java

关注公众号 jb51net

关闭
首页 > 软件编程 > java > Java模拟售票功能

Java多线程之简单模拟售票功能

作者:乔 三石

这篇文章主要介绍了Java多线程之简单模拟售票功能,文中有非常详细的代码示例,对正在学习java的小伙伴们有很好地帮助,需要的朋友可以参考下

一、创建

在这里插入图片描述

二、完整代码

package com.ql;

import lombok.SneakyThrows;
import okhttp3.Call;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

import java.io.IOException;

public class Mythread extends Thread {
    public Mythread(String name) {
        super(name);
    }

    @SneakyThrows
    @Override
    public void run() {
        for (; ; ) {
            //锁的状态是默认是打开状态
            //获取锁的状态
            int lockStatus = this.findLockStatus();
            if (lockStatus == 0) {
                //修改锁的状态 =>>锁定
                this.locked();
                //获取总票数
                int tickets = this.findTickets();
                //剩余票数
                int i = this.remainVotes();
                //判断票数
                if (tickets < 1) {
                    //已售卖完 跳出循环
                    break;
                } else {
                    //卖一张票
                    int remainVotes = this.saleOneTicket();
                    System.out.println(this.getName() + "当前的票数:" + tickets);
                    System.out.println(this.getName() + "售票后:" + remainVotes);
                    //  释放锁
                    this.unlock();
                }
            }
        }


    }

    /**
     * 剩余票数
     *
     * @return
     * @throws IOException
     */
    private int remainVotes() throws IOException, InterruptedException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/remainVotes").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();

        String string = response.body().string();
        int ticketsVote = Integer.parseInt(string);
        return ticketsVote;
    }

    /**
     * 释放锁
     */
    private void unlock() throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/unlock").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();
    }

    /**
     * 卖票一张
     */
    private int saleOneTicket() throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/saleOneTicket").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();
        String string = response.body().string();
        int remainVotes = Integer.parseInt(string);
        return remainVotes;
    }

    /**
     * 获取锁的状态
     */
    private int findLockStatus() throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/findLock").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();
        String string = response.body().string();
        int lockStatus = Integer.parseInt(string);
        return lockStatus;
    }

    /**
     * 修改锁状态
     */
    private int locked() throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/locked").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();
        String string = response.body().string();

        int lockStatus = Integer.parseInt(string);
        return lockStatus;
    }


    /**
     * 查看总票数
     *
     * @throws IOException
     */
    private int findTickets() throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url("http://localhost:8080/lock/findTickets").build();
        Call call = okHttpClient.newCall(request);
        Response response = call.execute();
        String string = response.body().string();
        Integer tickets = Integer.parseInt(string);
        return tickets;
    }
}

package com.ql;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/lock")
public class ClientService {
    /**
     * 总票数
     */
    private static Integer tickets = 100;

    /**
     * 锁的状态 0:未锁   1:锁
     */
    private static Integer lockStatus = 0;

    /**
     * 卖票
     */
    @RequestMapping("/saleOneTicket")
    public Integer saleOneTicket() {
        return tickets = tickets - 1;
    }

    /**
     * 查看总票数
     */
    @RequestMapping("/findTickets")
    public Integer findTickets() {
        return tickets;
    }

    /**
     * 查看锁的状态
     */
    @RequestMapping("/findLock")
    public synchronized Integer findLock() {
        Integer lock=lockStatus;
        //改变锁状态,使线程串行执行
        this.locked();
        return lock;
    }

    /**
     * 改变锁状态
     */
    @RequestMapping("/locked")
    public synchronized int locked() {
        //更改锁的状态为1(上锁),避免多个线程同时获取锁的状态都为0(未上锁),从而导致线程安全问题
        lockStatus = 1;
        return lockStatus;
    }

    /**
     * 释放锁
     */
    @RequestMapping("/unlock")
    public synchronized int unlock() {
        return lockStatus = 0;
    }

    /**
     * 剩余票数
     *
     * @return
     */
    @RequestMapping("/remainVotes")
    public int remainVotes() {

        return tickets;
    }

}

三、流程图解析

在这里插入图片描述

到此这篇关于Java多线程之简单模拟售票功能的文章就介绍到这了,更多相关Java模拟售票功能内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

您可能感兴趣的文章:
阅读全文