JAVA ODBC 连接SQLSERVER2008

package mypackage;
import java.sql.*;
public class DB {
String sDBDriver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";

//String sConnStr = "jdbc:sqlserver://PC--20110331FNJ:1433;databaseName=productShowSys;integratedSecurity=true;";
String sConnStr = "jdbc:odbc:mydb";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
public DB() {
try {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//Class.forName(sDBDriver);
} catch (java.lang.ClassNotFoundException e) {
e.printStackTrace();
}
}
public ResultSet executeQuery(String sql) {
rs = null;
try {
conn = DriverManager.getConnection(sConnStr);
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
} catch (SQLException ex) {
ex.printStackTrace();
}
return rs;
}
public void executeUpdate(String sql) {
rs = null;
try {
conn = DriverManager.getConnection(sConnStr);
stmt = conn.createStatement();
stmt.executeUpdate(sql);
} catch (SQLException ex) {
ex.printStackTrace();
}
}
public void close() {
try {
if (stmt != null) {
stmt.close();
stmt = null;
}
if (conn != null) {
conn.close();
}
} catch (Exception e) {
System.err.println("??��????????????????????: " + e.getMessage());
}
}
}