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if(rs.next()){
response.sendRedirect("admin.jsp");
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String admin = request.getParameter("user");
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int num = 0;
rs=stmt.executeQuery("select pass from admin where user="+user);
while(rs.next()){
  pass = rs.getString(1);
  num=1;
}
if(num == 1){
  response.sendRedirect("admin.jsp");
}else{
  response.sendRedirect("login.jsp");//Ìø×ªµ½×¢²áÒ³Ãæ

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response.sendRedirect("admin.jsp");
}else{
response.sendRedirect("login.jsp");//Ìø×ªµ½×¢²áÒ³Ãæ
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