java.lang.NumberFormatException: null

Question

java

Answer 1

HTTP Status 500 - 
type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception 
java.lang.NumberFormatException: null
java.lang.Integer.parseInt(Integer.java:454)
java.lang.Integer.valueOf(Integer.java:582)

Answer 2

<form action="addPowerAction" method="post">
 <table width="100%" border="0" cellspacing="1" cellpadding="0" bgcolor="#CCCCCC" style=" line-height:40px; margin-top:40px; text-align:left; ">
              <b>
         <span class="HT_user60px">账  号：</span>
         <span class="HT_userright"><input type="text" name="power.id1"/></span><br/><br/>
        </b>
              <b>
         <span class="HT_user60px">状  态：</span>
         <span class="HT_userright"><input type="text" name="power.course"/></span><br/><br/>
        </b>
        <b>
         <span class="HT_user60px">描  述：</span>
         <span class="HT_userright"><input type="text" name="power。bout"/></span><br/><br/>
        </b>
        
        <b>
         
         <span colspan="2">
         <input type="submit" value="添加用户"> </input>
         </span>
        </b>
</table>
  </form>