一种jdbc-odbc桥连接Access的方法, 在xp系统下不需连接驱动（jar文件）

package util;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;

class Simpleselect {

public static void main (String args[]) {

// String url = "jdbc:odbc:my-dsn";
String file_name="src/util/my-dsn.mdb";
String url="jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ="+file_name+";PWD=123"; //如果没有密码：PSD=123则可以省去;

String query = "SELECT * FROM emp";

try {

// Load the jdbc-odbc bridge driver

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

// Attempt to connect to a driver. Each one
// of the registered drivers will be loaded until
// one is found that can process this URL

Connection con = DriverManager.getConnection (
url, "", "");

// If we were unable to connect, an exception
// would have been thrown. So, if we get here,
// we are successfully connected to the URL

// Check for, and display and warnings generated
// by the connect.

checkForWarning (con.getWarnings ());

// Get the DatabaseMetaData object and display
// some information about the connection

DatabaseMetaData dma = con.getMetaData ();

System.out.println("/nConnected to " + dma.getURL());
System.out.println("Driver " +
dma.getDriverName());
System.out.println("Version " +
dma.getDriverVersion());
System.out.println("");

// Create a Statement object so we can submit
// SQL statements to the driver

Statement stmt = con.createStatement ();

// Submit a query, creating a ResultSet object

ResultSet rs = stmt.executeQuery (query);

// Display all columns and rows from the result set

dispResultSet (rs);

// Close the result set

rs.close();

// Close the statement

stmt.close();

// Close the connection

con.close();
}
catch (SQLException ex) {

// A SQLException was generated. Catch it and
// display the error information. Note that there
// could be multiple error objects chained
// together

System.out.println ("/n*** SQLException caught ***/n");

while (ex != null) {
System.out.println ("SQLState: " +
ex.getSQLState ());
System.out.println ("Message: " +
ex.getMessage ());
System.out.println ("Vendor: " +
ex.getErrorCode ());
ex = ex.getNextException ();
System.out.println ("");
}
}
catch (java.lang.Exception ex) {

// Got some other type of exception. Dump it.

ex.printStackTrace ();
}
}

//-------------------------------------------------------------------
// checkForWarning
// Checks for and displays warnings. Returns true if a warning
// existed
//-------------------------------------------------------------------

private static boolean checkForWarning (SQLWarning warn)
throws SQLException
{
boolean rc = false;

// If a SQLWarning object was given, display the
// warning messages. Note that there could be
// multiple warnings chained together

if (warn != null) {
System.out.println ("/n *** Warning ***/n");
rc = true;
while (warn != null) {
System.out.println ("SQLState: " +
warn.getSQLState ());
System.out.println ("Message: " +
warn.getMessage ());
System.out.println ("Vendor: " +
warn.getErrorCode ());
System.out.println ("");
warn = warn.getNextWarning ();
}
}
return rc;
}

//-------------------------------------------------------------------
// dispResultSet
// Displays all columns and rows in the given result set
//-------------------------------------------------------------------

private static void dispResultSet (ResultSet rs)
throws SQLException
{
int i;

// Get the ResultSetMetaData. This will be used for
// the column headings

ResultSetMetaData rsmd = rs.getMetaData ();

// Get the number of columns in the result set

int numCols = rsmd.getColumnCount ();

// Display column headings

for (i=1; i<=numCols; i++) {
if (i > 1) System.out.print(",");
System.out.print(rsmd.getColumnLabel(i));
}
System.out.println("");

// Display data, fetching until end of the result set

while (rs.next ()) {

// Loop through each column, getting the
// column data and displaying

for (i=1; i<=numCols; i++) {
if (i > 1) System.out.print(",");
System.out.print(rs.getString(i));
}
System.out.println("");

// Fetch the next result set row

}
}
}