JDBC 连Sql Server 接数据库--The TCP/IP connection to the host localhost, port 1433 has failed

原文：https://blog.csdn.net/qq_39241986/article/details/80848855

这样的错误，你有遇到过吗？

The TCP/IP connection to the host localhost, port 1433 has failed.

JDBC 连Sql Server 接数据库--The TCP/IP connection to the host localhost, port 1433 has failed-LMLPHP

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.".

解决方法：

1.选中此电脑–>右键管理–>计算机管理–>服务和应用程序
   (1)先查看 sql server 服务是否已经开启
到–>SQL Server 配置管理器–>SQL Server 服务，确保本地Sql Server 服务已经开启。
JDBC 连Sql Server 接数据库--The TCP/IP connection to the host localhost, port 1433 has failed-LMLPHP
   (2)再查看 sql server 网络配置
到–>SQL Server 配置管理器–>SQL Server 网络配置，确保Named Pipes和TCP/IP 协议为已启用状态。

2.我们再次运行程序，可能会出现还是连接不成功的现象，继续解决问题：
   还是看 sql server 网络配置
到–>SQL Server 配置管理器–>SQL Server 网络配置，Named Pipes和TCP/IP 协议为已启用状态，选中TCP/IP右键–>属性–>IP地址，往下拉滚动条，查看IPALL中TCP端口是否为1433，不是，则改为1433。
JDBC 连Sql Server 接数据库--The TCP/IP connection to the host localhost, port 1433 has failed-LMLPHP
最后，重启SQL Server服务，然后再运行程序，成功，舒服啦！