获取和设置文件或目录的修改时间

import java.io.File;
/*
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*/


public class Main {

  public void m() throws Exception {

    File file = new File("filename");

    // Get the last modified time

    long modifiedTime = file.lastModified();

    // 0L is returned if the file does not exist


    // Set the last modified time

    long newModifiedTime = System.currentTimeMillis();

    boolean success = file.setLastModified(newModifiedTime);

    if (!success) {

      // operation failed.

    }

  }

}