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  • 大学jsp实验5request,response

    1、request对象的使用

    (1)编写一个包含有表单的JSP页面form.jsp,其中包含可以输入姓名和出生地的文本框,提交表单后在另一个页面中显示用户提交的姓名和出生地。请写出相应代码:

    form.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>form</title>
     5 </head>
     6 <body>
     7 <form action="display.jsp"method="post" name="name">  
    8
    姓名:<input type="text" name="username"> 9 出生地:<input type="text" name="from"> 10 <input type="submit" name="submit" value="提交"> 11 </form> 12 </body> 13 </html>

    display.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>display</title>
     5 </head>
     6 <body>
     7 <%
     8 
     9     out.print("姓名:"+request.getParameter("from"));
    10     out.print("<br>");
    11     out.print("出生地:"+request.getParameter("username"));
    12 %>
    13 </body>
    14 </html>

     (2)编写一个名为shiyan5_2form.jsp的JSP文件,浏览效果如下图所示:

     

    再编写一个名为shiyan5_2display.jsp的JSP文件,用来显示用户提交的信息,浏览效果如下图所示:

     请编写相应代码:(注意中文乱码的处理):

     shiyan5_2form.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>test2_1</title>
     5 </head>
     6 <body>
     7 <p>请输入下列信息</p>
     8 <form action="shiyan5_2display.jsp" method="post" name="name">
     9     输入您的姓名:<input type="text" name="username"><br>
    10     请选择您的性别:<input type="radio" name="sex" value="男">11     <input type="radio" name="sex" value="女"><br>
    12     您喜欢的歌手:<input type="checkbox" name="singer" value="张学友">张学友
    13     <input type="checkbox" name="singer" value="李健">李健
    14     <input type="checkbox" name="singer" value="刘德华">刘德华
    15     <input type="checkbox" name="singer" value="王菲">王菲<br>
    16     <input type="hidden" name="hide" value="这是隐藏信息">
    17     <input type="submit" value="提交">
    18 </form>
    19 </body>
    20 </html>

     shiyan5_2display.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>test2_1</title>
     5 </head>
     6 <body>
     7 <%
     8     request.setCharacterEncoding("utf-8");
     9 
    10     out.print(request.getParameter("username"));
    11     out.print("<br>" + request.getParameter("sex") + "<br>");
    12     String[] singer = request.getParameterValues("singer");
    13     if (singer == null) {
    14         out.print("请输入相关信息");
    15     } else {
    16         for (String s : singer) {
    17             out.print(s + "  ");
    18         }
    19     }
    20     out.print("<br>" + request.getParameter("hide"));
    21 %>
    22 </body>
    23 </html>

     (3)编写一个shiyan5_3_a.jsp文件,浏览效果如下图所示:

    单击“确认”超链接后,显示如下shiyan5_3_b.jsp页面:

    请写出相应代码:

     shiyan5_3_a.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>test2_1</title>
     5 </head>
     6 <body>
     7 <p>信息确认:</p>
     8 <hr>
     9 <%
    10     String name = "张三";
    11     String banji = "2015级1班";
    12     String project = "跳远";
    13     out.print("姓名:"+name+",班级:"+banji+",申报项目:"+project);
    14 %><br>
    15 如信息无误,请点击<a href="shiyan5_3_b.jsp?name=张三&banji=2015级1班&project=跳远">确认</a>
    16 </form>
    17 </body>
    18 </html>

    shiyan5_3_b.jsp:

     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>test2_1</title>
     5 </head>
     6 <body>
     7 <p>您的信息如下:</p>
     8 <hr>
     9 <%
    10     request.setCharacterEncoding("utf-8");
    11     out.print("姓名:"+request.getParameter("name")+"<br>");
    12     out.print("班级:"+request.getParameter("banji")+"<br>");
    13     out.print("项目:"+request.getParameter("project"));
    14 %>
    15 </body>
    16 </html>

    2、response对象的使用

    (1)下面的JSP页面,如果请求该页面时想让页面以word方式打开,请在横线上填写正确的代码:

    <%@ page language="java" contentType="text/html; charset=UTF-8"%>

                                                               

    <html>

    <head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

    <title>Insert title here</title>

    </head>

    <body bgcolor=cyan style="font-size:28px">

    <p>学习response对象的setContentType方法</p>

    </body>

    </html>

    1 <% response.setContentType("application/msword;charset=UTF-8"); %>

    (2)编写如下登录页面shiyan5_4.jsp:

    在其中输入用户名和密码,如用户名和密码无误(正确的用户名和密码自定,如用户名为张三,密码为123456)则显示欢迎页面shiyan5_4_receive.jsp,如下图所示:

    若用户或密码错误,则仍然显示登录页面,等待用户输入用户名和密码。此外,如用户直接请求shiyan5_4_receive.jsp,仍会显示登录页面。

    请写出相应代码:

    shiyan5_4.jsp:
     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title></title>
     5 </head>
     6 <body>
     7 <p style="text-align: center;">系统登陆</p>
     8 <hr>
     9 <form action="shiyan5_4_receive.jsp" method="post" name="login" style="text-align: center">
    10     用户名:<input type="text" name="username"><br><br>
    11     密  码:<input type="password" name="password"><br><br><br>
    12     <input type="submit" name="submit" value="确定">
    13     <input type="reset" name="reset" value="取消">
    14 </form>
    15 </body>
    16 </html>
    shiyan5_4_recevie.jsp:
     1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
     2 <html>
     3 <head>
     4     <title>Title</title>
     5 </head>
     6 <body>
     7 <%
     8     request.setCharacterEncoding("utf-8");
     9     String username = "";
    10     String password = "";
    11     username = request.getParameter("username");
    12     password = request.getParameter("password");
    13     if (username==null || password==null) {
    14         response.sendRedirect("shiyan5_4.jsp");
    15     }else {
    16         if (!username.equals("张三") || !password.equals("123456")) {
    17             response.sendRedirect("shiyan5_4.jsp");
    18         }
    19     }
    20 
    21 %>
    22 登陆成功,用户<%=username%>,你好!
    23 </body>
    24 </html>
    昔日我曾苍老,如今风华正茂(ง •̀_•́)ง
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  • 原文地址:https://www.cnblogs.com/lgqrlchinese/p/8987922.html
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