The reasons for the error are as follows:

Exception in thread "main" org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:99)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473)
at vo.NewsManager.main(NewsManager.java:17)
    Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Connect to the host via port 1433 localhost Of TCP/IP Connection failed. error:"Connection refused: connect. Verify the connection properties and check SQL Server Instances are running on the host and accepted on this port TCP/IP Connect, and make sure that the firewall does not block access to this port TCP Connect.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1033)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:817)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:700)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:842)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)

On the command line, enter telnet localhost 1433, which cannot be connected:

Check Configuration: Peripheral Application Configurator for Services and Connections

"Use TCP/IP and named pipes(B)" has been selected.

Next, check the SQL Server Configuration Manager

TCP/IP under the instance name "SQLEXPRESS" has been started:

Right-click "TCP/IP" to select "Properties" (or double-click "TCP/IP") and select the "IP Address" tab, with "IPALL" at the bottom:

Here's the problem: I haven't set up a TCP port. After that, the following figure is shown:

Look at the "SQL Native Client Configuration":

Double-click "TCP/IP":

Everything is right. Now restart the service:

Right-click "SQL Server (SQLEXPRESS)" and select Restart.

Go back to the command line and type: telnet localhost 1433

Display black screen, as shown above, shows that it has been successful! ____________

Finally, the JDBC connection under Eclipse can be correctly connected to SQL Server 2005.