MyEclipse连接数据库出有关问题了（no suitable driver）

package com.xiao7.sql;import java.sql.Connection;import java.sql.DatabaseMetaData;import java.sql.DriverManager;import java.sql.ResultSet;public class MsStandardConToSSCode {    private Connection con = null;    private final String url = "jdbc:sqlserver://";    private final String serverName = "127.0.0.1";    private final String portNumber = "1433";    private final String databaseName = "wuhen";    private final String userName = "sa";    private final String password = "xiao7520";    // Informs the driver to use server a side-cursor,    // which permits more than one active statement    // on a connection.    // private final String selectMethod = "cursor";    // Constructor    public MsStandardConToSSCode() {    }    private String getConnectionUrl() {        return url + serverName + ":" + portNumber + ";databasename=" + databaseName;    }    private java.sql.Connection getConnection() {        try {            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");            con = DriverManager.getConnection(getConnectionUrl(), userName, password);            if (con != null){                System.out.println("Connection Successful!");            }        } catch (Exception e) {            e.printStackTrace();            System.out.println("Error Trace in getConnection() : " + e.getMessage());        }        return con;    }    /*     * Display the driver properties, database details     */    public void displayDbProperties() {        DatabaseMetaData dm = null;        ResultSet rs = null;        try {            con = this.getConnection();            if (con != null) {                dm = con.getMetaData();                System.out.println("Driver Information");                System.out.println("\tDriver Name: " + dm.getDriverName());                System.out.println("\tDriver Version: " + dm.getDriverVersion());                System.out.println("\nDatabase Information ");                System.out.println("\tDatabase Name: " + dm.getDatabaseProductName());                System.out.println("\tDatabase Version: " + dm.getDatabaseProductVersion());                System.out.println("Avalilable Catalogs ");                rs = dm.getCatalogs();                while (rs.next()) {                    System.out.println("\tcatalog: " + rs.getString(1));                }                rs.close();                rs = null;                closeConnection();            } else                System.out.println("Error: No active Connection");        } catch (Exception e) {            e.printStackTrace();        }        dm = null;    }    private void closeConnection() {        try {            if (con != null)                con.close();            con = null;        } catch (Exception e) {            e.printStackTrace();        }    }    public static void main(String[] args) throws Exception {        MsStandardConToSSCode myDbTest = new MsStandardConToSSCode();        myDbTest.displayDbProperties();    }}