jdbc批量导入数据

/**   * 设置数据库连接工具类   * 包括(连接、注册驱动、释放连接)   *    *
 */
public  final  class  DBUtils {
    private  static  String mysqlurl =  "jdbc:mysql://....../mytest" ;
    private  static  String accessurl =  "jdbc:mysql://...../mytest" ;
    private  static  String user =  "root" ;
    private  static  String password =  "root" ;

    // 获得连接
    public  static  Connection getAccessConn()  throws  SQLException {
        return  DriverManager.getConnection(accessurl, user, password);
    }

    public  static  Connection getMySqlConn()  throws  SQLException {
        return  DriverManager.getConnection(mysqlurl, user, password);
    }

    // 释放连接
    public  static  void  free(ResultSet rs, PreparedStatement ps, Connection conn) {
        try  {
            if  (rs !=  null ) {
                rs.close();
            }
        }  catch  (SQLException e) {
            e.printStackTrace();
        }  finally  {
            try  {
                if  (ps !=  null ) {
                    ps.close();
                }
            }  catch  (SQLException e) {
                e.printStackTrace();
            }  finally  {

                try  {
                    if  (conn !=  null ) {
                        conn.close();
                    }
                }  catch  (SQLException e) {
                    e.printStackTrace();
                }

            }

        }

    }

    // 加载驱动
    static  {
        try  {
            Class.forName( "com.mysql.jdbc.Driver" );
        }  catch  (ClassNotFoundException e) {
            System.out.println( "驱动加载出错" );
        }
    }
}

 

 

 

使用测试类

public  class  BatchExample {
    private  static  Connection mysqlConn =  null ;
    private  static  ResultSet rs =  null ;
    // 总条数
    private  static  int  allCount =  10000 ;
    // 分批条数
    private  static  int  preCount =  1000 ;
    // 计数器
    private  static  int  count =  0 ;

    private  static  String insertSQL =  "insert into users(firstname, lastname, age) values(?, ?, ?)" ;

    private  static  PreparedStatement mysqlPs =  null ;

    public  static  void  main(String[] args)  throws  SQLException {
        try  {
            mysqlConn = DBUtils.getMySqlConn();
            mysqlPs = mysqlConn.prepareStatement(insertSQL);
                       //执行操作不提交，最后通过手动进行提交事务
            mysqlConn.setAutoCommit( false );
            long  start = System.currentTimeMillis();

            for  ( int  i =  1 ; i <= allCount; i++) {
                mysqlPs.setString( 1 ,  "firstname"  + i);
                mysqlPs.setString( 2 ,  "lastname"  + i);
                mysqlPs.setInt( 3 ,  23 );
                              //先将数据暂存起来
                mysqlPs.addBatch();
                if  ((i % preCount) ==  0 ){
                                     //将暂存的数据进行批量执行
                    mysqlPs.executeBatch();
                    System.out.println( "当前进行完毕===>"  + (++count) * preCount +  "条" );
                }
            }
            long  end = System.currentTimeMillis();
            System.out.println( "数据导入完毕,所用时间为: "  + (end - start) +  " ms" );

        }  catch  (Exception e) {
            mysqlConn.rollback();
            System.out.println( "数据出错,已进行回滚" );
            throw  new  RuntimeException();
        }  finally  {
                       //进行事务提交
            mysqlConn.commit();
            DBUtils.free(rs, mysqlPs, mysqlConn);
        }
    }

}