jsp 内置对象response,request，session 以及 cookie 对象的综合例子和 include指令

来源：互联网发布：技术军官知乎编辑：程序博客网时间：2024/05/16 01:04

<%@ 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>     <%    Cookie[] cook=request.getCookies();     if(cook!=null){     for(Cookie item:cook){     if(item.getName().equals("uname")){     //跳转     session.setAttribute("uname",item.getValue() );     response.sendRedirect("/Day_02shili/session/welcon.jsp");     }     }     }     %><form action="/Day_02shili/session/do.jsp" method="post">用户名<input name="uname" /> 密码 <input name="upwd" type="password" /><input type="submit"/></form></body></html>

<%@ 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>   <%    //设置编码格式    request.setCharacterEncoding("utf-8");  //获取 值     String uname=request.getParameter("uname");     String upwd=request.getParameter("upwd");     //判断 是否 有数据进来     if("1".equals(uname)&&"1".equals(upwd)){     //跳转     //用 session 保存值      session.setAttribute("uname", uname);          //使用 cookie     Cookie cook=new Cookie("uname",uname);     Cookie cookpwd=new Cookie("upwd",upwd);              cook.setMaxAge(60);     //用 cook 进行 响应     response.addCookie(cook);     response.addCookie(cookpwd);          request.getRequestDispatcher("/session/welcon.jsp").forward(request,response);          }else{     //如果失败 返回 首页      response.sendRedirect("/Day_02shili/session/login.jsp");     }  %></body></html>

<%@ 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>   欢迎你<%=session.getAttribute("uname") %>   <hr/>   <a href="/Day_02shili/session/loginout.jsp">注销</a></body></html>

<%@ 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> <%     //清除 指定的 session 值     session.removeAttribute("uname");   //清除后 跳转到 登录页面   response.sendRedirect("/Day_02shili/session/login.jsp"); %></body></html>

<%@ 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>   <%   //先判断有没有值   Object  uname= session.getAttribute("uname");  if(uname==null){  response.sendRedirect("/Day_02shili/session/login.jsp");  }   %></body></html>

<%@ 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>图书列表 测试 include 方法</title></head><body> <%@include file="yanZhen.jsp" %>  <h1>图书列表 必须登录</h1></body></html>

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jsp 内置对象response,request，session 以及 cookie 对象的综合例子 和 include指令

jsp 内置对象response,request，session 以及 cookie 对象的综合例子和 include指令