我是用JDBC连接SQL2000的，可是总有错误，请大家帮忙啊！

我的程序是：
package neutaobao;
import java.sql.*;
//获得数据库连接对象，实现对连接的单独操作
public class DbConnectionManager {
private String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
private String url = "jdbc:microsoft:sqlserver://localhost:8080;DatabaseName=neutaobao";
private String user = "";
private String passWorld = "";

public void setDriverName(String driverName){
this.driverName = driverName;
}
public String getDriverName(){
return driverName;
}
public void setUrl(String url){
this.url = url;
}
public String getUrl(){
return url;
}
public void setUser(String user){
this.user = user;
}
public String getUser(){
return user;
}
public void setPassWorld(String passWorld){
this.passWorld = passWorld;
}
public String getPassWorld(){
return passWorld;