 
< groupId> 
 org.codehaus.mojo 
< / groupId> 
< artifactId> 
 build-helper-maven-plugin 
< / artifactId> 
< versionRange> 
 [1.5，）
< / versionRange> 
< goals> 
< goal> add-source< / goal> 
< / goals> 
< / pluginExecutionFilter> 
< action> 
< ignore>< / ignore> 
< / action> 
< / pluginExecution> 
< / pluginExecutions> 
< / lifecycleMappingMetadata> 
< / configuration> 
< / plugin> 
< / plugins> 
< / pluginManagement> 
< / build> 
 
<依赖关系> 
<！ -  Google Web Toolkit  - > 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-user< / artifactId> 
< version> $ {gwt.version}< / version> 
< scope>已提供< / scope> 
< / dependency> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-servlet< / artifactId> 
< version> $ {gwt.version}< / version> 
< scope>运行时< / scope> 
< / dependency> 
 
<！ -  GWT-Platform  - > 
 
<！ -  MVP组件 - > 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-mvp-client< / artifactId> 
< version> $ {gwtp.version}< / version> 
< scope>已提供< / scope> 
< / dependency> 
 
<！ - 调度组件 - > 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-dispatch-rpc-client< / artifactId> 
< version> $ {gwtp.version}< / version> 
< scope>已提供< / scope> 
< / dependency> 
 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-dispatch-rpc-server-guice< / artifactId> 
<！ - 或者，如果您使用spring：< artifactId> gwtp-dispatch-server-spring< / artifactId> - > 
< version> $ {gwtp.version}< / version> 
< / dependency> 
 
<！ - 抓取器组件 - > 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-crawler< / artifactId> 
< version> $ {gwtp.version}< / version> 
< / dependency> 
 
<！ - 注释组件 - > 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-processors< / artifactId> 
< version> $ {gwtp.version}< / version> 
< scope>已提供< / scope> 
< / dependency> 
 
<！ - 测试器组件 - > 
<依赖关系> 
< groupId> com.gwtplatform< / groupId> 
< artifactId> gwtp-tester< / artifactId> 
< version> $ {gwtp.version}< / version> 
< scope> test< / scope> 
< / dependency> 
 
<！ -  DI  - > 
<依赖关系> 
< groupId> com.google.inject< / groupId> 
< artifactId> guice< / artifactId> 
< version> $ {guice.version}< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.inject.extensions< / groupId> 
< artifactId> guice-servlet< / artifactId> 
< version> $ {guice.version}< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.inject.extensions< / groupId> 
< artifactId> guice-assistedinject< / artifactId> 
< version> $ {guice.version}< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.gwt.inject< / groupId> 
< artifactId> gin< / artifactId> 
< version> $ {gin.version}< / version> 
< / dependency> 
 
<！ - 测试 - > 
<依赖关系> 
< groupId> junit< / groupId> 
< artifactId> junit< / artifactId> 
< version> $ {junit.version}< / version> 
< scope> test< / scope> 
< / dependency> 
<依赖关系> 
< groupId> org.jukito< / groupId> 
< artifactId> jukito< / artifactId> 
< version> $ {jukito.version}< / version> 
< scope> test< / scope> 
< / dependency> 
 
<！ - 番石榴 - > 
<依赖关系> 
< groupId> com.google.guava< / groupId> 
< artifactId> guava< / artifactId> 
< version> 16.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.guava< / groupId> 
< artifactId> guava-gwt< / artifactId> 
< version> 16.0< / version> 
< / dependency> 
 
<！ - 数据库 - > 
<依赖关系> 
< groupId> org.datanucleus< / groupId> 
< artifactId> datanucleus-core< / artifactId> 
< version> [3.2.0，3.2.99）< / version> 
< scope>运行时< / scope> 
< / dependency> 
<依赖关系> 
< groupId> javax.jdo< / groupId> 
< artifactId> jdo-api< / artifactId> 
< version> 3.0.1< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.datanucleus< / groupId> 
< artifactId> datanucleus-api-jdo< / artifactId> 
< version> [3.2.0，3.2.99）< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.datanucleus< / groupId> 
< artifactId> datanucleus-rdbms< / artifactId> 
< version> [3.2.0，3.2.99）< / version> 
< scope>运行时< / scope> 
< / dependency> 
<依赖关系> 
< groupId> org.hsqldb< / groupId> 
< artifactId> hsqldb< / artifactId> 
< version> 2.2.9< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.mindrot< / groupId> 
< artifactId> jbcrypt< / artifactId> 
< version> 0.3m< / version> 
< / dependency> 
 
<依赖关系> 
< groupId> javax.servlet< / groupId> 
< artifactId> javax.servlet-api< / artifactId> 
< version> 3.1.0< / version> 
< scope>已提供< / scope> 
< / dependency> 
<依赖关系> 
< groupId> org.apache.poi< / groupId> 
< artifactId> poi< / artifactId> 
< version> 3.11< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.apache.shiro< / groupId> 
< artifactId> shiro-core< / artifactId> 
< version> 1.2.2< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.apache.shiro< / groupId> 
< artifactId> shiro-guice< / artifactId> 
< version> 1.2.2< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.apache.shiro< / groupId> 
< artifactId> shiro-web< / artifactId> 
< version> 1.2.2< / version> 
< / dependency> 
<依赖关系> 
< groupId> org.apache.poi< / groupId> 
< artifactId> poi-ooxml< / artifactId> 
< version> 3.10-beta1< / version> 
< / dependency> 
< / dependencies> 
 
< repositories> 
< repository> 
< id> maven-restlet< / id> 
< name>公共在线Restlet存储库< / name> 
< url> http：//maven.restlet.org< / url> 
< / repository> 
< repository> 
< id> mvnrepository< / id> 
< name>公共在线Restlet存储库< / name> 
< url> http：//mvnrepository.com/artifact< / url> 
< / repository> 
< / repositories> 
< / project> 
  

输出：

  [INFO]扫描项目... 
 [INFO] 
 [INFO]使用构建器org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder与线程计数1 
 [INFO] 
 [INFO] --------------------------------- --------------------------------------- 
 [INFO] Building Projekt Planung 1.0 -SNAPSHOT 
 [INFO] ----------------------------------------- ------------------------------- 
 [INFO] 
 [INFO]>>> ; gwt-maven-plugin：2.7.0：run（default-cli）@ projectplanning>>> 
 [INFO] 
 [INFO] --- maven-processor-plugin：2.2.4：process（process）@ projectplanning --- 
 [WARNING]没有指定处理器。使用默认发现机制。 
 [INFO] 
 [INFO] --- build-helper-maven-plugin：1.5：add-source（add-source）@ projectplanning --- 
 [INFO]源目录： C：\Workspaces\s\projectplanning\target\generated-sources\apt已添加。 
 [INFO]源目录：C：\Workspaces\s\projectplanning\target\generated-sources\gwt添加。 
 [INFO] 
 [INFO] --- maven-resources-plugin：2.6：resources（default-resources）@ projectplanning --- 
 [INFO]使用'UTF-8'复制过滤的资源。 
 [INFO]复制57资源
 [INFO]复制2资源
 [INFO]跳过不存在的resourceDirectory C：\Workspaces\s\projectplanning\target\generated-sources \gwt 
 [INFO] 
 [INFO] --- maven-compiler-plugin：3.2：compile（default-compile）@ projectplanning --- 
 [INFO]检测到更改 - 重新编译模块！ 
 [INFO]将187个源文件编译到C：\Workspaces\s\projectplanning\target\projectplanning-1.0-SNAPSHOT\WEB-INF\classes 
 [INFO] / C ：/Workspaces/s/projectplanning/src/main/java/de/s/pp/server/security/UserPermissionActionValidator.java：C：\Workspaces\s\projectplanning\src\main\java\ de\s\pp\server\security\UserPermissionActionValidator.java使用未选中或不安全的操作。 
 [INFO] /C:/Workspaces/s/projectplanning/src/main/java/de/s/pp/server/security/UserPermissionActionValidator.java：使用-Xlint重新编译：取消选中详细信息。 
 [INFO] ------------------------------------------- ------------------ 
 [错误]编译错误：
 [INFO] --------------- ---------------------------------------------- 
 [ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/apt/de/s/pp/shared/dispatch/actionresult/GetAllClustersResult.java:[7,8]重复类：de.s.pp .shared.dispatch.actionresult.GetAllClustersResult 
 [ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/annotations/de/s/pp/shared/dispatch/actionresult/GetAllClustersAction.java：[ 5,8]重复类：de.s.pp.shared.dispatch.actionresult.GetAllClustersAction 
 [INFO] 2个错误
 [INFO] -------------- ----------------------------------------------- 
 [INFO] ---------------------------------------------- -------------------------- 
 [INFO] BUILD FAILURE 
 [INFO] -------- -------------------------------------------------- -------------- 
 [INFO]总时间：6.458 s 
 [INFO]完成于：2015-01-20T18：11：43 + 01： 00 
 [INFO] Final Memory：30M / 277M 
 [INFO] ----------------------------- ------------------------------------------- 
 [错误]无法执行目标org.apache.maven.plugins：maven-compiler-plugin：3.2：在项目项目计划中编译（default-compile）：编译失败：编译失败：
 [ERROR] / C：/ Workspaces / s /projectplanning/target/generated-sources/apt/de/s/pp/shared/dispatch/actionresult/GetAllClustersResult.java:[7,8]重复类：de.s.pp.shared.dispatch.actionresult.GetAllClustersResult 
 [ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/annotations/de/s/pp/shared/dispatch/actionresult/GetAllClustersAction.java:[5,8]重复类：de.s .pp.shared.dispatch.actionresult.GetAllClustersAction 
 [ERROR]  - > [帮助1] 
 [ERROR] 
 [ERROR]要查看错误的完整堆栈跟踪，请使用-e开关重新运行Maven。 
 [ERROR]使用-X开关重新运行Maven以启用完整的调试日志记录。 
 [ERROR] 
 [ERROR]有关错误和可能的解决方案的更多信息，请阅读以下文章：
 [错误] [帮助1] http://cwiki.apache.org / confluence / display / MAVEN / MojoFailureException 
  

解决方案

问题是maven-processor-plugin和maven-compiler-plugin在其中生成（相同）源到不同的文件夹。解决方案是禁用一个处理器。我决定禁用maven-processor-plugin。

另一个选项是添加< compilerArgument> -proc：none< / compilerArgument> 到maven-compiler-plugin。这有利于 mvn生成源正在工作。

After using the boilerplate mechanisms of GWTP I get the error that the classes (which where generated) are already existing.

The folder target/generated-sources contains "annotations" and "apt" but no "gwt". Both folders "annotations" and "apt" have the same content.

my 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>de.s.pp</groupId>
    <artifactId>projectplanning</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>Projekt Planung</name>
    <description>Basic GWTP application</description>

    <properties>
        <!-- client -->
        <gwt.version>2.7.0</gwt.version>
        <gwtp.version>1.4</gwtp.version>
        <gin.version>2.1.2</gin.version>

        <!-- server -->
        <guice.version>3.0</guice.version>

        <!-- testing -->
        <junit.version>4.11</junit.version>
        <jukito.version>1.1</jukito.version>

        <!-- maven -->
        <gwt-maven-plugin.version>2.7.0</gwt-maven-plugin.version>
        <maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
        <maven-compiler-plugin.version>3.2</maven-compiler-plugin.version>
        <maven-resources-plugin.version>2.7</maven-resources-plugin.version>
        <maven-processor-plugin.version>2.0.5</maven-processor-plugin.version>
        <maven-build-helper-plugin.version>1.7</maven-build-helper-plugin.version>

        <source.jdk>1.6</source.jdk>
        <target.jdk>1.6</target.jdk>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
    </properties>

    <build>
        <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>

        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>${project.build.directory}/generated-sources/apt</directory>
            </resource>
            <resource>
                <directory>${project.build.directory}/generated-sources/gwt</directory>
            </resource>
        </resources>

        <plugins>

            <!-- Run annotation processors on src/home/java sources -->
            <plugin>
                <groupId>org.bsc.maven</groupId>
                <artifactId>maven-processor-plugin</artifactId>
                <version>2.2.4</version>
                <executions>
                    <execution>
                        <id>process</id>
                        <goals>
                            <goal>process</goal>
                        </goals>
                        <phase>generate-sources</phase>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>com.gwtplatform</groupId>
                        <artifactId>gwtp-processors</artifactId>
                        <version>${gwtp.version}</version>
                    </dependency>
                </dependencies>
            </plugin>

            <!-- Copy the generated classses -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>build-helper-maven-plugin</artifactId>
                <version>1.5</version>
                <executions>
                    <execution>
                        <id>add-source</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                        <configuration>
                            <sources>
                                <source>${project.build.directory}/generated-sources/apt</source>
                                <source>${project.build.directory}/generated-sources/gwt</source>
                            </sources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>



            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven-compiler-plugin.version}</version>
                <configuration>
                    <source>${source.jdk}</source>
                    <target>${target.jdk}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.1</version>

            </plugin>
            <!-- JUnit Testing - skip *.GwtTest cases -->
            <!-- 'mvn test' - runs the Jukito tests -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>${maven-surefire-plugin.version}</version>
                <configuration>
                    <includes>
                        <include>**/*Test.java</include>
                    </includes>
                    <excludes>
                        <exclude>**/*GwtTest.java</exclude>
                    </excludes>
                </configuration>
            </plugin>

            <!-- GWT -->
            <!-- 'mvn gwt:run' - runs development mode -->
            <!-- 'mvn gwt:debug' - runs debug mode -->
            <!-- 'mvn gwt:compile' - compiles gwt -->
            <!-- 'mvn integration-test' - runs the gwt tests (*GwtTest.java) -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>gwt-maven-plugin</artifactId>
                <version>${gwt.version}</version>
                <configuration>
                    <!-- With multiple tests use GwtTestSuite.java for speed -->
                    <includes>**/*GwtTest.java</includes>
                    <extraJvmArgs>-Xss1024K -Xmx1024M -XX:MaxPermSize=256M</extraJvmArgs>

                    <copyWebapp>true</copyWebapp>
                    <hostedWebapp>${webappDirectory}</hostedWebapp>

                    <!-- <logLevel>DEBUG</logLevel> -->
                    <runTarget>index.html</runTarget>
                    <modules>
                        <module>de.s.pp.projectplanning</module>
                    </modules>
                </configuration>
                <executions>
                    <execution>
                        <id>compileAndTest</id>
                        <goals>
                            <goal>compile</goal>
                            <goal>test</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>packageGeneration</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.datanucleus</groupId>
                <artifactId>datanucleus-maven-plugin</artifactId>
                <version>3.2.0-release</version>
                <configuration>
                    <fork>false</fork>
                    <api>JDO</api>
                    <!-- <ddlFile>${basedir}/servicecenter.ddl</ddlFile> -->
                    <props>${basedir}/datanucleus.properties</props>
                    <log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
                    <verbose>true</verbose>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>enhance</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <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.datanucleus
                                        </groupId>
                                        <artifactId>
                                            datanucleus-maven-plugin
                                        </artifactId>
                                        <versionRange>
                                            [3.2.0-release]
                                        </versionRange>
                                        <goals>
                                            <goal>enhance</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore></ignore>
                                    </action>
                                </pluginExecution>
                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>org.bsc.maven</groupId>
                                        <artifactId>
                                            maven-processor-plugin
                                        </artifactId>
                                        <versionRange>
                                            [2.2.4,)
                                        </versionRange>
                                        <goals>
                                            <goal>process</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore></ignore>
                                    </action>
                                </pluginExecution>

                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>org.bsc.maven</groupId>
                                        <artifactId>maven-processor-plugin</artifactId>
                                        <versionRange>[2.2.4,)</versionRange>
                                        <goals>

                                            <goal>generate-sources</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <execute />
                                    </action>
                                </pluginExecution>





                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>
                                            org.codehaus.mojo
                                        </groupId>
                                        <artifactId>
                                            build-helper-maven-plugin
                                        </artifactId>
                                        <versionRange>
                                            [1.5,)
                                        </versionRange>
                                        <goals>
                                            <goal>add-source</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore></ignore>
                                    </action>
                                </pluginExecution>
                            </pluginExecutions>
                        </lifecycleMappingMetadata>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

    <dependencies>
        <!-- Google Web Toolkit -->
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-user</artifactId>
            <version>${gwt.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-servlet</artifactId>
            <version>${gwt.version}</version>
            <scope>runtime</scope>
        </dependency>

        <!-- GWT-Platform -->

        <!-- MVP component -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-mvp-client</artifactId>
            <version>${gwtp.version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- Dispatch component -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-dispatch-rpc-client</artifactId>
            <version>${gwtp.version}</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-dispatch-rpc-server-guice</artifactId>
            <!-- Or, if you use spring: <artifactId>gwtp-dispatch-server-spring</artifactId> -->
            <version>${gwtp.version}</version>
        </dependency>

        <!-- Crawler component -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-crawler</artifactId>
            <version>${gwtp.version}</version>
        </dependency>

        <!-- Annotation component -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-processors</artifactId>
            <version>${gwtp.version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- Tester component -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-tester</artifactId>
            <version>${gwtp.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- DI -->
        <dependency>
            <groupId>com.google.inject</groupId>
            <artifactId>guice</artifactId>
            <version>${guice.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.inject.extensions</groupId>
            <artifactId>guice-servlet</artifactId>
            <version>${guice.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.inject.extensions</groupId>
            <artifactId>guice-assistedinject</artifactId>
            <version>${guice.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.gwt.inject</groupId>
            <artifactId>gin</artifactId>
            <version>${gin.version}</version>
        </dependency>

        <!-- Test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.jukito</groupId>
            <artifactId>jukito</artifactId>
            <version>${jukito.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- Guava -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>16.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava-gwt</artifactId>
            <version>16.0</version>
        </dependency>

        <!-- Database -->
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <version>[3.2.0, 3.2.99)</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>javax.jdo</groupId>
            <artifactId>jdo-api</artifactId>
            <version>3.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jdo</artifactId>
            <version>[3.2.0, 3.2.99)</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-rdbms</artifactId>
            <version>[3.2.0, 3.2.99)</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.hsqldb</groupId>
            <artifactId>hsqldb</artifactId>
            <version>2.2.9</version>
        </dependency>
        <dependency>
            <groupId>org.mindrot</groupId>
            <artifactId>jbcrypt</artifactId>
            <version>0.3m</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.11</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-guice</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-web</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.10-beta1</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>maven-restlet</id>
            <name>Public online Restlet repository</name>
            <url>http://maven.restlet.org</url>
        </repository>
        <repository>
            <id>mvnrepository</id>
            <name>Public online Restlet repository</name>
            <url>http://mvnrepository.com/artifact</url>
        </repository>
    </repositories>
</project>

The output:

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Projekt Planung 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] >>> gwt-maven-plugin:2.7.0:run (default-cli) @ projectplanning >>>
[INFO] 
[INFO] --- maven-processor-plugin:2.2.4:process (process) @ projectplanning ---
[WARNING] No processors specified. Using default discovery mechanism.
[INFO] 
[INFO] --- build-helper-maven-plugin:1.5:add-source (add-source) @ projectplanning ---
[INFO] Source directory: C:\Workspaces\s\projectplanning\target\generated-sources\apt added.
[INFO] Source directory: C:\Workspaces\s\projectplanning\target\generated-sources\gwt added.
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ projectplanning ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 57 resources
[INFO] Copying 2 resources
[INFO] skip non existing resourceDirectory C:\Workspaces\s\projectplanning\target\generated-sources\gwt
[INFO] 
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ projectplanning ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 187 source files to C:\Workspaces\s\projectplanning\target\projectplanning-1.0-SNAPSHOT\WEB-INF\classes
[INFO] /C:/Workspaces/s/projectplanning/src/main/java/de/s/pp/server/security/UserPermissionActionValidator.java: C:\Workspaces\s\projectplanning\src\main\java\de\s\pp\server\security\UserPermissionActionValidator.java uses unchecked or unsafe operations.
[INFO] /C:/Workspaces/s/projectplanning/src/main/java/de/s/pp/server/security/UserPermissionActionValidator.java: Recompile with -Xlint:unchecked for details.
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/apt/de/s/pp/shared/dispatch/actionresult/GetAllClustersResult.java:[7,8] duplicate class: de.s.pp.shared.dispatch.actionresult.GetAllClustersResult
[ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/annotations/de/s/pp/shared/dispatch/actionresult/GetAllClustersAction.java:[5,8] duplicate class: de.s.pp.shared.dispatch.actionresult.GetAllClustersAction
[INFO] 2 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.458 s
[INFO] Finished at: 2015-01-20T18:11:43+01:00
[INFO] Final Memory: 30M/277M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project projectplanning: Compilation failure: Compilation failure:
[ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/apt/de/s/pp/shared/dispatch/actionresult/GetAllClustersResult.java:[7,8] duplicate class: de.s.pp.shared.dispatch.actionresult.GetAllClustersResult
[ERROR] /C:/Workspaces/s/projectplanning/target/generated-sources/annotations/de/s/pp/shared/dispatch/actionresult/GetAllClustersAction.java:[5,8] duplicate class: de.s.pp.shared.dispatch.actionresult.GetAllClustersAction
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

解决方案

The problem was that the maven-processor-plugin and the maven-compiler-plugin where generating the (same) sources to different folders. The solution is to disable one processor. I decided that the maven-processor-plugin will be disabled.

The other option is to add <compilerArgument>-proc:none</compilerArgument> to the maven-compiler-plugin. This has the benifit that mvn generate-sources is working.

这篇关于“重复类”使用maven的代码生成（GWTP）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！