修改readme

README.md

@@ -30,12 +30,15 @@ spring.dubbo.module.default=false
 
 ### 2. 客户端介绍
 * 配置文件 `application.properties`
-```spring.dubbo.application.name=consumer
-      spring.dubbo.registry.address=zookeeper://localhost:2181
-      spring.dubbo.scan=com.zhiwei.demo.client
-      spring.dubbo.module.default=false ```
-   
+```
+spring.dubbo.application.name=consumer
+spring.dubbo.registry.address=zookeeper://localhost:2181
+spring.dubbo.scan=com.zhiwei.demo.client
+spring.dubbo.module.default=false 
 
+```
+   
+`spring.dubbo.scan`表示要扫描的`package`目录。
 
 * 启动入口 `com.zhiwei.demo.client.Client`
 ```