[Java知识库]Spring Boot 开发入门--- RESTful 接口的 Web服务

创建一个spring boot的web项目

创建如下包

Count代码

package com.example.demo.bean;

public class Count {
    private int count;

    public int getCount() {
        return count;
    }
    public void setCount(int count)
    {
        this.count=count;
    }
    
}

controller代码：

package com.example.demo.controller;
import com.example.demo.bean.Count;
import com.example.demo.service.ResourseService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
public class controller {
    @Autowired
    ResourseService resourseService;
    @RequestMapping(value = "/me/count",method = RequestMethod.PUT)
    @ResponseBody
    public void initCount(@RequestBody Count count) {
        resourseService.initCount(count);
    }
    @RequestMapping(value = "/me/count", method = RequestMethod.POST)
    @ResponseBody
    public void modifyCount(@RequestBody Count count){
        resourseService.addCount(count);
    }

    @RequestMapping(value = "/me/count", method = RequestMethod.GET)
    @ResponseBody
    public  Count getCount() {
        return resourseService.getCount();
    }

}

manager代码

package com.example.demo.manager;

public class ResourseManager {




        public static ResourseManager getInstance;
        private int count = 0;
        private static ResourseManager instance = new ResourseManager();
        private ResourseManager(){}
        public static ResourseManager getInstance() {
            return instance;
        }`在这里插入代码片`
        public synchronized void addCount(int i){
            count = count+i;
        }
        public synchronized void minusCount(int i){
            count= count-i;
        }
        public int getCount(){
            return count;
        }
    }
service代码

```css
package com.example.demo.service;

import com.example.demo.bean.Count;
import com.example.demo.manager.ResourseManager;
import org.springframework.stereotype.Service;

import java.awt.*;
@Service
public class ResourseService {

    public void initCount(Count count) {
        if (count != null){
            ResourseManager.getInstance().addCount(count.getCount());
        }
    }

    public void addCount(Count count) {
        if (count!=null){
            ResourseManager.getInstance.minusCount(count.getCount());
        }
    }

    public Count getCount() {
        Count count = new Count();
        count.setCount(ResourseManager.getInstance().getCount());
        return count;
    }
}