利用dos 命令执行 sql

// 数据库导出
                String user = "root"; // 数据库帐号
                String password = "xxx"; // 登陆密码
                String database = "xxx"; // 需要备份的数据库名
                String times= DateUtils.getSpecifyDate(new Date(),"yyyy-MM-dd_HHmmss");
                String oldtimes = DateUtils.getSpecifyDate(DateUtils.getPreviousOrNextDaysOfDate(new Date(), -3),"yyyy-MM-dd");
                String filepath = "e:\\xxx\\"+times+".sql"; // 备份的路径地址
                String stmt1 = "E:\\Program Files\\MariaDB 10.1\\bin\\mysqldump " + database    +" -h 192.168.3.120 -u " + user + " -p" + password + " --result-file=" + filepath;
                ArrayList<String> imgsrc=new ArrayList<String>();
                getAllFileName("e:\\xxx",imgsrc);
                imgsrc.parallelStream().forEach(name ->{
                    if(name.split("_")[0].equals(oldtimes)){
                        DeleteFileUtil.delete("e:\\xxx\\"+name);   // 删除文件  备份文件保留三天
                    }
                });
                try {
                    Runtime.getRuntime().exec(stmt1);
                    System.out.println("数据已导出到文件" + filepath + "中");
                }
                catch (IOException e) {
                    e.printStackTrace();
                }



// 获取所有文件名
    public static void getAllFileName(String path, ArrayList<String> fileName) {
        File file = new File(path);
        String[] names = file.list();
        if (names != null)
            fileName.addAll(Arrays.asList(names));

    }

利用jdk 自带timer 实现定时任务

         Timer timer = new Timer();
        TimerTask t1 = sqlbackup();
        timer.schedule(t1, 0, 3600000);