eclipse Java链接SQL server 驱动加载成功但数据库无法连接

Question

import java.sql.*;

public class Main {
public static void main(String [] args)
{
String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
String dbURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=jsp";
String userName="sa";
String userPwd="1234";
try
{
Class.forName(driverName);
System.out.println("加载驱动成功！");
}catch(Exception e){
e.printStackTrace();
System.out.println("加载驱动失败！");
}
try{
Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
System.out.println("连接数据库成功！");
}catch(Exception e)
{
e.printStackTrace();
System.out.print("SQL Server连接失败！");
}

}

}

网上给出的检测代码

Answer 1

https://blog.csdn.net/hadues/article/details/79188793