‘build.plugins.plugin.version‘ for org.apache.maven.plugins:maven-compiler-plugin is missing

错误环境：maven-compiler-plugin 插件版本信息错误提示的解决方法

使用maven-compiler-plugin 时 
POM文件如下：

<plugins>  
     <plugin>  
        <artifactId>maven-compiler-plugin</artifactId>  
       <configuration>  
            <source>1.6</source>  
          <target>1.6</target>  
          <encoding>UTF-8</encoding>  
        </configuration>  
    </plugin>  
</plugins>  

报如下提示，字面意思就是没有指定版本信息 

[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com.xxx.xxx:xxxx:jar:0.0.1-SNAPSHOT 
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 72, column 12 
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. 
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects. 
[WARNING] 

对照官网用法：http://maven.apache.org/plugins/maven-compiler-plugin/usage.html 

添加下面的代码：

<version>2.3.2</version> 

修改后如下就OK了 

<plugins>  
     <plugin>  
        <artifactId>maven-compiler-plugin</artifactId>  
         <version>2.3.2</version>  
       <configuration>  
            <source>1.6</source>  
          <target>1.6</target>  
          <encoding>UTF-8</encoding>  
        </configuration>  
    </plugin>  
</plugins>