add broad cast message

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

@@ -264,6 +264,14 @@ public class Main {
         }
 
 
+        IMResult<BroadMessageResult> resultBroadcastMessage = MessageAdmin.broadcastMessage("user1", 0, payload);
+        if (resultBroadcastMessage != null && resultBroadcastMessage.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+            System.out.println("broad message success, send message to " + resultBroadcastMessage.getResult().getCount() + " users");
+        } else {
+            System.out.println("broad message failure");
+            System.exit(-1);
+        }
+
 
         //初始化机器人API
         RobotHttpUtils.init("http://localhost:18080", "robot1", "123456");

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

@@ -22,4 +22,13 @@ public class MessageAdmin {
         messageData.setMessageUid(messageUid);
         return AdminHttpUtils.httpJsonPost(path, messageData, Void.class);
     }
+
+    public static IMResult<BroadMessageResult> broadcastMessage(String sender, int line, MessagePayload payload) throws Exception {
+        String path = APIPath.Msg_Broadcast;
+        BroadMessageData messageData = new BroadMessageData();
+        messageData.setSender(sender);
+        messageData.setLine(line);
+        messageData.setPayload(payload);
+        return AdminHttpUtils.httpJsonPost(path, messageData, BroadMessageResult.class);
+    }
 }