今天进行了模拟售卖机的javaweb的简单编写，编写了大概的流程。代码量大概50行。
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="toolse.Tll"%>
<%@page import="java.util.*"%>
<%@ page import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style>
p{
font-size: 25px}
</style>
<title>模拟自动售卖机</title>
</head>
<body>
<%
Connection conn = Tll.getConnection();
PreparedStatement pre = null;
ResultSet res = null;
String s1="",s2="";
String sql = "SELECT *FROM thing where name=? ";
try {
pre = conn.prepareStatement(sql);
pre.setString(1,"可乐");
res = pre.executeQuery();
while (res.next()) {
String num1 = res.getString("total");
String num2 =res.getString("num");
s1=num1;
s2=num2;
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
Tll.release(conn, pre, res);
}
%>
<img alt="" src="images/1000.jpg" width='200' height='200'/>
</br>
<p><% out.print(s1); %></p>
<p>剩余量<% out.print(s2); %> </p>
<form action="Sere" method="post">
<input type="hidden" name="method" value="findAll"/>
<input type="hidden" name="num" value="<%=s2 %>"/>
<input type="submit" value="购买">
</form>
</body>
</html>
稍微实现数据的更新，但是需要界面的优化。
标签：总结,4.4,每日,售卖机,编写,模拟 From： https://www.cnblogs.com/syhxx/p/17288095.html