springboot获取配置文件的值

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

@Component
public class MyComponent {

    @Value("${my.property}")
    private String myProperty;

    public void printProperty() {
        System.out.println(myProperty);
    }
}

my.property=someValue

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "my")
public class MyProperties {

    private String property;

    // Getter and Setter
    public String getProperty() {
        return property;
    }

    public void setProperty(String property) {
        this.property = property;
    }
}

my.property=someValue

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

@Service
public class MyService {

    private final MyProperties myProperties;

    @Autowired
    public MyService(MyProperties myProperties) {
        this.myProperties = myProperties;
    }

    public void printProperty() {
        System.out.println(myProperties.getProperty());
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;

@Component
public class MyComponent {

    private final Environment env;

    @Autowired
    public MyComponent(Environment env) {
        this.env = env;
    }

    public void printProperty() {
        System.out.println(env.getProperty("my.property"));
    }
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

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

@Configuration
@EnableConfigurationProperties(MyProperties.class)
public class AppConfig {
}