<%@ page language="java" contentType="text/html" import="java.util.*" pageEncoding="utf-8"%> <%@ page import="java.util.regex.Pattern"%> <%@ page import ="java.util.regex.Matcher"%> <!DOCTYPE html> <html> <head> </head> <%! 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; } %> <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元"; %> <br><%=str%></br> <br><b><i>消费总和：<%=getPriceSum(str) %></i></b></br> <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>消费总和：<%=getPriceSum(str) %></i></b></br> </p> </body> </html>