Spring Boot 环境变量读取 和 属性对象的绑定

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
 
@SpringBootApplication
public class Application {
 
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
 
    @Bean
    @ConfigurationProperties(prefix = "myapp")
    public MyAppProperties myAppProperties() {
        return new MyAppProperties();
    }
}
 
@ConfigurationProperties(prefix = "myapp")
class MyAppProperties {
    private String name;
    private int version;
 
    // standard getters and setters
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getVersion() {
        return version;
    }
 
    public void setVersion(int version) {
        this.version = version;
    }
}

在这个简化的代码示例中，我们定义了一个Spring Boot应用程序的入口点，并通过@Bean注解和@ConfigurationProperties注解将一个属性对象绑定到Spring的上下文中。MyAppProperties类包含了应用程序特有的配置属性，它们可以通过application.properties或application.yml文件进行配置。这种方式使得配置管理变得更加集中和易于维护。