的Java的錯誤版本

Question

我的Java的當前版本爲7：

java -version 
java version "1.7.0_80" 
Java(TM) SE Runtime Environment (build 1.7.0_80-b15) 
Java HotSpot(TM) Server VM (build 24.80-b11, mixed mode) 

，我有命令mvn8其中設置java_home 8：

mvn8 -version 
Java HotSpot(TM) Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0 
Apache Maven 3.0.3 (r1075438; 2011-02-28 18:31:09+0100) 
Maven home: /home/.../apache-maven-3.0.3 
Java version: 1.8.0_66, vendor: Oracle Corporation 
Java home: /home/.../jdk1.8.0_66/jre 
Default locale: en_US, platform encoding: UTF-8 
OS name: "linux", version: "3.13.0-45-generic", arch: "i386", family: "unix" 

而現在的問題。當我運行我的個人資料中的一個（有其生成的文件行家Exec插件）項目：

mvn8 exec:exec -P mo2ja -o 

我得到異常：

Java HotSpot(TM) Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0 
[INFO] Scanning for projects... 
... 
ERROR:java.time.LocalDateTime cannot be resolved to a type. 
ERROR:java.time.LocalDate cannot be resolved to a type. 
[ERROR] Command execution failed. 
org.apache.commons.exec.ExecuteException: Process exited with an error: 2 (Exit value: 2) 
    at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:404) 
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166) 
    at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:764) 
    at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:711) 
    at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:289) 
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) 
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84) 
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) 
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) 
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) 
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319) 
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156) 
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537) 
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) 
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) 

如此看來，它仍然需要我的系統的Java。爲什麼當mvn版本打印java8？當我更改我的系統java時，它工作正常。這是maven的一些功能，或者它可以是我使用的插件問題？

UPDATE：

當我調試行家Exec插件我看這樣行：

[DEBUG] Executing command line: java -classpath ... org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader -control definitions.model -models entity.model,dao.model -source src/main/resources -target src-gen 

所以問題是如何爲我執行MVN

這裏使用相同的Java版本我的個人資料：

<profile> 
     <id>mo2ja</id> 
     <dependencies> 
      <dependency> 
       <groupId>org.sqlproc.model</groupId> 
       <artifactId>sqlmodel</artifactId> 
       <scope>runtime</scope> 
      </dependency> 
     </dependencies> 
     <build> 
      <plugins> 
       <plugin> 
        <groupId>org.codehaus.mojo</groupId> 
        <artifactId>exec-maven-plugin</artifactId> 
        <configuration> 
         <executable>java</executable> 
         <classpathScope>runtime</classpathScope> 
         <arguments> 
          <argument>-classpath</argument> 
          <classpath> 
           <dependency>org.sqlproc.model:sqlmodel</dependency> 
           <dependency>mysql:mysql-connector-java</dependency> 
           <dependency>org.sqlproc:sql-processor</dependency> 
           <dependency>org.slf4j:slf4j-api</dependency> 
          </classpath> 
          <argument>org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader</argument> 
          <argument>-control</argument> 
          <argument>definitions.model</argument> 
          <argument>-models</argument> 
          <argument>entity.model,dao.model</argument> 
          <argument>-source</argument> 
          <argument>src/main/resources</argument> 
          <argument>-target</argument> 
          <argument>src-gen</argument> 
         </arguments> 
        </configuration> 
       </plugin> 
      </plugins> 
     </build> 
    </profile> 

Answer 1

A讓你的maven編譯器插件允許級別爲1.8

<plugins> 
    <plugin> 
    <groupId>org.apache.maven.plugins</groupId> 
    <artifactId>maven-compiler-plugin</artifactId> 
    <version>3.5.1</version> 
    <configuration> 
     <source>1.8</source> 
     <target>1.8</target> 
    </configuration> 
    </plugin> 
</plugins>