实现用户登录，当用户输入用户或密码错误时，将页面重定向到错误提示页
判断页：
<%@ 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>Insert title here</title> </head> <body> <% String name=request.getParameter("name"); String password=request.getParameter("password"); %> <% if(name.equals("test")&&password.equals("56789")) { out.print("账号密码正确"); }else{ response.sendRedirect("homeworkerror.jsp"); } %> </body> </html>
用户输入页：
<%@ 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>Insert title here</title> </head> <body> <form action="homework0624-2.jsp" method="post"> 账号：<input type="text" name="name" > <br> 密码：<input type="password" name="password" > <br> <input type="submit" value="提交"> </form> </body> </html>
错误页：
<%@ 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>错误页面</title> </head> <body> 您的输入有误，请重新输入...
<%
response.setHeader("refresh", "10;URL=homework0624.jsp");
%>
</body> </html>
运行结果：
正确登录：
错误登录：
