用给新手的数据库连接代码

这个代码是好久以前的了,连接数据库算比较好的 代码很简单我就不多介绍了

package aptime;
import java.sql.*;

public class aptime {
  String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
  String sConnStr = "jdbc:odbc:aptime";
  private Connection conn = null;
  private Statement stmt = null;
  ResultSet rs = null;

  public aptime() {
    try {
      Class.forName(sDBDriver);
    }
    catch(java.lang.ClassNotFoundException e) {
      System.err.println("aptime(): " + e.getMessage());
    }
  }
  public ResultSet executeQuery(String sql) {
    rs = null;
    try {
    conn = DriverManager.getConnection(sConnStr);
    stmt = conn.createStatement();
    rs = stmt.executeQuery(sql);
    }
    catch(SQLException ex) {
      System.err.println("aq.executeQuery: " + ex.getMessage());
    }
    return rs;
  }
  public void executeUpdate(String sql) {
    stmt = null;
    rs=null;
    try {
    conn = DriverManager.getConnection(sConnStr);
    stmt = conn.createStatement();
    stmt.executeUpdate(sql);
    stmt.close();
    conn.close();
    }
    catch(SQLException ex) {
      System.err.println("aq.executeQuery: " + ex.getMessage());
    }
  }

  public void closeStmt(){
    try{
      stmt.close();
     }
    catch(SQLException e){
      e.printStackTrace();
     }
  }
  public void closeConn(){
    try{
      conn.close();
     }
    catch(SQLException e){
      e.printStackTrace();
     }
  }
}