Spring+SpringMvc-简单模拟微信红包

Posted 2021-07-17 CaoPengCheng&

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Spring+SpringMvc-简单模拟微信红包

环境

tomcat,idea,Spring,SpringMvc
环境搭建：请看idea搭建ssm

controller

package controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import service.HongService;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

@Controller
@RequestMapping(value="/Hong",produces="text/html;charset=UTF-8")
public class HongController {
    @Autowired
    HongService hongService;

    @RequestMapping(method= RequestMethod.POST)
    @ResponseStatus(HttpStatus.OK)
    public String post(HttpServletRequest request){
        hongService.qiang(request.getParameter("money"),request.getParameter("number"));
        return "hong";
    }
}

package controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import service.HongService;
import service.Impl.HongServiceImpl;

import javax.servlet.http.HttpServletRequest;
import java.math.BigDecimal;
import java.util.List;

@Controller
@RequestMapping(value="/Qiang",produces="text/html;charset=UTF-8")
public class QiangController {

    @RequestMapping(method= RequestMethod.POST)
    @ResponseStatus(HttpStatus.OK)
    public String post(HttpServletRequest request){
        String str;
        if(HongServiceImpl.x<HongServiceImpl.number) {
            str="恭喜您，抢到了！";
            List<Double> s = HongServiceImpl.getS();
            request.setAttribute("str", str);
            request.setAttribute("hhh", s.get(HongServiceImpl.x));
            HongServiceImpl.x += 1;
        }else{
            str="很遗憾，红包已抢完！！";
            request.setAttribute("str", str);
        }


        return "hong";
    }

}

service

package service;



public interface HongService {
    public void qiang(String m,String n);

}

package service.Impl;

import org.springframework.stereotype.Service;
import service.HongService;
import java.text.DecimalFormat;
import java.util.*;

@Service
public  class HongServiceImpl implements HongService  {

   private  static List<Double> s=new ArrayList<Double>() ;
    public static int x=0;
    public static int number;
    @Override
    public void qiang(String m, String n) {

        double max=Double.parseDouble(m) ;
        number=Integer.parseInt(n) ;
        DecimalFormat df = new DecimalFormat("#.00");
        max= Double.parseDouble(df.format(max));
        for(int i=1;i<=Integer.parseInt(n) ;i++) {
           // System.out.println("max="+max);
            double randomNumber = Math.random() ;
            randomNumber*=10;
            randomNumber= Double.parseDouble(df.format(randomNumber));

           //System.out.println("randomNumber="+randomNumber);
            if(randomNumber>=max/2){
                i--;
               // System.out.println("big");
                continue;
            }
            if (i == Integer.parseInt(n)) {
                max= Double.parseDouble(df.format(max));
                s.add(max);
                break;
            }
            s.add(randomNumber);
            max -= randomNumber;
        }
    }


    public static List<Double> getS() {
        return s;
    }

}

页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Insert title here</title>
		<style type="text/css">

			body{

				background:url("1.jpeg ");
				background-size:100% 100%;
			}
			.f{
				margin-top:50px;

				text-align: center;
			}
			.d{
				text-align: center;
				font-size:30px;
			}
			.r{
				margin-top:100px;
				text-align: center;
			}
		
		</style>
	
	
	</head>
	<body>


	<div class="f">
		<h1>点康姆红包</h1>
		<form action="Hong" method="post" class="r">
			<div class="d">
				<label >金额:</label>
				<input style="width: 320px;height: 30px" type="text" name="money">
			</div>
			<div class="d">
				<label >个数:</label>
				<input style="width: 320px;height: 30px" type="text" name="number">
			</div>
			<br>
			<input type="submit" style="width: 180px;height: 55px" value="发送" class="d">
		</form>
	</div>
	</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Insert title here</title>
		<style type="text/css">

			body{

				background-color:red;
			}
			.f{
				margin-top:50px;

				text-align: center;
			}
			.d{
				text-align: center;
				font-size:30px;
			}
			.r{
				margin-top:100px;
				text-align: center;
			}
		
		</style>
	
	
	</head>
	<body>


	<div class="f">
		<h1>点康姆红包</h1>
		<h2>${str}</h2>
		<h2>${hhh}</h2>
		<form action="Qiang " method="post" class="r">

			<input type="submit" style="width: 180px;height: 55px" value="开" class="d">
		</form>
	</div>
	</body>
</html>