java如何设置SQL server连接URL？

Question

我在连接我在电脑中为一个小应用程序创建的SQL Server数据库时遇到问题。服务器名为'INSPIRONN5110-D'。我使用Windows身份验证登录到服务器。已从microsoft下载驱动程序并将其内容复制到program files文件夹，并将路径（C:\program files\microsoft JDBC driver 4.0 for SQL Server\sqljdbc_4.0\chs\sqljdbc4.jar）添加到path和classpath变量（不确定要使用哪一个）中，但仍会出现此错误

Creating Connection.
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host INSPIRONN5110-D, port 1433 has failed. Error: "connect timed out. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    .....

下面是我尝试连接到数据库的方法

private Connection connectToDB() {

        String connectionUrl = "jdbc:sqlserver://INSPIRONN5110-D; databaseName=MemoryHelp;";
        Connection con = null;
        try{
//          Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            System.out.println("Creating Connection.");
            con = DriverManager.getConnection(connectionUrl);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
//      } catch (ClassNotFoundException e) {
//          // TODO Auto-generated catch block
//          e.printStackTrace();
        } finally{

            System.out.println("Connection created.");

        }


        return con;
    }

已尝试将连接url更改为“jdbc:sqlserver://localhost; databaseName=MemoryHelp；"

现在获取此错误：

Creating Connection.
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    ....

终于解决了。必须转到SQL Server Configuration Manager并启用到服务器的tcp/ip连接，然后复制sqljdbc_身份验证。从驱动程序文件夹到system32文件夹的dll文件，并使用以下连接URL可以使其工作：

String connectionUrl = "jdbc:sqlserver://localhost;databaseName=MemoryHelp;integratedSecurity=true";

Answer 1

您没有提供服务器的ip或主机名，也没有提供端口。为了连接到服务器，您需要提供这些

在您的情况下，如果服务器与应用程序位于同一台计算机上。。那么应该是： jdbc：sqlserver://localhost:3306

端口3306只是我假设您正在使用的默认端口，这取决于您托管服务器的w.e端口