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

Have you ever encountered such an error?

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

   
   
    
    
     
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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.".
   
   
    
    

   
   
    
    
     
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Solution:

1. Select This Computer –> Right-click Management –> Computer Management –> Services and Applications
   (1) First check sql serverwhether the service has been started
Go to –>SQL Server Configuration Manager –>SQL Server Service to ensure that the local Sql Serverservice has been started.
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   (2) Check sql serverthe network configuration again
and go to –> SQL Server Configuration Manager –> SQL Server Network Configuration to ensure Named Pipesthat TCP/IPthe protocol is enabled.

2. We run the program again, and the connection may still fail. Continue to solve the problem: still
   see sql serverthe network configuration
to –> SQL Server Configuration Manager –> SQL Server Network Configuration, Named Pipesand TCP/IPthe protocol is enabled, select TCP/IPthe right button – >Properties–>IP Address, scroll down and check IPALLwhether TCP端口it is 1433. If not, change it to 1433 1433.
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Finally, restart SQL Serverthe service and then run the program again. It is successful and comfortable!

What I use is: jdk1.7
(corresponding resources will be posted tomorrow)
database driver jar package and jdk1.7 download

Have you ever encountered such an error?

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

   
   
  
  
   
   1

Write picture description here

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.".
   
   
  
  

   
   
  
  
   
   1
   
   2
   
   3
   
   4
   
   5

Solution:

What I use is: jdk1.7
(corresponding resources will be posted tomorrow)
database driver jar package and jdk1.7 download