判空

src/main/java/com/uas/platform/b2c/common/account/model/UsageLog.java

@@ -213,7 +213,7 @@ public class UsageLog extends BufferedLogable implements Serializable {
 	}
 
 	public String getUserName() {
-		if(user.getUserName()!=null){
+		if(user != null && user.getUserName() != null){
 			return user.getUserName().substring(0,1)+"**";
 		}
 		return null;