无法使用java连接sql server 2008 r2

Question

I am trying to connect sql server 2008 r2 with my java code , But it is showing me this error .

Exception in thread "main" com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host DINESH-PC, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
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(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Main.main(Main.java:13)

my code is:

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    String dbURL = "jdbc:sqlserver://localhost:1433;user=sa;password=123456";
    Connection conn = DriverManager.getConnection(dbURL);
    if (conn != null) {
        System.out.println("Connected");
    }

i am using jre7 and sqljdbc4-3.0.jar is included in library.

Help me with ur suggesstions.

Answer 1

You have quite a lot of information from exception message. Just follow the hints. Check if all connection string are right. Check if DB server run. Check if there is no firewall blocking that port on server where DB is situated.

also must check wheather tcp/ip is enabled ..

to check

• open sql server configration manager
• select sql server network configration
• then, select protocol for MSSQLSERVER
• them check wheather tcp/ip is enabled or not. If not enable it.