maven jdk settings

  <profile>
         <id>jdk-1.7</id>
            <activation>
                      <activeByDefault>true</activeByDefault>

                     <jdk>1.7</jdk>

              </activation>

             <properties>

                      <maven.compiler.source>1.7</maven.compiler.source>

                  <maven.compiler.target>1.7</maven.compiler.target>

                  <maven.compiler.compilerVersion>1.7</maven.compiler.compilerVersion>

                </properties>

     </profile>