java 实现 mysql 备份数据库

try {
            
            String backupDir = null;
            StringBuilder buf = null;
            File file;
            backupDir = RuoYiConfig.getBackupDir();
            if(SystemUtils.IS_OS_WINDOWS){
                buf = new StringBuilder("mysqldump -q ");
            }else {
                File file1 = new File("/usr/bin/mysqldump");
                File file2 = new File("/usr/local/mysql/bin/mysqldump");
                if (file1.exists()) {
                    buf = new StringBuilder("/usr/bin/mysqldump -q ");
                } else if (file2.exists()) {
                    buf = new StringBuilder("/usr/local/mysql/bin/mysqldump -q ");
                } else {
                    throw new IllegalStateException("cannot find mysqldump");
                }
            }
            file = new File(backupDir);
            if (!file.exists()) {
                boolean fileStatus = file.mkdir();
                if(!fileStatus){
                    throw new GlobalException("数据库备份目录创建失败");
                }
            }
            DataSourceDTO dataSourceDTO = getGameDb(serverId,"1");//获取数据库信息
            buf.append("-u ").append(dataSourceDTO.getUsername());
            buf.append(" -h ").append(dataSourceDTO.getHost());
//        buf.append(" -p").append(dataSourceDTO.getPassword());
            buf.append(" -P ").append(dataSourceDTO.getPort());
            buf.append(" --opt ").append(dataSourceDTO.getPoolName());
            buf.append(" > ").append(backupDir).append(File.separator);
            String backupDbFileName = String.valueOf(serverId) + "_" + dataSourceDTO.getPoolName() + "_" + DateUtil.today()+ ".sql";
            buf.append(backupDbFileName);
            String cmd = buf.toString();
            ArrayList<String> envList = new ArrayList<>();
            Map<String,String> map = System.getenv();
            Set<Map.Entry<String,String>> entries = map.entrySet();
            for (Map.Entry<String, String> entry : entries) {
                envList.add(entry.getKey() + "=" + entry.getValue());
            }
            envList.add("MYSQL_PWD=" + dataSourceDTO.getPassword());
            String[] envs = envList.toArray(new String[0]);
            Process p = null;
            if (SystemUtils.IS_OS_WINDOWS) {
                p = Runtime.getRuntime().exec(new String[] { "cmd", "/c", cmd }, envs);
            } else {
                p = Runtime.getRuntime().exec(new String[] { "sh", "-c", cmd }, envs);
            }

            int result = p.waitFor();

            BufferedReader stdInput = new BufferedReader(new
                    InputStreamReader(p.getInputStream()));

            System.out.print(p.getOutputStream());
            if (result != 0) {
                String msg = "backup  game server " + serverId + " FAIL, code=" + result;
                throw new IllegalStateException(msg);
            }
            String backupFileName = backupDir + File.separator + backupDbFileName;
            File backupFile = new File(backupFileName);
            if (!backupFile.exists()) {
                String msg = "backup  game server " + serverId + " FAIL, cannot find backup file " + backupDbFileName;
                throw new IllegalStateException(msg);
            }
        }catch (Exception exception){
            throw new GlobalException(exception.getMessage());
        }