revert对api参数的修改，需要保持SDK的兼容

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

@@ -33,7 +33,7 @@ public class SubscriberChannelAction extends ChannelAction {
     public boolean action(Request request) {
         if (request.getNettyRequest() instanceof FullHttpRequest) {
             InputChannelSubscribe input = getRequestBody(request.getNettyRequest(), InputChannelSubscribe.class);
-            if (input != null && !StringUtil.isNullOrEmpty(input.getUserId())) {
+            if (input != null && !StringUtil.isNullOrEmpty(input.getTarget())) {
                 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);
@@ -41,7 +41,7 @@ public class SubscriberChannelAction extends ChannelAction {
                     return true;
                 }
                 WFCMessage.ListenChannel listenChannel = WFCMessage.ListenChannel.newBuilder().setChannelId(channelInfo.getTargetId()).setListen(input.getSubscribe()).build();
-                sendApiMessage(input.getUserId(), IMTopic.ChannelListenTopic, listenChannel.toByteArray(), result -> {
+                sendApiMessage(input.getTarget(), IMTopic.ChannelListenTopic, listenChannel.toByteArray(), result -> {
                     ByteBuf byteBuf = Unpooled.buffer();
                     byteBuf.writeBytes(result);
                     ErrorCode errorCode = ErrorCode.fromCode(byteBuf.readByte());

common/src/main/java/cn/wildfirechat/pojos/InputChannelSubscribe.java

@@ -9,15 +9,15 @@
 package cn.wildfirechat.pojos;
 
 public class InputChannelSubscribe {
-    private String userId;
+    private String target;
     private int subscribe; //1，订阅；0，取消订阅
 
-    public String getUserId() {
-        return userId;
+    public String getTarget() {
+        return target;
     }
 
-    public void setUserId(String userId) {
-        this.userId = userId;
+    public void setTarget(String target) {
+        this.target = target;
     }
 
     public int getSubscribe() {

sdk/src/main/java/cn/wildfirechat/sdk/ChannelServiceApi.java

@@ -55,10 +55,10 @@ public class ChannelServiceApi {
         return httpUtils.httpJsonPost(path, messageData, SendMessageResult.class);
     }
 
-    public IMResult<Void> subscribe(String target) throws Exception {
+    public IMResult<Void> subscribe(String userId) throws Exception {
         String path = APIPath.Channel_Subscribe;
         InputChannelSubscribe input = new InputChannelSubscribe();
-        input.setUserId(target);
+        input.setTarget(userId);
         input.setSubscribe(1);
         return httpUtils.httpJsonPost(path, input, Void.class);
     }
@@ -66,7 +66,7 @@ public class ChannelServiceApi {
     public IMResult<Void> unsubscribe(String userId) throws Exception {
         String path = APIPath.Channel_Subscribe;
         InputChannelSubscribe input = new InputChannelSubscribe();
-        input.setUserId(userId);
+        input.setTarget(userId);
         input.setSubscribe(0);
         return httpUtils.httpJsonPost(path, input, Void.class);
     }