第七周上机练习
1.教材P78-79 例4-9
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<% double price=98.78;
%>
<p style="font-family: 宋体;font-size: 36; color:blue">
商品编号A10001，价格 8765
<a href="ex02.jsp?id=A10001&price=8765">购买</a><br>
商品编号A10002，价格<%=price %>
<a href="ex02.jsp?id=A10002&price=<%=price %>">购买</a><br>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<p style="font-family: 宋体;font-size: 36"; color:blue>
<% String id=request.getParameter("id");
String price=request.getParameter("price");
out.print("商品编号："+id+"</br>"+"商品价格"+price);
%>
</body>
</html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<form action="ex02.jsp">
<p style="font-family: 宋体;font-size: 18; color:blue">
输入运算数，选择运算符号：
<input type="text" name="one" size=6/>
<select name="op">
<option value="+">加</option>
<option value="-">减</option>
<option value="*">乘</option>
<option value="/">除</option>
</select>
<input type="text" name="two" size=6/>
<br><input type="submit" value="提交"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<p style="font-family: 宋体;font-size: 18; color:black">
<%
String one=request.getParameter("one");
String two=request.getParameter("two");
String op=request.getParameter("op");
if(one==null||one.length()==0){
response.sendRedirect("ex01.jsp");
return;
}
else if(two==null||two.length()==0){
response.sendRedirect("ex01.jsp");
return;
}
double a=Double.parseDouble(one);
double b=Double.parseDouble(two);
double r=0;
try{
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.print("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）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<script type="text/javascript">
function login(){
if(logindo.admin.value==""){
alert("请输入账号");
return;
}
else if(logindo.pass.value==""){
alert("请输入密码");
return;
}
logindo.submit();
}
</script>
<form action="ex02.jsp" name ="logindo">
<p style="font-family: 宋体;font-size: 18; color:blue">
账号：
<input type="text" name="admin" size=6/>
密码：
<input type="password" name="pass" size=6/>
<br><input type="button" value="登录" onclick="login()"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<%
String admin=request.getParameter("admin");
String pass=request.getParameter("pass");
if(admin.equals(pass)){
request.getRequestDispatcher("ok.jsp").forward(request, response);
}
else{
response.sendRedirect("no.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
登录失败！！！！！！！
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
登录成功！！！！！！！
</body>
</html>
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”。
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<script type="text/javascript">
function login(){
if(logindo.admin.value==""){
alert("请输入账号");
return;
}
else if(logindo.pass.value==""){
alert("请输入密码");
return;
}
logindo.submit();
}
</script>
<form action="ex02.jsp" name ="logindo">
<p style="font-family: 宋体;font-size: 18; color:blue">
账号：
<input type="text" name="admin" size=6/>
密码：
<input type="password" name="pass" size=6/>
是否注册会员：
<input type="checkbox" name="yes" value="注册"/>注册
<input type="checkbox" name="yes" value="不注册"/>不注册
<br><input type="button" value="登录" onclick="login()"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<%
String admin=request.getParameter("admin");
String pass=request.getParameter("pass");
if(admin.equals(pass)){
request.getRequestDispatcher("ok.jsp").forward(request, response);
}
else{
response.sendRedirect("no.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<h1>登录失败！！！！！！！</h1>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<h1>登录成功！！！！！！！</h1>
<%
String []yes=request.getParameterValues("yes");
for(int i=0;i<yes.length;i++){
if(yes[i].equals("注册")){
out.print("注册为会员");
}
} %>
</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。
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<form action="ex02.jsp" name ="logindo">
<p style="font-family: 宋体;font-size: 18; color:blue">
请输入数字
<input type="text" name="num" size=6/>
<br><input type="submit" value="提交"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<%
String num=request.getParameter("num");
int n=Integer.parseInt(num);
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
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<script type="text/javascript">
function login(){
if(logindo.admin.value==""){
alert("请输入账号");
return;
}
else if(logindo.pass.value==""){
alert("请输入密码");
return;
}
logindo.submit();
}
</script>
<form action="ex02.jsp" name ="logindo">
<p style="font-family: 宋体;font-size: 18; color:blue">
账号：
<input type="text" name="admin" size=6/>
密码：
<input type="password" name="pass" size=6/>
<br><input type="button" value="登录" onclick="login()"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<%
String admin=request.getParameter("admin");
String pass=request.getParameter("pass");
if(admin.equals(pass)){
request.getRequestDispatcher("ok.jsp").forward(request, response);
}
else{
response.sendRedirect("no.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<%
String admin=request.getParameter("admin");
String uname=request.getParameter("uname");
out.print("账号："+admin+"</br>"+"用户名称"+uname);
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
登录失败！！！！！！！
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
登录成功！！！！！！！
<% String admin=request.getParameter("admin"); %>
<form action="ex03.jsp">
用户名：<input type="text" name="uname" />
<input type="submit" value="提交"/>
<input name="admin" type="hidden" value="<%= admin %>">
</form>
</body>
</html>
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