用户登录代码login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>XXX系统登录</title>
<script>
function loginform_check(){
var flag=true;
//自行补充完整
return flag;
}
function User_Reg(){
window.location="user_reg.jsp";
}
</script>
</head>
<body>
<form id="login_form" name="login_form" action="login_action.jsp" method="post"
onsubmi="return loginform_check()">
<table align=center>
<tr>
<td colspan="2" align="center">账号登录</td>
</tr>
<tr>
<td>账号</td>
<td>
<input type="text" name="userid" id="userid" >
</td>
</tr>
<tr>
<td>密码</td>
<td>
<input type="password" name="pass" id="pass" >
</td>
</tr>
<tr>
<td colspan=2 align=center>
<input type="submit" id="action" name="action" value="登录">
<input type="button" id="register" name="register" value="注册" onclick="User_Reg()">
</td>
</tr>
</table>
</form>
</body>
</html>
用户登录处理代码login_action.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%!
public boolean Login_Process(String userid,String pass,String coding){
boolean flag=false;
if(userid!=null && userid.equals("123456") && pass!=null && pass.equals("abc"))
flag=true;
return flag;
}
%>
<%
String userid="";
String pass="";
String coding="";
request.setCharacterEncoding("utf-8");
userid=request.getParameter("userid");
pass=request.getParameter("pass");
if(Login_Process(userid,pass,coding))
out.print("登录成功！");
else
out.print("登录失败！");
%>
<%=userid %>,<%=pass %>
</body>
</html>
2020.10.16-12节
用户登录代码login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD
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