springboot read profile

1. 配置文件application.yml

str: hello

datasource:
  driver: driver
  url: url
  username: username
  password: password

2. 读取配置文件

@Component
public class ProfileDemo {
    // 读取配置文件一个数据
    @Value("${str}")
    private String str;
    // 读取配置文件全部数据
    @Autowired
    private Environment env;

    public void run(){
        System.out.println(this.str);
        System.out.println(this.env.getProperty("str"));
    }
}

// 组件读取配置文件一块数据
@Component
@ConfigurationProperties(prefix = "datasource")
public class DataSource{
    private String driver;
    private String url;
    private String username;
    private String password;

    public void setDriver(String driver) {
        this.driver = driver;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "db{" +
                "driver='" + driver + ''' +
                ", url='" + url + ''' +
                ", username='" + username + ''' +
                ", password='" + password + ''' +
                '}';
    }
}

3. 使用数据

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		ConfigurableApplicationContext cac = SpringApplication.run(DemoApplication.class, args);
		ProfileDemo pd = cac.getBean(ProfileDemo.class);
		DataSource db = cac.getBean(DataSource.class);
		pd.run();
		System.out.println( db );
	}

4. 输出结果