Ｍａｖｅｎ設置ｊｄｋ版本

<build>  
    <plugins>  
      <plugin>  
        <groupId>org.apache.maven.plugins</groupId>  
        <artifactId>maven-compiler-plugin</artifactId>  
        <configuration>  
          <source>1.5</source>  
          <target>1.5</target>  
        </configuration>  
      </plugin>  
    </plugins>  
</build>