import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.util.Date;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import com.ioif.util.Configer;
import com.ioif.util.Logger;

/**
 * 清理临时文件
 * 
 * @author lch
 * @date 2021年8月11日
 */
@Component
public class ClearTempFilesTask {

   //临时文件保存时间30天
   private final Long SAVE_TIME = 1000 * 60 * 60 * 24 * 30L;

   /**
    * 每天执行一次
    */
   @Scheduled(cron = "0 0 0 * * ?")
   public void runTask() {
      Logger.getLogger().info(this.getClass().getName() + ":runTask()");
      try {
         //临时文件目录
         String filePath = Configer.getInstance().getProperty("temp_file_write");
         delFiles(filePath);
      } catch (Exception e) {
         Logger.getLogger().error(e.getMessage());
         e.printStackTrace();
      }
   }

   private void delFiles(String filePath) {
      Long now=new Date().getTime();
      File directory = new File(filePath);
      if (directory.exists()) {
         String[] fileList = directory.list();
         File tmpFile = null;
         for (int i = 0; i < fileList.length; i++) {
            tmpFile = new File(directory.getAbsolutePath(), fileList[i]);
            if (tmpFile.isDirectory()) {
               delFiles(tmpFile.getPath());
               if(new File(directory.getAbsolutePath(), fileList[i]).list().length<1){
                  new File(directory.getAbsolutePath(), fileList[i]).delete();
               }
            } else if (tmpFile.isFile()) {
               try {
                  BasicFileAttributes bAttributes= Files.readAttributes(tmpFile.toPath(),BasicFileAttributes.class);
                  FileTime ct = bAttributes.lastModifiedTime();
                  if(now-ct.toMillis()>SAVE_TIME)
                     tmpFile.delete();
               } catch (IOException e) {
                  e.printStackTrace();
               }
            }
         }
      }
   }

   public static void main(String[] args) {
      ClearTempFilesTask task = new ClearTempFilesTask();
      task.runTask();
   }

}

定时清理文件及文件夹