Java通用型讀取數據庫數據代碼

package untitled1.com.app;

import java.sql.*;

import java.util.*;

 

public class DBtest {

  private Connection conn;

  private PreparedStatement ps;

  private ResultSet rs;

  public DBtest() {

    try {

      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

      conn = DriverManager.getConnection("jdbc:odbc:test1","sa","sa");

    }

    catch (Exception ex) {

      ex.printStackTrace();

    }

  }

  

  public Vector getAllData(String sql){

    Vector vc = new Vector();

    Vector temp = null;

    try {

      ps = conn.prepareStatement(sql);

      rs = ps.executeQuery();

      ResultSetMetaData rsmd = rs.getMetaData();

      while (rs.next()) {

        temp = new Vector();

        for (int i = 0; i < rsmd.getColumnCount(); i++) {

          temp.add(rs.getObject(rsmd.getColumnName(i+1)));

        }

        vc.add(temp);

      }

 

       rs.close();

 

       ps.close();

 

       conn.close();

    }

    catch (Exception ex) {

      ex.printStackTrace();

    }

    

    return vc;

  }

 

  public static void main(String[] args) {

    DBtest dbtest = new DBtest();

    Vector vc = dbtest.getAllData("select * from authors"); //此爲SQL2000裏自帶的數據庫pubs裏的某個表

    for (int i = 0; i < vc.size(); i++) {

      System.out.println(vc.get(i).toString());

    }

  }

}