java将秒转换为时分秒工具类

需要一个接收时分秒的对象，如下：

 package com.dq.schoolcontract.utils;

 import com.sun.media.jfxmedia.control.VideoRenderControl;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.*;

 /**
  * @Author Allen.Lv
  * @Description //TODO
  * @Date 16:43 2019/2/27
  * @Desc: Coding Happy!
  **/
 @Getter
 @Setter
 @ToString
 @AllArgsConstructor
 @NoArgsConstructor
 @ApiModel(value = "视频时长")
 public class VideoDuration {

     /**
      * 视频时长秒
      */
     @ApiModelProperty(value = "秒")
     private Integer second;

     /**
      * 视频时长分
      */
     @ApiModelProperty("分")
     private Integer minute;

     /**
      * 视频时长时
      */
     @ApiModelProperty(value = "时")
     private Integer hour;

 }

下面为转换工具类：

 package com.dq.schooldomain.utils;

 import com.dq.schoolcontract.utils.VideoDuration;

 /**
  * @Author Allen.Lv
  * @Description //TODO
  * @Date 19:43 2019/2/28
  * @Desc: Coding Happy!
  **/
 public class SecToTime {

     public static VideoDuration secToTime(int time) {
         String timeStr = null;
         int hour = 0;
         int minute = 0;
         int second = 0;
         if (time <= 0)
             return new VideoDuration(0, 0, 0);
         else {
             minute = time / 60;
             if (minute < 60) {
                 second = time % 60;
                 timeStr = unitFormat(minute) + ":" + unitFormat(second);
             } else {
                 hour = minute / 60;
                 if (hour > 99)
                     return new VideoDuration(59, 59, 99);
                 minute = minute % 60;
                 second = time - hour * 3600 - minute * 60;
                 timeStr = unitFormat(hour) + ":" + unitFormat(minute) + ":" + unitFormat(second);
             }
         }
         return new VideoDuration(Integer.parseInt(unitFormat(second)), Integer.parseInt(unitFormat(minute)), Integer.parseInt(unitFormat(hour)));
     }

     private static String unitFormat(int i) {
         String retStr = null;
         if (i >= 0 && i < 10)
             retStr = "0" + i;
         else
             retStr = "" + i;
         return retStr;
     }
 }