解决乱码问题

broker/src/main/java/com/xiaoleilu/loServer/action/Action.java

@@ -22,6 +22,8 @@ import io.netty.handler.codec.http.HttpRequest;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import cn.wildfirechat.common.ErrorCode;
 
+import java.nio.charset.StandardCharsets;
+
 import static cn.wildfirechat.common.ErrorCode.ERROR_CODE_SUCCESS;
 
 /**
@@ -84,7 +86,7 @@ abstract public class Action {
         if (request instanceof FullHttpRequest) {
             FullHttpRequest fullHttpRequest = (FullHttpRequest) request;
             byte[] bytes = Utils.readBytesAndRewind(fullHttpRequest.content());
-            String content = new String(bytes);
+            String content = new String(bytes, StandardCharsets.UTF_8);//contribute by JiaRG from github
             Gson gson = new Gson();
             T t = gson.fromJson(content, cls);
             return t;