【SpringBoot】使用IDEA创建一个SpringBoot服务，并创建三个restful风格的接口

2020-12-13 04:39

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标签：pos tco stat spring this not 初始 autowired 生成

项目创建：

选择创建一个springboot项目：

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输入一下项目信息，一般就是maven的信息填一下：

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选择spring web starter：

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然后finish就OK了。

编码：

演示的功能就是提供一个计数器功能，可以初始化计数器，修改计数器，查询计数器当前值。没有使用数据库，直接用一个单例类来模拟了，项目结构如下：

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Count：

 1 package com.me.redis.resouce.bean;
 2 
 3 public class Count {
 4     private int count;
 5 
 6     public int getCount() {
 7         return count;
 8     }
 9 
10     public void setCount(int count) {
11         this.count = count;
12     }
13 }

ResourceController：

 1 package com.me.redis.resouce.controller;
 2 
 3 import com.me.redis.resouce.bean.Count;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.web.bind.annotation.*;
 6 import com.me.redis.resouce.service.ResourceService;
 7 
 8 @RestController
 9 public class ResourceController {
10 
11     @Autowired
12     ResourceService resourceService;
13 
14     @RequestMapping(value = "/me/count", method = RequestMethod.PUT)
15     @ResponseBody
16     public String initCount(@RequestBody Count count){
17         resourceService.initCount(count);
18         return "init count success";
19     }
20 
21     @RequestMapping(value = "/me/count", method = RequestMethod.POST)
22     @ResponseBody
23     public String modifyCount(@RequestBody Count count){
24         resourceService.addCount(count);
25         return "modify count success";
26     }
27 
28     @RequestMapping(value = "/me/count", method = RequestMethod.GET)
29     @ResponseBody
30     public  Count getCount()
31     {
32         return resourceService.getCount();
33     }
34 }

ResourceService：

 1 package com.me.redis.resouce.service;
 2 
 3 import com.me.redis.resouce.bean.Count;
 4 import com.me.redis.resouce.manager.ResourceManager;
 5 import org.springframework.stereotype.Service;
 6 
 7 @Service
 8 public class ResourceService {
 9     public void addCount(Count count){
10         if (count != null){
11             ResourceManager.getInstance().addCount(count.getCount());
12         }
13     }
14 
15     public void minusCount(Count count){
16         if (count != null) {
17             ResourceManager.getInstance().minusCount(count.getCount());
18         }
19     }
20 
21     public Count getCount()
22     {
23         Count count = new Count();
24         count.setCount(ResourceManager.getInstance().getCount());
25         return count;
26     }
27 
28     public void initCount(Count count){
29         if (count != null) {
30             ResourceManager.getInstance().initCount(count.getCount());
31         }
32     }
33 }

ResourceManager：

 1 package com.me.redis.resouce.manager;
 2 
 3 public class ResourceManager {
 4     private int count = 0;
 5 
 6     private static ResourceManager instance = new ResourceManager();
 7 
 8     private ResourceManager(){}
 9 
10     public static ResourceManager getInstance(){
11         return instance;
12     }
13 
14     public synchronized void addCount(int i){
15         count = count + i;
16     }
17 
18     public synchronized  void minusCount(int i){
19         count = count -i;
20     }
21 
22     public int getCount(){
23         return count;
24     }
25 
26     public void initCount(int i){
27         count = i;
28     }
29 }

ResouceApplication是idea自动生成的：

 1 package com.me.redis.resouce;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 
 6 @SpringBootApplication
 7 public class ResouceApplication {
 8 
 9     public static void main(String[] args) {
10         SpringApplication.run(ResouceApplication.class, args);
11     }
12 
13 }