从Spring boot主类读取application.properties值

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.stereotype.Component;

@SpringBootApplication
@EnableConfigurationProperties(AppProperties.class)
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

@Component
@ConfigurationProperties(prefix = "app")
class AppProperties {
    private String name;
    private String version;

    // Getters and setters

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class MyComponent {
    private final AppProperties appProperties;

    @Autowired
    public MyComponent(AppProperties appProperties) {
        this.appProperties = appProperties;
    }

    public void doSomething() {
        String appName = appProperties.getName();
        String appVersion = appProperties.getVersion();

        // 使用配置文件中的值进行操作
    }
}