如何在spring boot中从系统属性中获取值

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

@Component
public class SystemPropertyExample {

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

    public String getMyProperty() {
        return myProperty;
    }
}

java -Dmy.property=value -jar your-application.jar

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

@Component
public class SystemPropertyExample {

    @Autowired
    private Environment env;

    public String getMyProperty() {
        return env.getProperty("my.property");
    }
}

java -Dmy.property=value -jar your-application.jar

import org.springframework.stereotype.Component;

@Component
public class SystemPropertyExample {

    public String getMyProperty() {
        return System.getProperty("my.property");
    }
}

my.property=value

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