get和post的区别：

http://localhost:8080/smart_toilet/show.jsp?uname=23&upwd=3425&uage=123   get方式（地址栏最多可以容纳4-5KB，如何请求大文件会出现容纳出错）

localhost:8080/smart_toilet/show.jsp   post方式（文件上传操作必须时post)

注册界面：register.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>智慧厕所用户注册</title>
 8 </head>
 9 <body>
10    <form  action="show.jsp"   method=“post”>
11            用户名：<input type="text" name="uname"/><br/> 
12           密码：<input type="password" name="upwd"/><br/> 
13            年龄：<input type="text" name="uage"/><br/> 
14         年龄：<input type="checkbox" name="up" value = "男"/>男
15         <input type="checkbox" name="up" value = "女"/>女
16         <br/>
17     <input type="submit"  value="注册">
18    </form>
19 
20 </body>
21 </html>

显示界面：show.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>用户注册显示界面</title>
 8 </head>
 9 <body>
10    <%
11    //设置编码
12    request.setCharacterEncoding("utf-8");
13    String name = request.getParameter("uname");
14    int age =Integer.parseInt(request.getParameter("uage"));
15    String pwd = request.getParameter("upwd");
16    String[] up = request.getParameterValues("up");
17    %>
18        注册成功，信息如下：<br/>
19       姓名:<%=name%><br/>
20       年龄:<%=age%><br/>
21       密码:<%=pwd%><br/>
22       性别:
23       <%
         if (up !=null)
24       for(String manorfileman:up)
25       {
26           out.print(manorfileman+"&nbsp;");//"&nbsp;"空格的意思
27       }%>
28 </body>
29 </html>