JAVA实现批处理

下面这个例子，是从tab分隔的csv文件里读取数据，把数据写入hostname上的DBNAME的USER_MASTER里。import java.io.*;import java.sql.*;import oracle.jdbc.*;public class Batch2 {private static String sDBConnect = "jdbc:oracle:thin:@hostname:1521:DBNAME";private static String sDBUser = "user";private static String sDBPassword = "password";private static String sPath = "C:Batch";private static String sFileName = "csvfile.txt";//file name divide by tprivate static int iMax=10000;//max countprivate static int iCol=4;//column numberpublic static void main(String[] args) { do_Batch_User_Master(); System.out.println("Over.");    }  public static void do_Batch_User_Master(){  String [][]values=new String[iMax][iCol];  int i=do_readfile(values);  do_Batch_User_Master(values,i);  }    public static int do_readfile(String [][]values){  int i = 0;  String value[];  try {          FileReader in = new FileReader(sPath+sFileName);          BufferedReader br = new BufferedReader(in);          String line;          while ((line = br.readLine()) != null) {              value = (line+"t0").split("t");              if (do_check_have(value,values,i)) continue;values[i] = value;              i++;          }          br.close();          in.close();      } catch (IOException e) {          System.out.println(e);      }return i;  }    public static boolean do_check_have(String []value,String [][]values,int icnt){  boolean bret = false;    for ( int i=0;i < icnt ;i++ )                  {  if(values[i][0].equals(value[0])){//double checked  bret = true;  break;  }  }    return bret;  }        public static void do_Batch_User_Master(String [][]values,int icnt){  Connection con = null;  PreparedStatement pstm = null;  Statementstm = null;    ResultSetrst = null;  StringBuffer sb =null;      try {      DriverManager.registerDriver(new oracle.jdbc.OracleDriver());      con = DriverManager.getConnection(sDBConnect,sDBUser,sDBPassword);      // disable autocommit       con.setAutoCommit(false);                    sb = new StringBuffer();      sb.append("INSERT INTO USER_MASTER (USER_ID,PASSWORD,NAME,DEL_FLG) ");      sb.append("VALUES (?,?,?,?)");      // PrepareStatement      pstm = con.prepareStatement( sb.toString());           for( int i=0;i