使用JAXP默认的分析程序编写一个应用程序，程序如下的XML文档，输出为XML文档后面的输出格式。
XML文档：
<？xml  version  ="1.0"?>

<community>
     <family>
          <parent>
                       John
                       <child>Sue</child>
                       <child>Bob</child>
                       <child>Mary</child>
           </parent>
      </family>
      <family>
           <parent> 
                        Mike
                        <child>
                                  Bill
                                  <GRANDCHILD>Jane</grandchild>
                         </child>
                         <child>Gary </child>
            <parent> 
 <family>
输出为：
Head    of   family : Iohn
John's   Children:
            1:Sue
            2.Bob
            3.Mary