通过telnet连接外部数据库

发布于 2024-11-28 22:25:43 字数 1548 浏览 1 评论 0原文

我有一个连接到 MS SQL 数据库的 java 程序。该程序在通过 eclipse 运行时完美工作，但是当我通过 AIX 运行它时出现错误：

java.sql.SQLException：网络错误 IOException：远程主机拒绝尝试连接操作。

我可以成功 ping 服务器，但无法 telnet 到服务器。我也无法从 Windows 桌面远程登录。

我正在使用 jtds 进行连接：

String connectionString = "jdbc:jtds:sqlserver://"+dropez_ip_address+"/"+dropez_db_name;
ResultSet rs = null;
Statement stmt = null;

try{

    Class.forName("net.sourceforge.jtds.jdbc.Driver");
    Connection conn = DriverManager.getConnection(connectionString, dropez_db_username, dropez_db_password);

    stmt = conn.createStatement();
}catch(Exception e){}

这是 jTDS 中有关该问题的一些文档，但我仍然无法解决该问题。

Why do I get java.sql.SQLException: "Network error IOException: Connection refused: connect" when trying to get a connection?

The "Connection refused" exception is thrown by jTDS when it is unable to connect to the server. There may be a number of reasons why this could happen:

    - The server name is misspelled or the port number is incorrect.
    - SQL Server is not configured to use TCP/IP. Either enable TCP/IP from SQL Server's Network Utility app or have jTDS connect via named pipes (see the URL format for information on how to do this).
    - There is a firewall blocking port 1433 on the server.

To check whether TCP/IP is enabled and the port is not blocked you can use "telnet 1433". Until telnet doesn't connect, jTDS won't either. If you can't figure out why, ask your network administrator for help.

原文

I have a java program that connects to a MS SQL database. The program works perfectly when running through eclipse however I get an error when I run it through AIX:

java.sql.SQLException: Network error IOException: A remote host refused an attempted connect operation.

I can successfully ping the server but am not able to telnet into the server. I am also not able to telnet from my windows desktop.

I am using jtds to connect:

String connectionString = "jdbc:jtds:sqlserver://"+dropez_ip_address+"/"+dropez_db_name;
ResultSet rs = null;
Statement stmt = null;

try{

    Class.forName("net.sourceforge.jtds.jdbc.Driver");
    Connection conn = DriverManager.getConnection(connectionString, dropez_db_username, dropez_db_password);

    stmt = conn.createStatement();
}catch(Exception e){}

Here is some documentation from jTDS regarding the issue, but I am still not able to resolve the issue.

Why do I get java.sql.SQLException: "Network error IOException: Connection refused: connect" when trying to get a connection?

The "Connection refused" exception is thrown by jTDS when it is unable to connect to the server. There may be a number of reasons why this could happen:

    - The server name is misspelled or the port number is incorrect.
    - SQL Server is not configured to use TCP/IP. Either enable TCP/IP from SQL Server's Network Utility app or have jTDS connect via named pipes (see the URL format for information on how to do this).
    - There is a firewall blocking port 1433 on the server.

To check whether TCP/IP is enabled and the port is not blocked you can use "telnet 1433". Until telnet doesn't connect, jTDS won't either. If you can't figure out why, ask your network administrator for help.

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