spring:

     dataresource:

         druid:

             driver-class-name: com.mysql.jdbc.Driver

             url: jdbc:mysql://127.0.0.1:3306/appcloud?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC

             username: root

             password: root    

 @Component

 @PropertySource("classpath:application-dev.yml")//制定读取配置文件的路径

 @ConfigurationProperties(prefix = "spring.datasource.druid")//指定读取的前缀

 public class ConfigYml {

 　　

     @Value("${driver-class-name}")//配置文件中的命名为driver-class-name;java中不能命名不能有下划线。所以可以使用@Value注解获取值

     private String driver;

     private String url;

     private String username;

     private String password;

     @Override

     public String toString() {

         return "ConfigYml{" +

                 "driver='" + driver + '\'' +

                 ", url='" + url + '\'' +

                 ", username='" + username + '\'' +

                 ", password='" + password + '\'' +

                 '}';

     }

     public String getDriver() {

         return driver;

     }

     public void setDriver(String driver) {

         this.driver = driver;

     }

     public String getUrl() {

         return url;

     }

     public void setUrl(String url) {

         this.url = url;

     }

     public String getUsername() {

         return username;

     }

     public void setUsername(String username) {

         this.username = username;

     }

     public String getPassword() {

         return password;

     }

     public void setPassword(String password) {

         this.password = password;

     }

 }

 @Autowired

 private ConfigYml configYml;