通过Java来备份与还原Mysql数据库的代码

import java.io.IOException;  import java.text.SimpleDateFormat;  import java.util.Date;    public class BackupMysql {   /** 访问MySQL数据库服务器所在的url */   private String serverUrl;   /** 访问MySQL数据库的用户名 */   private String username;   /** 访问MySQL数据库的密码 */   private String password;        public String getServerUrl() {    return serverUrl;   }     public void setServerUrl(String serverUrl) {    this.serverUrl = serverUrl;   }     public String getUsername() {    return username;   }     public void setUsername(String username) {    this.username = username;   }     public String getPassword() {    return password;   }     public void setPassword(String password) {    this.password = password;   }     public BackupMysql(String serverUrl,String username, String password) {    super();    this.serverUrl=serverUrl;    this.username = username;    this.password = password;   }     public String backup(String backupPath, String dbName) throws IOException {      String backupFile = backupPath+ dbName+ new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date()) + ".sql";      String mysql = "mysqldump "+"--host="+serverUrl+" --user=" + username + " --password="+ password + " --opt " + dbName + "> " + backupFile;      java.lang.Runtime.getRuntime().exec("cmd /c " + mysql);         System.out.println("备份成功!");        return backupFile;     }     public void restore(String restoreFile, String dbName) throws Exception {       String mysql = "mysql "+"-h"+serverUrl+" -u" + username + " -p"+ password + " " + dbName + " < " + restoreFile;              System.out.println(mysql);             java.lang.Runtime.getRuntime().exec("cmd /c " + mysql);        System.out.println("还原成功!");   }     /**    * @param args    */   public static void main(String[] args) {      String serverUrl="127.0.0.1";        String userName = "root";      String pwd = "root";      BackupMysql backup = new BackupMysql(serverUrl,userName, pwd);      try {     backup.restore("d:/nationz2010-12-20-14-16-47.sql", "nationz");    } catch (Exception e) {     e.printStackTrace();    }   }  }