spring注解导入配置文件

@Configuration
@ImportResource("classpath:config.xml")
public class StoreConfig {

    @Value("${jdbc.url}")
    private String url;

    @Value("${jdbc.username}")
    private String username;

    @Value("${jdbc.password}")
    private String password;

    @Bean
    public MyDriverManager myDriverManager(){
        return new MyDriverManager(url,username,password);
    }
}

　　@Value 不需要get、set方法

ConfigurationProperties 注解，是需要的，他能帮你自动将配置文件的对应的  prefix开头的属性，注入。

@ConfigurationProperties(locations = "classpath:mail.properties",
                         ignoreUnknownFields = false,
                         prefix = "mail")
public class MailProperties {
  public static class Smtp {
    private boolean auth;
    private boolean starttlsEnable;
    // ... getters and setters
  }
  @NotBlank private String host;
  private int port;
  private String from;
  private String username;
  private String password;
  @NotNull private Smtp smtp;
  // ... getters and setters
}

　　

mail.host=localhost
mail.port=25
mail.smtp.auth=false
mail.smtp.starttls-enable=false
mail.from=me@localhost
mail.username=
mail.password=