本系列博客汇总在这里：JSP 汇总
forward 标签的作用是请求转发！forward 标签的作用与 RequestDispatcher#forward() 方法相同。 示例:
源码提供：
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>Insert title here</title> </head> <body> <form action="/jsp_demo5/login.jsp" method="post"> <input type="hidden" name="isSubmit" value="1"> 用户名：<input type="text" name="username"><br/> 密码：<input type="password" name="password"><br> <input type="submit" value="登录"><br> </form> <% String isSubmit = request.getParameter("isSubmit"); if("1".equals(isSubmit)) { String username = request.getParameter("username"); String password = request.getParameter("password"); if("wyx".equals(username)&&"123".equals(password)) { request.setAttribute("userInfo",username+" 你好，欢迎登录"); %> <jsp:forward page="/success.jsp"></jsp:forward> <% } else { %> <jsp:forward page="/fail.jsp"></jsp:forward> <% } } %> </body> </html>如有错误，欢迎指正！
