Spring常用注解与接口

# 读取配置信息

读取配置文件application.yml：

port: 9527
library:
	books:
	- name: a
	  description: aa
	- name: b
	  description: bb

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@value
```
@Value("${port}")
String port;
```
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@ConfigurationProperties

读取配置信息并于 bean 绑定

// java.home=
@ConfigurationProperties(prefix = "java")
public class Bean{
    private String name;
    ...
}

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# 前后端传值

获取参数

@PathVariable：获取路径参数

@RequestParam：获取查询参数

//请求的 url 是：/{123456}/teachers?type=web
@GetMapping("/klasses/{klassId}/teachers")
public List<Teacher> getKlassRelatedTeachers(
@PathVariable("klassId") Long klassId,
@RequestParam(value = "type", required = false) String type){
    ...
}

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传输数据

请求体中 Content-Type 为 application/json

@PostMapping("/register")
public Response registerController(@RequestBody @Valid User user){
    registerService.save(user);
    return Response.ok();
}

public class User{
    @NotBlank
    private String userName;
    @NotBlank
    private String password;
}

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发送 json数据：

{
    "userName":"rui",
    "password":"123456"
}

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# 注解

# @Import

https://juejin.cn/post/7327137518821736458

# 接口

# ImportBeanDefinitionRegistrar

https://juejin.cn/post/7180731318123118653?searchId=202402282252196299625B65A0D09B886B

# DeferredImportSelector

https://juejin.cn/post/7327138554756464692?searchId=20240228230745DB6AB2EEC09EFAA1B090

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