Question

我写了一些代码，它应该从我的SQL服务器中提取信息，以告知当前正在运行的项目。代码在我的Windows机器上运行正常，但我打算在运行Raspbian Jessie的覆盆子pi上运行它。当我运行代码时，它给了我错误

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host H79SQLMERINSQL, port 1433 has failed. Error: "null. 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.".

当我在我的Windows机器上运行我的代码时，它运行完全正常，并给我项目编号

以下是代码：

   public void main(String []args) {  

      // address of the SQL Server
      String connectionUrl = "jdbc:sqlserver://H79SQLMERINSQL:1433;" +  
         "databaseName=runtime;user=sa;password=sa;";
      //ErrorDialog errors = new ErrorDialog();

      // Declaration of variables

      //JDBC objects 
      Connection conURL = null;  
      Statement statement = null;  
      ResultSet receivedStatement = null;

      //Variables for calling
      String itemNumber = null;   

      //The following code is where all of the SQL Server connections happen and the setting of variables for use later
      try {  
         // Establish the connection.  
         Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");  
         conURL = DriverManager.getConnection(connectionUrl);  
         System.out.println("Not Prblem");
         // Create and execute an SQL statement that returns some data.  
         statement = conURL.createStatement();  
         receivedStatement = statement.executeQuery("SELECT Value "
         + "FROM v_StringLive "
         + "WHERE v_StringLive.TagName IN ('MD_ProcessData.ItemNumberMD1')");  

         // Iterate through the data in the result set and display it.  
         while (receivedStatement.next()) {  
            itemNumber = receivedStatement.getString(1);
            //Below code is for displaying to the system
            /*System.out.println("The item number is: "+receivedStatement.getString(2) + " " + receivedStatement.getString(6));*/
         }  
      }  

      // Handle any errors that may have occurred.  
      catch (Exception e) {
         System.out.println("Error 101: Connection to SQL Server has timed out");
         e.printStackTrace();  
      }
      finally {  
         if (receivedStatement != null) try { receivedStatement.close(); } catch(Exception e) {}  
         if (statement != null) try { statement.close(); } catch(Exception e) {}  
         if (conURL != null) try { conURL.close(); } catch(Exception e) {}  
      }  
      System.out.println("Item: " + itemNumber);
   }

我确保在我的SQL Server配置管理器中，我的IP地址全部设置为TCP端口1433，并且TCP动态端口设置为空白。

我花了很多时间试图弄清楚这一点没有成功，非常感谢任何帮助。谢谢大家

无法在Raspbian上使用JDBC从SQL Server获取数据（Works on Windows但不在Raspbian Jessie上）

0 个答案: