update md

weixin4j-mp/weixin4j-mp-server/README.md

@@ -41,7 +41,7 @@ weixin4j-mp-server
 
 2.mvn package,得到一个zip的压缩包,解压到启动目录(见`src/main/startup.sh/APP_HOME`)
 
-3.启动netty服务(`com.foxinmy.weixin4j.mp.startup.WeixinServiceBootstrap`)
+3.启动netty服务(`com.foxinmy.weixin4j.mp.startup.WeixinServerBootstrap`)
     
     sh startup.sh start
 	

weixin4j-mp/weixin4j-mp-server/src/main/java/com/foxinmy/weixin4j/mp/server/WeixinServerHandler.java

@@ -79,6 +79,11 @@ public class WeixinServerHandler extends
 		BaseResponse response = action.execute(xmlContent);
 		log.info("\n=================message out=================\n{}",
 				response);
+		if (response == null) {
+			HttpResponse httpResponse = HttpUtil
+					.createWeixinMessageResponse("");
+			ctx.write(httpResponse);
+		}
 		if (httpMessage.getEncryptType() == EncryptType.RAW) {
 			HttpResponse httpResponse = HttpUtil
 					.createWeixinMessageResponse(response.toXml());