上机实验
1消费总和
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ page contentType="text/html"%> <%@ page import="java.util.regex.Pattern"%> <%@ page import="java.util.regex.Matcher"%> <%!public double getPriceSum(String input) { Pattern pattern; Matcher matcher; String regex = "-?[0-9][0-9]*[.]?[0-9]*"; pattern = Pattern.compile(regex); matcher = pattern.matcher(input); double sum = 0; while (matcher.find()) { String str = matcher.group(); sum += Double.parseDouble(str); } return sum; }%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="cyan"> <p style="font-family:黑体;font-size:20"> <br>张三的菜单: <br> <% String str = "麻婆豆腐:20.6元,红烧肉:68.9"; %> <br><%=str%><br> <br> <b><i>消费总额:<%=getPriceSum(str)%></i><br> </b> <br>李四的菜单:<br> <% str = "剁椒鱼头:62.9元,烤鸭:199元,红焖大虾:289.9元"; %> <br><%=str%><br> <br> <b><i>消费总额:<%=getPriceSum(str)%></i><br> </b> </p> </body> </html>
<%@ page import = "java.time.LocalDate" %> <%@ page import = "java.time.LocalTime" %> <% LocalDate date = LocalDate.now(); LocalTime time = LocalTime.now(); %> <h2> 用户在 <%= date.getYear()%>/<%= date.getMonthValue()%>/<%= date.getDayOfMonth() %><br> <%= time.getHour()%>:<%= time.getMinute()%>:<%= time.getSecond()%>访问了网页。 </h2>
<%@ page contentType="text/html" %> <%@ page pageEncoding = "utf-8" %> <HTML><body> <h1>显示访问网页的日期、时间<br>（服务器端的日期、时间）</h1> <%@ include file="time.jsp" %> </body></HTML>