fix:公告

cooleshow-cms/src/main/java/com/yonge/cooleshow/cms/dal/entity/HelpCenterContent.java

@@ -17,7 +17,7 @@ public class HelpCenterContent {
 
 	@ApiModelProperty(value = "内容", required = true)
 	@NotBlank(message = "正文不能为空")
-	private String content = "";
+	private String content;
 
 	@ApiModelProperty("发布时间")
 	private Date releaseTime;