perf：调整消息发送接口和方法

springboot-message/src/main/java/com/tiesheng/message/pojos/UserChannel.java

@@ -0,0 +1,32 @@
+package com.tiesheng.message.pojos;
+
+public class UserChannel {
+
+    private String user;
+    private String channel;
+
+    public UserChannel(String user, String channel) {
+        this.user = user;
+        this.channel = channel;
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // setter\getter
+    ///////////////////////////////////////////////////////////////////////////
+
+    public String getUser() {
+        return user;
+    }
+
+    public void setUser(String user) {
+        this.user = user;
+    }
+
+    public String getChannel() {
+        return channel;
+    }
+
+    public void setChannel(String channel) {
+        this.channel = channel;
+    }
+}