规定时间删除本地文件

                         规定时间删除本地文件

/**
     * 删除指定文件夹中日期早于 (当前时间-beforetime)的文件
     * @param pathname String
     * @param beforetime long(秒)
     * @return int
     */

public static int  delFiles(String pathname,long beforetime)
    {
        File f = new File(pathname);
        File[] files = f.listFiles();
        long tobedeletetime = Calendar.getInstance().getTimeInMillis()-beforetime*1000;
        int delfilecount = 0;
        int temp;
        for(int i=0;i<files.length;i++)
        {
            if(files[i].lastModified()<tobedeletetime)
                temp = files[i].delete()?(delfilecount++):0;
        }
        return delfilecount;
    }