JAVA连接MSSQL2005的出错与解决（附代码）

在 SQL Server 2005 里面，如果出现到主机  的 TCP/IP 连接失败。 java.net.ConnectException: Connection refused: connect!

    估计是因为sqlserver2005默认情况下是禁用了tcp/ip连接。

    您可以在命令行输入：telnet localhost 1433进行检查，这时会报错：正在连接到localhost...不能打开到主机的连接，在端口 1433: 连接失败    启动tcp/ip连接的方法：

    打开 /Microsoft SQL Server 2005/配置工具/目录下的SQL Server Configuration Manager，选择mssqlserver协议, 然后右边窗口有个tcp/ip协议，然后启动它，把sqlserver服务停了，然后在启动。问题就解决了！    这时在命令行输入：telnet localhost 1433就不会再报错了，窗口显示为一片黑，即为正常。

 

代码：

//=====================================================================

//

//  File:    connectURL.java     

//  Summary: This Microsoft SQL Server 2005 JDBC Driver sample application

//      demonstrates how to connect to a SQL Server database by using

//      a connection URL. It also demonstrates how to retrieve data

//      from a SQL Server database by using an SQL statement.

//  Date:    April 2006

//

//---------------------------------------------------------------------

//

//  This file is part of the Microsoft SQL Server JDBC Driver Code Samples.

//  Copyright (C) Microsoft Corporation.  All rights reserved.

//

//  This source code is intended only as a supplement to Microsoft

//  Development Tools and/or on-line documentation.  See these other

//  materials for detailed information regarding Microsoft code samples.

//

//  THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF

//  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO

//  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A

//  PARTICULAR PURPOSE.

//

//=====================================================================

package mssql;

4000
import java.sql.*;

public class connectURL {

 public static void main(String[] args) {

  

  // Create a variable for the connection string.

  String connectionUrl = "jdbc:sqlserver://localhost:2044;" +  //主机名和加端口号，默认是1433.

   "user=nono;password=nono123";       //用户名和密码。。。应该不用说了吧

  // Declare the JDBC objects.

  Connection con = null;

  Statement stmt = null;

  ResultSet rs = null;

  

         try {

          // Establish the connection.

          Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

              con = DriverManager.getConnection(connectionUrl);

           

              // Create and execute an SQL statement that returns some data.

              String SQL = "select * from test";

              stmt = con.createStatement();

              rs = stmt.executeQuery(SQL);

           

              // Iterate through the data in the result set and display it.

              while (rs.next()) {

               System.out.println(rs.getString(1));

               //System.out.println(rs.getString(4) + " " + rs.getString(6));

              }

         }

       

  // Handle any errors that may have occurred.

  catch (Exception e) {

   e.printStackTrace();

  }

  finally {

   if (rs != null) try { rs.close(); } catch(Exception e) {}

       if (stmt != null) try { stmt.close(); } catch(Exception e) {}

       if (con != null) try { con.close(); } catch(Exception e) {}

  }

 }

}