springboot的入门小栗子

墨蓝 2022-12-17 01:16 80阅读 0赞

## 1：创建项目 ##

`new`\->`project`然后选择左侧`Spring Initizlizr`:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center]  
录入gav等信息：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 1]  
然后`next`,springboot选择`2.2.10`版本，依赖选择`spring-web`:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 2]  
然后`next`\->`finish`,最终项目结构如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 3]

## 2：添加接口并测试 ##

### 2.1：创建HelloWorldController ###

@RestController
    public class HelloWorldController { 
    
        @RequestMapping("/hello")
        public String index() { 
            return "Greetings from Spring Boot !";
        }
    }

### 2.2：修改端口号 ###

默认端口号为8080，通过修改`application.properties`修改默认端口为`9876`:

server.port=9876

### 2.3：启动服务 ###

直接运行`SpringbootHelloworldApplication`:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 4]

### 2.4：访问服务 ###

![在这里插入图片描述][20201021102422628.png_pic_center]

## 3：测试用例测试 ##

@RunWith(SpringRunner.class)
    @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
    public class HelloControllerIT { 
        @LocalServerPort
        private int port;
        private URL base;
        @Autowired
        private TestRestTemplate template;
    
        @Before
        public void setup() throws Exception { 
            this.base = new URL("http://localhost:" + port + "/hello");
        }
    
        @Test
        public void getHello() throws Exception { 
            ResponseEntity<String> response = template.getForEntity(base.toString(), String.class);
            //assertThat(response.getBody(), equalTo("Greetings from Spring Boot!"));
            assertEquals(
                    "Expect <Greetings from Spring Boot!>",
                    "Greetings from Spring Boot !",
                    response.getBody()
            );
        }
    }

## 4：源码 ##

[这里][Link 1]，如无积分可评论联系我。

## 最后：都让开，我要喝瑞幸 ##

![在这里插入图片描述][20200828090303329.png_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/c8a046db8fb84c1497ff64efcad56728.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/f95594a5f2be4d82aade208306c927be.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221123/f7885fb76fec4b80b9818fce6a6f3d31.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/b573c0d7c53942889e80ce46fe754ac5.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dhbmcwOTA3_size_16_color_FFFFFF_t_70_pic_center 4]: /images/20221123/e095d4a033bb49e18a2ce35abf92f93e.png
[20201021102422628.png_pic_center]: /images/20221123/374c50b903744f779764ebd45105fd39.png
[Link 1]: https://download.csdn.net/download/wang0907/12994256
[20200828090303329.png_pic_center]: /images/20221123/942f7619b69d4b958d6f8541555cac1c.png