如何获取xml里面的节点值,,有代码
  <?xml version="1.0" encoding="utf-8" ?> 
- <flag>
- <page>
  <num>9</num> 
  </page>
- <row>
  <num>17</num> 
  </row>
- <t_user>
  <USERID>22</USERID> 
  <E_NUMBER>0001</E_NUMBER> 
  <LOGINNAME>17173</LOGINNAME> 
  <LOGINPWD>17173</LOGINPWD> 
  <U_NAME>17173</U_NAME> 
  <U_PHONE>17173</U_PHONE> 
  <U_EMAIL>qq@qq.com</U_EMAIL> 
  <ACC_HOLDER>17173</ACC_HOLDER> 
  <R_ID>0006</R_ID> 
  <STATE>1</STATE> 
  <REGTIME>2013-07-05T16:06:53+08:00</REGTIME> 
  <USVALID>2013-06-11T00:00:00+08:00</USVALID> 
  <S_PRJID>2,3</S_PRJID> 
  <T_PRJID>2</T_PRJID> 
  <R>1</R> 
  </t_user>
- <t_user>
  <USERID>55</USERID> 
  <E_NUMBER>0002</E_NUMBER> 
  <LOGINNAME>web_nopower</LOGINNAME> 
  <LOGINPWD>web_nopower</LOGINPWD> 
  <U_NAME>web_nopower</U_NAME> 
  <U_PHONE>110</U_PHONE> 
  <U_EMAIL>web_nopower@qq.com</U_EMAIL> 
  <ACC_HOLDER>web_nopower</ACC_HOLDER> 
  <R_ID>00014</R_ID> 
  <STATE>0</STATE> 
  <REGTIME>2013-07-09T00:00:00+08:00</REGTIME> 
  <USVALID>2013-07-10T00:00:00+08:00</USVALID> 
  <S_PRJID>2</S_PRJID> 
  <T_PRJID>2</T_PRJID> 
  <R>2</R> 
  </t_user>
  </flag>

xml里面有两张表,要分别获取这两张表里面的 <S_PRJID></S_PRJID> 和<T_PRJID></T_PRJID> 节点值得内容,然后取出来,修改

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