Java 批量插入数据（Oracle）

//批量添加20000条数据用时8秒。
try {
   String url = "jdbc:oracle:thin:@IP:1521:orcl"; // orcl为数据库的SID
   String user = "oracle";
   String password = "oracle";
   StringBuffer sql = new StringBuffer();
   sql.append("insert into ex_log (EX_LOG_ID,EX_LOG_DATE) values (?,?)");
   Class.forName("oracle.jdbc.driver.OracleDriver");
   Connection con = (Connection) DriverManager.getConnection(url,user,password);
   // 关闭事务自动提交
   con.setAutoCommit(false);

   Long startTime = System.currentTimeMillis();
   PreparedStatement pst = (PreparedStatement) con.prepareStatement(sql.toString());
   for (int i = 0; i < list.size(); i++) {
    ExLog exLog = (ExLog)list.get(i);
    pst.setString(1, exLog.getExLogId());
    pst.setString(2, exLog.getExLogDate());
    // 把一个SQL命令加入命令列表
    pst.addBatch();
   }
   // 执行批量更新
   pst.executeBatch();
   // 语句执行完毕，提交本事务
   con.commit();
   Long endTime = System.currentTimeMillis();
   System.out.println("用时：" + (endTime - startTime));
   pst.close();
   con.close();
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (SQLException e) {
   e.printStackTrace();
  }