maven 指定java编译环境

<plugin>  
 
             <groupId>org.apache.maven.plugins</groupId>  
 
             <artifactId>maven-compiler-plugin</artifactId>  
 
             <configuration>  
 
                 <source>1.7</source>  
 
                 <target>1.7</target>  
 
             </configuration>  
 
         </plugin>