fix

code/sapparent/sapservice/src/main/java/org/fouram/job/MessageSchedule.java

@@ -21,6 +21,9 @@ public class MessageSchedule {
 	public void taskBiz() {
 		try {
 			List<SapMessageUser> messageUsers = sapMessageUserService.selectList();
+			if (messageUsers.isEmpty()) {
+				return;
+			}
 			List<SapUser> sapUsers = sapUserService.selectNotSendEntryMessageList();
 			StringBuffer messageContent = null;
 			for (SapUser sapUser : sapUsers) {