日期:2014-05-18  浏览次数:20867 次

servlet页面转向暂停--------急.在线待
我是在一个jsp(login.jsp)息..转向servlet(logincheck)判断合法性...并当用户密码正确的时候转另一个负责显示所有用户的servlet(listmain)........
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当输入正确有用户和密码转向负责显示所有用户的listmain时..代码似乎暂停.浏览器状态栏的进度条在一半的时候停止..页面停留在登陆页面(login.jsp)....?如果改成转向其它页面..可以正常跳转?
-------------------------------listmain.java的代码如下--
import   java.io.*;
import   javax.servlet.*;
import   javax.servlet.http.*;
import   DB.DbTool;
import   java.sql.*;
public   class   listmain   extends   HttpServlet
{
public   void   doGet(HttpServletRequest   request,HttpServletResponse   response)throws   IOException,ServletException
{
response.setContentType( "text/html;charset=utf-8 ");
PrintWriter   out=response.getWriter();
out.println( " <html> <head> ");
out.println( " <title> 数据列表 </title> </head> ");
out.println( " <table> ");
out.println( " <tr> <td> 重新登陆 <td> ");
out.println( " <td   colspan= '3 '> </td> ");
out.println( " <td> 添加用户 </td> </tr> ");
out.println( " <tr> <td> 用户编号 </td> ");
out.println( " <td> 用户名称 </td> ");
out.println( " <td> 用户密码 </td> ");
out.println( " <td   colspan= '2 '> 操--作 </td> </tr> ; ");
DbTool   list=new   DbTool();
ResultSet   rs=null;
String   sqlstr= "select   *   from   login ";
rs=list.getrs(sqlstr);
//rs.beforeFirst();
int   count=0;
try
{
while(rs.next())
{
        rs.last();
count=rs.getRow();//获得查询行的总数
rs.beforeFirst();
}
//输出数据---------------
for(int   i=1;i <=count;i++)
{
      out.println( " <tr> <td> <%=rs.getString( 'UserId ')%> </td> ");
      out.println( " <td> <%=rs.getString( 'UserName ')%> </td> ");
      out.println( " <td> <a   href= 'delete?id= <%rs.getString( 'UserId ')%> '> 修改 </a> </td> ");
      out.println( " <td> <a   href= 'modfiy?id= <%rs.getString( 'UserId ')%> '> 删除 </a> </td> ");
      out.println( " <td> <%=rs.getString( 'UserPwd ')%> </td> </tr> ");
    }
rs.close();
    //输出数据;;;;;
}
catch   (SQLException   ee)
{

}
out.println( " </table> ");
out.println( " </body> </html> ");
out.close();
}
public   void   doPost(HttpServletRequest   request,HttpServletResponse   response)throws   IOException,ServletException
{
doGet(request,response);
}

}




------解决方案--------------------
如果rs不为空,这就是死循环