曲目字段增加默认返回值

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/entity/MusicSheet.java

@@ -7,6 +7,7 @@ import java.io.Serializable;
 import java.math.BigDecimal;
 import java.util.Date;
 import java.util.Objects;
+import java.util.Optional;
 
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
@@ -216,7 +217,7 @@ public class MusicSheet implements Serializable {
 	private Boolean delFlag;
 
 	public String getMusicImg() {
-		return musicImg;
+		return Optional.ofNullable(musicImg).orElse("");
 	}
 
 	public void setMusicImg(String musicImg) {
@@ -436,7 +437,7 @@ public class MusicSheet implements Serializable {
 	}
 
 	public String getAudioFileUrl() {
-		return audioFileUrl;
+		return Optional.ofNullable(audioFileUrl).orElse("");
 	}
 
 	public void setAudioFileUrl(String audioFileUrl) {