fix: 系统消息多终端下bug

im-server/src/main/java/com/bx/imserver/netty/processor/SystemMessageProcessor.java

@@ -26,10 +26,11 @@ public class SystemMessageProcessor extends AbstractMessageProcessor<IMRecvInfo>
 
     @Override
     public void process(IMRecvInfo recvInfo) {
-        IMUserInfo receiver = recvInfo.getReceivers().get(0);
-        log.info("接收到系统消息,接收者:{}，内容:{}",  receiver.getId(), recvInfo.getData());
+        log.info("接收到系统消息,接收用户数量:{}，内容:{}",  recvInfo.getReceivers().size(), recvInfo.getData());
+        for (IMUserInfo receiver : recvInfo.getReceivers()) {
             try {
-            ChannelHandlerContext channelCtx = UserChannelCtxMap.getChannelCtx(receiver.getId(), receiver.getTerminal());
+                ChannelHandlerContext channelCtx =
+                    UserChannelCtxMap.getChannelCtx(receiver.getId(), receiver.getTerminal());
                 if (!Objects.isNull(channelCtx)) {
                     // 推送消息到用户
                     IMSendInfo<Object> sendInfo = new IMSendInfo<>();
@@ -48,6 +49,7 @@ public class SystemMessageProcessor extends AbstractMessageProcessor<IMRecvInfo>
                 sendResult(recvInfo, IMSendCode.UNKONW_ERROR);
                 log.error("发送异常，,接收者:{}，内容:{}", receiver.getId(), recvInfo.getData(), e);
             }
+        }
 
     }