java代码备份mysql数据库

@echo off
set "date_string=%date:~0,4%-%date:~5,2%-%date:~8,2%"
set "time_string=%time:~0,2%-%time:~3,2%-%time:~6,2%"  
echo "==========开始备份数据库============"
set back_path=c:\xym\xymsql
if not exist %back_path% md %back_path%
set database=xym  
set username=root  
set password=root  
set mysql=C:\"Program Files"\MySQL\"MySQL Server 5.5"\bin\mysqldump.exe  
set "file_string=%back_path%\data_%date_string%-%time_string%"
set "filepath=%file_string%-xym.sql" 
echo %filepath%
%mysql% -u%username% -p%password% xym > "%filepath%"
echo "==========数据库备份成功============" 

package com.sm;

import java.io.IOException;

public class CmdMain {
    public static void Backup() {

        // 执行批处理文件
        String strcmd = "cmd.exe /c start c:\\xym\\xymsql\\sqldum.bat";
        // String strcmd1 = "cmd.exe /c start c:\\test.bat";
        Runtime rt = Runtime.getRuntime();
        Process ps = null;
        try {
            ps = rt.exec(strcmd);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        try {
            ps.waitFor();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        int i = ps.exitValue();
        if (i == 0) {
            System.out.println("执行完成.");
        } else {
            System.out.println("执行失败.");
        }
        ps.destroy();
        ps = null;

        // 批处理执行完后，根据cmd.exe进程名称
        // kill掉cmd窗口
        new CmdMain().killProcess();

    }

    public void killProcess() {
        Runtime rt = Runtime.getRuntime();
        Process p = null;
        try {
            rt.exec("cmd.exe /C start wmic process where name=‘cmd.exe‘ call terminate");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}