Merge pull request #1427 from chuntaojun/feat_config_prefix

[FEATURE] @NacosConfigurationProperties support prefix setting

api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java

@@ -36,6 +36,13 @@ import static com.alibaba.nacos.api.common.Constants.DEFAULT_GROUP;
 @Documented
 public @interface NacosConfigurationProperties {
 
+    /**
+     * config prefix name
+     *
+     * @return default value is <code>""</code>
+     */
+    String prefix() default "";
+
     /**
      * Nacos Group ID
      *
@@ -51,9 +58,9 @@ public @interface NacosConfigurationProperties {
     String dataId();
 
     /**
-     * if the config style is yaml
+     * config style
      *
-     * @return default value is <code>false</code>
+     * @return default value is {@link ConfigType#PROPERTIES}
      */
     ConfigType type() default ConfigType.PROPERTIES;