Jpa 2.0 未找到前缀-Maven的插件

我已经使用maven为JPA实体生成了元模型

但我得到了以下错误：

    [ERROR] No plugin found for prefix 'maven-compiler-plugin' in the current project
and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available
    from the repositories [local, central (http://repo.maven.apache.org/maven2)] -> [Help 1]
org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException: No plugin found
for prefix 'maven-compiler-plugin' in the current project and in the plugin groups 
    [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories
[local, central (http://repo.maven.apache.org/maven2)]
at org.apache.maven.plugin.prefix.internal.DefaultPluginPrefixResolver.resolve(DefaultPluginPrefixResolver.java:93)
at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.findPluginForPrefix(MojoDescriptorCreator.java:260)
at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.getMojoDescriptor(MojoDescriptorCreator.java:220)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:106)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:86)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:98)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

我的pom.xml是

<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/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>

<groupId>com.signalmapper</groupId>
<artifactId>SignalMapper</artifactId>

<properties>
    <appengine.target.version>1.9.15</appengine.target.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring.version>4.0.1.RELEASE</spring.version>
    <build.directory>./war/WEB-INF</build.directory>
    <datanucleus.version>3.1.3</datanucleus.version>
</properties>

<dependencies>
    <!-- Compile/runtime dependencies -->
    <!-- Spring dependencies -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
        <exclusions>
            <!-- Exclude Commons Logging in favor of SLF4j -->
            <exclusion>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <!-- App Engine dependencies -->
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-1.0-sdk</artifactId>
        <version>${appengine.target.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>

    <!-- Datanucleus persistence -->
    <dependency>
        <groupId>com.google.appengine.orm</groupId>
        <artifactId>datanucleus-appengine</artifactId>
        <version>2.0.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.datanucleus</groupId>
        <artifactId>datanucleus-core</artifactId>
        <version>${datanucleus.version}</version>
    </dependency>
    <dependency>
        <groupId>org.datanucleus</groupId>
        <artifactId>datanucleus-api-jpa</artifactId>
        <version>${datanucleus.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.geronimo.specs</groupId>
        <artifactId>geronimo-jpa_2.0_spec</artifactId>
        <version>1.0</version>
    </dependency>
    <dependency>
        <groupId>org.datanucleus</groupId>
        <artifactId>datanucleus-enhancer</artifactId>
        <version>3.1.1</version>
    </dependency>
    <dependency>
        <groupId>javax.persistence</groupId>
        <artifactId>persistence-api</artifactId>
        <version>1.0.2</version>
        <scope>provided</scope>
    </dependency>

    <!-- JSON-parser dependencies -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.2.3</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.2.3</version>
    </dependency>

    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>1.9.13</version>
    </dependency>

    <!-- Spring data JPA dependency -->
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
        <version>1.7.1.RELEASE</version>
    </dependency>

    <!-- slf4j dependency -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.7</version>
    </dependency>

    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>6.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

<build>
    <outputDirectory>${build.directory}/classes</outputDirectory>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <version>2.5.1</version>
            <artifactId>eccompiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <executions>
                <execution>
                    <id>default-war</id>
                    <phase>prepare-package</phase>
                    <configuration>
                        <failOnMissingWebXml>false</failOnMissingWebXml>
                        <archiveClasses>false</archiveClasses>
                        <archive>
                            <manifest>
                                <addClasspath>true</addClasspath>
                                <classpathPrefix />
                            </manifest>
                        </archive>
                    </configuration>
                </execution>
            </executions>
            <version>2.3</version>
            <configuration>
                <archiveClasses>true</archiveClasses>
            </configuration>
        </plugin>
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>${appengine.target.version}</version>
        </plugin>
        <plugin>
            <artifactId>maven-dependency-plugin</artifactId>
            <executions>
                <execution>
                    <phase>process-sources</phase>

                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>

                    <configuration>
                        <outputDirectory>${build.directory}/lib</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.datanucleus</groupId>
            <artifactId>maven-datanucleus-plugin</artifactId>
            <version>3.0.2</version>
            <configuration>
                <api>JPA</api>
                <metadataDirectory>${build.directory}/classes/com/signalmapper/data/model</metadataDirectory>
                <metadataIncludes>**/*.class</metadataIncludes>
                <persistenceUnitName>transactions-optional</persistenceUnitName>
                <verbose>true</verbose>
                <resources>
                    <resource>
                        <filtering>true</filtering>
                        <directory>src/resources/META-INF</directory>
                        <includes>
                            <include>persistence.xml</include>
                        </includes>
                    </resource>
                </resources>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>org.datanucleus</groupId>
                    <artifactId>datanucleus-core</artifactId>
                    <version>${datanucleus.version}</version>
                </dependency>
            </dependencies>
            <executions>
                <execution>
                    <phase>process-classes</phase>
                    <goals>
                        <goal>enhance</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <executions>
                <execution>
                    <id>generate-entity-metamodel</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                    <configuration>
                        <source>1.6</source>
                        <target>1.6</target>
                        <optimize>true</optimize>
                        <showDeprecation>true</showDeprecation>
                        <showWarnings>true</showWarnings>
                        <proc>only</proc>
                        <compilerArgument>-Aopenjpa.metamodel=true</compilerArgument>
                        <generatedSourcesDirectory>${build.directory}/generated-sources</generatedSourcesDirectory>
                        <compilerArguments>
                            <processor>org.apache.openjpa.persistence.meta.AnnotationProcessor6</processor>
                        </compilerArguments>
                    </configuration>
                </execution>
                <execution>
                    <id>compile</id>
                    <phase>compile</phase>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                    <configuration>
                        <source>1.6</source>
                        <target>1.6</target>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

4.0.0
战争
1.0-快照
com.signalmapper
信号映射器
1.9.15
UTF-8
4.0.1.1发布
/war/WEB-INF
3.1.3
org.springframework
弹簧试验
${spring.version}
测试
org.springframework
弹簧芯
${spring.version}
org.springframework
spring上下文
${spring.version}
公用记录
公用记录
org.springframework
春季方面
${spring.version}
org.springframework
SpringJDBC
${spring.version}
org.springframework
春季甲虫
${spring.version}
org.springframework
SpringWebMVC
${spring.version}
org.springframework
弹簧网
${spring.version}
com.google.appengine
appengine-api-1.0-sdk
${appengine.target.version}
javax.servlet
servlet api
2.5
假如
com.google.appengine.orm
datanucleus appengine
2.0.1.1
org.datanucleus
数据核核心
${datanucleus.version}
org.datanucleus
datanucleus api jpa
${datanucleus.version}
org.apache.geronimo.specs
geronimo-jpa_2.0_规范
1
org.datanucleus
数据核增强子
3.1.1
javax.persistence
持久性api
1.0.2
假如
com.fasterxml.jackson.core
杰克逊核心
2.2.3
com.fasterxml.jackson.core
杰克逊数据绑定
2.2.3
org.codehaus.jackson
jackson core asl
1.9.13
org.springframework.data
spring数据jpa
1.7.1.1发布
org.slf4j
slf4j简单
1.7.7
爪哇
JavaEEAPI
6
假如
${build.directory}/classes
org.apache.maven.plugins
2.5.1
电子编译器插件
1.7
1.7
org.apache.maven.plugins
maven战争插件
默认战争
准备包装
假的
假的
真的
2.3
真的
com.google.appengine
appengine maven插件
${appengine.target.version}
maven依赖插件
过程源
复制依赖项
${build.directory}/lib
org.datanucleus
maven datanucleus插件
3.0.2
JPA
${build.directory}/classes/com/signalmapper/data/model
**/*.类
交易可选
真的
真的
src/resources/META-INF
persistence.xml
org.datanucleus
数据核核心
${datanucleus.version}
进程类
增强
org.apache.maven.plugins
maven编译器插件
生成实体元模型
生成源
编译
1.6
1.6
真的
真的
真的
只有
-Aopenjpa.metamodel=true
${build.directory}/生成的源
org.apache.openjpa.persistence.meta.AnnotationProcessor6
编译
编译
编译
1.6
1.6

我是maven的新手，我不知道我错过了什么？

---

非常感谢您的帮助。

请显示错误的完整输出，而不仅仅是摘录。最好是显示完整的pom文件。嗨，khmarbaise，我已经添加了完整的pom.xml，如果这真的是您的pom文件，而不是您的一些错误

eccompiler插件

应写成

maven编译器插件

。为什么要两次定义maven编译器插件？顺便问一下：为什么要定义outputDirectory？没有道理。