JDBC 連接失敗,錯誤:到主機的 TCP/IP 連接失敗 - JDBC connection failed, error: TCP/IP connection to host failed


I want to connect Java class file with SQL server 2012. I have logged in with SQL server authentication, but I am receiving an error when connecting.我想將 Java 類文件與 SQL Server 2012 連接。我已使用 SQL Server 身份驗證登錄,但在連接時收到錯誤消息。


The TCP/IP connection to the host, port 1433 has failed.與主機、端口 1433 的 TCP/IP 連接失敗。 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.".錯誤:“連接被拒絕:連接。驗證連接屬性。確保 SQL Server 實例正在主機上運行並在端口接受 TCP/IP 連接。確保到端口的 TCP 連接未被防火牆阻止.”。

My code:我的代碼:

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");  //1. Register your driver
//2. get the connection object
//Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost;databaseName=aysha","sa","admin");
Connection con = DriverManager.getConnection("jdbc:sqlserver://;databaseName=aysha","user=sa","password=admin");
 //"jdbc:sqlserver://; Instance=SQL2008;" +       "databaseName=MB;user=sa;password=123;";
//Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=aysha","sa" , "password");
//3. Prepare a statement
Statement stmt = con.createStatement();
//4. Write the query`
String sql = "Select * from employee";
//5. Execute the statement and 
ResultSet rs = stmt.executeQuery(sql);
//6. Process the result set

while (rs.next())


參考: https://stackoom.com/en/question/1H3b6
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