第七次jsp
1.教材P78-79 例4-9
<body>
<%double price=98.78; %>
<p style="font-family: 宋体;font-size: 36;color: red">
商品编号A1001，价格8765
<a href="show1.jsp?id=A1001&price=98.78 ">购买</a><br>
商品编号A1002，价格<%=price%>
<a href="show1.jsp?id=A1002&price=<%=price%>" >购买</a>
</p>
</body>
<body>
<% String id=request.getParameter("id");
String price=request.getParameter("price");
%>
商品编号<%=id%><br>
商品价格<%=price%>
</body>
2.教材P97 实验2
<body> <form action="show2.jsp" method=post name="from"> <p>输入运算的数，选择运算符：<br> <input type=text name="one"/> <select name="operator"> <option value="+">加 <option value="-">减 <option value="*">乘 <option value="/">除 </select> <input type=text name="two"/> <br><input type="submit"name="submit" value="提交" size="4"/> </form> </body>
<body>
<%
String a1=request.getParameter("one");
String b1=request.getParameter("two");
String operator=request.getParameter("operator");
double a=Double.parseDouble(a1);
double b=Double.parseDouble(b1);
double s=0;
if(operator.equals("+"))
s=a+b;
else if(operator.equals("-"))
s=a-b;
else if(operator.equals("*"))
s=a*b;
else if(operator.equals("/"))
s=a/b;
out.print("运算结果是："+s);
%>
</body>
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”。
<head>
<script type="text/javascript">
function yanzheng(){
if(zhuce.user.value==""){
alert("账号不能为空");
return;
}
if(zhuce.pass.value==""){
alert("密码不能为空");
return;
}
zhuce.submit();
}
</script>
</head>
<body>
<form action="show1.jsp" method="post" name="zhuce">
用户名
<input type="text" name="user" value="" /><br>
登录密码
<input type="password" name="pass" value="" /><br>
是否注册为会员：<br>
是<input type="checkbox" name="vip" value="11">
否<input type="checkbox" name="vip" value=""><br>
<input type="button" value="登录" onclick="yanzheng()">
</form>
</body>
<body>
<%
request.setCharacterEncoding("utf-8");
String user=request.getParameter("user");
String pass=request.getParameter("pass");
String vip=request.getParameter("vip");
if(vip.equals("")){
if(user.equals(pass)){
request.getRequestDispatcher("ok.jsp").forward(request, response);}
else
request.getRequestDispatcher("no.jsp").forward(request, response);
}
else{
if(user.equals(pass)){
request.getRequestDispatcher("ok1.jsp").forward(request, response);}
else
request.getRequestDispatcher("no.jsp").forward(request, response);
}
%>
<body>
欢迎您注册为会员<br>
登录成功
</body>
<body>
登录成功
</body>
<body>
登录失败
</body>
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。
<body>
<form action="show2.jsp" method="post" name="zhuce">
输入一个数字N：<br>
<input type="text" name="number" value="" /><br>
<input type="submit" value="提交">
</form>
</body>
<body>
<%
request.setCharacterEncoding("utf-8");
String a=request.getParameter("number");
int num=Integer.parseInt(a);
for(int i=0;i<num;i++){
%>
欢迎<%} %>
</body>
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
<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>
<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>
<body>
<%
request.setCharacterEncoding("UTF-8");
%>
<h1> 登陆失败！</h1>
</body>
<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>
<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>
