gson单例化，另外关掉gson html转义功能

broker/src/main/java/com/xiaoleilu/loServer/action/channel/ApplicationGetUserInfoAction.java

@@ -52,7 +52,7 @@ public class ApplicationGetUserInfoAction extends ChannelAction {
             }
 
             response.setStatus(HttpResponseStatus.OK);
-            response.setContent(new Gson().toJson(result));
+            response.setContent(gson.toJson(result));
         }
         return true;
     }

broker/src/main/java/com/xiaoleilu/loServer/action/channel/ChannelAction.java

@@ -101,7 +101,7 @@ abstract public class ChannelAction extends Action {
         }
 
         RestResult result = RestResult.resultOf(errorCode, errorCode.getMsg(), data);
-        response.setContent(new Gson().toJson(result));
+        response.setContent(gson.toJson(result));
         response.send();
     }
 
@@ -110,7 +110,7 @@ abstract public class ChannelAction extends Action {
             FullHttpRequest fullHttpRequest = (FullHttpRequest) request;
             byte[] bytes = Utils.readBytesAndRewind(fullHttpRequest.content());
             String content = new String(bytes, StandardCharsets.UTF_8);
-            Gson gson = new Gson();
+            
             T t = gson.fromJson(content, cls);
             return t;
         }

broker/src/main/java/com/xiaoleilu/loServer/action/channel/SubscriberChannelAction.java

@@ -38,7 +38,7 @@ public class SubscriberChannelAction extends ChannelAction {
                 if(input.getSubscribe() > 0 && (channelInfo.getStatus() & ProtoConstants.ChannelState.Channel_State_Mask_Active_Subscribe) == 0) {
                     response.setStatus(HttpResponseStatus.OK);
                     RestResult result = RestResult.resultOf(ErrorCode.ERROR_CODE_NOT_RIGHT);
-                    response.setContent(new Gson().toJson(result));
+                    response.setContent(gson.toJson(result));
                     return true;
                 }
                 WFCMessage.ListenChannel listenChannel = WFCMessage.ListenChannel.newBuilder().setChannelId(channelInfo.getTargetId()).setListen(input.getSubscribe()).build();