JSP第六次作业
1.登陆输入用户名密码，判断用户名和密码相同，登陆成功，session中保存用户的用户名，进入主页main.jsp，主页有一个退出按钮，点击，回到登陆页login.jsp。要求：退出登录后，如果在浏览器直接输入主页main.jsp，访问不了，直接跳到登陆页。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body> <form action="lose.jsp" name="fm"> 用户名：<input type="text" name="uname" /> 密码：<input type="password" name="mima" /> <input type="submit" value="登录" /> </form> </body> </html> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'lose.jsp' starting page</title> </head> <body> <% String uname=request.getParameter("uname"); String pas=request.getParameter("pas"); if(uname.equals(pas)){ session.setAttribute("uname", uname); request.getRequestDispatcher("regist.jsp").forward(request, response); } else{ response.sendRedirect("trium.jsp"); } %> </body> </html> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% String uname=(String)session.getAttribute("uname"); if(uname==null) response.sendRedirect("index.jsp"); %> 欢迎你<%=uname %> <a href="car.jsp">退出登录</a> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'trium.jsp' starting page</title> </head> <html> <body> <% session.invalidate(); response.sendRedirect("index.jsp"); %> </body> </html> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% session.invalidate(); response.setHeader("refresh", "5;url=index.jsp"); %> 退出成功！ </body> </html> </body> </html>
2.购物车和上一题一起，在main.jsp中做一个购物车，里面显示3个商品名和价格 每一个后面有一个加入购物车按钮，main.jsp中有一个按钮（或者超链接）可以显示购物车。（选作：在购物车中加删除按钮删除商品）
2.<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <form name="form" action="2.jsp" method="post"> 用户名：<input type="text" name="uname"><br> 密码：<input type="password" name="upwd"><br> <input type="submit" value="登录" > </form> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname=request.getParameter("uname"); String upwd=request.getParameter("upwd"); if(uname.equals(upwd)){ session.setAttribute("uname", uname); request.getRequestDispatcher("3.jsp").forward(request,response); }else{ request.getRequestDispatcher("4.jsp").forward(request,response); } %> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <h1>登陆成功！</h1> <% String uname = (String) session.getAttribute("uname"); if (uname == null) response.sendRedirect("1.jsp"); %> <form action="6.jsp" method="post"> 商品：<br> <br> 衣服<input type="checkbox" name="item" value="yifu">加入购物车 <br> 裤子<input type="checkbox" name="item" value="kuzi">加入购物车 <br> 裙子<input type="checkbox" name="item" value="qunzi">加入购物车<br><br> <input type="submit" value="加入购物车"> </form> <form name="form1" action="5.jsp" method="post"> <input type="submit" value="退出登录"> </form> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>no</title> </head> <body> <h1>登陆失败！！</h1> <%response.setHeader("refresh", "5;url=1.jsp");%> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>logout</title> </head> <body> <% session.invalidate(); response.setHeader("refresh", "5;url=1.jsp"); %> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String itemName[]=request.getParameterValues("item"); if(itemName==null){ out.print("未添加购物车"); } else{ for(int i=0;i<itemName.length;i++){ out.print("("+(i+1)+")"+itemName[i]+"<br>"); } } %> </body> </html>
