public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
String username=request.getParameter("username");
String password=request.getParameter("password");
if(username.equals("admin")&&password.equals("666")){
out.println("登陆成功");
}else{
out.println("登陆失败");
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
<body>
<%request.setCharacterEncoding("utf-8"); %>
<form action="FirstServlet" method="post" name="form1">
账号：<input type="text" name="username" id="username">
<br><br>
密码： <input type="password" name="password" id="password">
<br> <br>
<input type="submit" value="登录" name="denglu" onclick="yz()">
</form>
</body>