如何通过注解读取springboot yml配置

要通过注解读取Spring Boot的YML配置，请按照以下步骤操作：

首先，确保已经在项目中引入了Spring Boot和YAML相关的依赖。在pom.xml文件中添加以下依赖：

   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-mail</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-security</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-validation</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-websocket</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-actuator</artifactId>
</dependency><dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-devtools</artifactId>
   <optional>true</optional>
</dependency><dependency>
   <groupId>org.yaml</groupId>
   <artifactId>snakeyaml</artifactId>
</dependency>

在src/main/resources目录下创建一个名为application.yml或application.properties的配置文件，并添加需要的配置信息。例如：

app:
  name: MyApplication
  version: 1.0.0

创建一个Java类，用于存储配置信息。使用@Configuration和@ConfigurationProperties注解标记这个类。例如：

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConfigurationProperties(prefix = "app")
public class AppConfig {
    private String name;
    private String version;

    // Getters and setters
}

在需要使用配置信息的地方，使用@Autowired注解将AppConfig类注入到相应的类中。例如：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {
    @Autowired
    private AppConfig appConfig;

    @GetMapping("/config")
    public String getConfig() {
        return "Name: " + appConfig.getName() + ", Version: " + appConfig.getVersion();
    }
}

现在，当你访问/config端点时，将会看到从YML配置文件中读取的配置信息。

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