maven project 更新总是jre-1.5

解决如下：

<build>
    <plugins>  
        <plugin>    
            <groupId>org.apache.maven.plugins</groupId>    
               <artifactId>maven-compiler-plugin</artifactId>    
               <configuration>    
                   <source>jdk版本号</source>    
                   <target>同上</target>    
               </configuration>    
        </plugin>  
    </plugins>
</build>