JSP第七周作业
1.教材P78-79 例4-9
first01.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% double price=98.78; %> 商品编号 A1001,价格 8765 <a href="first02.jsp?id=A1001&price=8765">购买</a><br> 商品编号 A1002,价格 <%=price %> <a href="first02.jsp?id=A1002&price=<%=price %>">购买</a><br> </body> </html>
first02.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String id=request.getParameter("id"); String price=request.getParameter("price"); %> <b>商品编号：<%=id %><br> 商品价格：<%=price %> </body> </html>
2.教材P97 实验2
second01.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="second02.jsp" method=post name=form> 输入运算数，选择运算符：<br> <input type=text name="numberOne" size=6 /> <select name="op"> <option selected="selected" value="+">加 <option value="-">减 <option value="*">乘 <option value="/">除 </select> <input type=text name="numberTwo" size=6/><br> <input type="submit" name="submit" value="提交"/> </form> </body> </html>
second02.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String numberOne=request.getParameter("numberOne"); String numberTwo=request.getParameter("numberTwo"); String op=request.getParameter("op"); if(numberOne==null||numberOne.length()==0){ response.sendRedirect("second01.jsp");/* 获取方法 */ return; } else if(numberTwo==null||numberTwo.length()==0){ response.sendRedirect("second01.jsp"); return; } try{ double a=Double.parseDouble(numberOne); double b=Double.parseDouble(numberTwo); double r=0; if(op.equals("+")) r=a+b; else if(op.equals("-")) r=a-b; else if(op.equals("*")) r=a*b; else if(op.equals("/")) r=a/b; out.print(a+" "+op+" "+b+"-"+r); } catch(Exception e){ out.println("请输入数字字符"); } %> </body> </html>
3.制作一个登陆表单，输入账号和密码，如果账号密码相同，跳转到“登录成功”页面，否则跳转到“登录失败”页面。（加上JS非空验证）（选做，加验证码）
4.在上题的表单中增加一个checkbox,让用户选择“是否注册为会员"，如果注册为会员，则在显示时增加文本“欢迎您注册为会员”。
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <script> function lg() { if (form.user.value == "") { alert("账号不能为空!"); return; } if (form.password.value == "") { alert("密码不能为空!"); return; } if (form.validationCode.value == "") { alert("验证码不能为空，请输入验证码"); form.validationCode.focus(); return; } if (form.validationCode.value != form.validationCode1.value) { alert("请输入正确的验证码"); form.validationCode.focus(); return; } form.submit(); } </script> <% int intmethod1 = (int) ((((Math.random()) * 5)) + 1); int intmethod2 = (int) ((((Math.random()) * 5)) + 1); int intmethod3 = (int) ((((Math.random()) * 5)) + 1); int intmethod4 = (int) ((((Math.random()) * 5)) + 1); String intsum = intmethod1 + "" + intmethod2 + intmethod3 + intmethod4; %> <form action="login.jsp" method="post" name="form"> 用户名:<input type="text" name="user" /> <br> 密码：<input type="password" name="password" /><br> 验证码：<input type="text" name="validationCode" onKeyDown="if(event.keyCode==13){form.submit.focus();}" size="6"> <input type="button" name="validationCode1" size="1" value="<%=intsum%>"><br> 是否注册会员：<input type="radio" name="lg" value="是" />是 <input type="radio" name="lg" value="否" />否 <br> <input type="submit" value="登录" onclick="yz()" /> <br> </form> </body> </html>
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String user = request.getParameter("user") == null ? "" : request.getParameter("user"); String password = request.getParameter("password") == null ? "": request.getParameter("password"); if (user.equals(password)) { request.getRequestDispatcher("03ok.jsp").forward(request, response); } else { request.getRequestDispatcher("03no.jsp").forward(request, response); } %> </body> </html>
03ok.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <h1>登陆成功</h1> <% request.setCharacterEncoding("utf-8"); String lg=request.getParameter("lg"); if(lg.equals("是")){ out.print("欢迎您注册为会员"); } %> </body> </html>
03no.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <h1>登陆失败</h1> <% request.setCharacterEncoding("utf-8");%> </body> </html>
5.在页面1的表单内输人一个数字N，提交，能够在另一个页面打印N个“欢迎”字符串。
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="index1.jsp" method="post" name="form"> 输入任意整数N：<input type="text" name="name" > <input type="submit" value="提交"> </form> </body> </html>
index1.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("UTF-8"); String name=request.getParameter("name"); int n=Integer.parseInt(name); for(int i=0;i<n;i++){ out.print("欢迎"+"<br>"); } %> </body> </html>
6.在页面1中输入账号和密码,进行登录，
如果账号和密码相同，则认为成功登录到页面2,
在页面2中显示一个文本框输人用户姓名,输人之后提交,
在页面3中显示用户的账号和姓名。
（转发）request.getRequestDispacher.....forward
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <script> function lg() { if (form.user.value == "") { alert("用户名不能为空!"); form.user.focus(); return; } if (form.password.value == "") { alert("密码不能为空!"); form.password.focus(); return; } } </script> <form action="index2.jsp" method="post" name="form"> 账号：<input type="text" name="user"/><br> 密码：<input type="password" name="password"/><br> <input type="submit" value="登录"/> </form> </body> </html>
index2.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("UTF-8"); String user=request.getParameter("user"); String password=request.getParameter("password"); if(user.equals(password)){ request.getRequestDispatcher("index2ok.jsp").forward(request, response); } else{ request.getRequestDispatcher("index2no.jsp").forward(request, response); } %> </body> </html>
index2ok.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("UTF-8"); String user=request.getParameter("user"); %> <h1> 登陆成功！</h1> <form action="index3.jsp" method="post" name="form"> 用户姓名：<input type="text" name="username"/><br> <input type="submit" value="提交"/><br> <input type="hidden" name="user" value="<%= user %>"/> </form> </body> </html>
index2no.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("UTF-8"); %> <h1> 登陆失败！</h1> </body> </html>
index3.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("UTF-8"); String user=request.getParameter("user"); String username=request.getParameter("username"); out.print("账号："+user+"</br>"+"用户姓名:"+"   "+username); %> </body> </html>
