Java和C#访问同一个数据库遇到的一些问题

搞了一上午，还是没有搞定，到处出错，郁闷了

我自己的工作机上转有DB2、MyEClipse、Visual Studio2010、Sql server2008

其中在MyEclipse用Java可以访问DB2，在Visual Studio2010上用C#可以访问Sql server2008

现在我有一个java程序和C#程序需要访问同一个数据库

可是问题出现了

我本来想让vs2010访问DB2，也在项目中引入了IBM.Data.DB2.dll的类库，可是在运行时却提示我“Error 3 The type or namespace name 'IBM' could not be found (are you missing a using directive or an assembly reference?) ”

代码如下：

 

 static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            //Application.EnableVisualStyles();
            //Application.SetCompatibleTextRenderingDefault(false);
            //Application.Run(new Main());
            GetDB2();
        }

        static void GetDB2()
        {
            DB2Connection conn = null;
            DB2Command cmd = null;
            DB2DataReader reader = null;
            conn = new DB2Connection("DATABASE=CSD;SERVER=10.60.30.85:50000;UID=DB2ADMIN;PWD=IBMDB2");
            try
            {
                conn.Open();
                cmd = new DB2Command("select * from TB_CANYOUNG", conn);
                reader = cmd.ExecuteReader();
                while (reader.Read())
                {
                    Console.WriteLine(reader.GetString(0) + "\t" + reader.GetString(1));
                }
            }
            catch (Exception)
            {

                throw;
            }
            finally
            {
                if (reader != null)
                    reader.Close();
                if (conn != null)
                    conn.Close();
            }
        }
    }

 

这个不行，我就想在java中访问Sql server2008，msbase.jar、mssqlserver.jar、msutil.jar以及sqljdbc.jar四个jar包都引入了，可还是提示我：

Error Trace in getConnection() : [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]无法打开登录所请求的数据库 "t_name"。登录失败。
Error: No active Connection

 Java代码如下：

 

package DBHelper;

import java.sql.*;
import java.io.*;
import java.*;
public class Connect{
     private java.sql.Connection  con = null;
     private final String url = "jdbc:microsoft:sqlserver://";
     private final String serverName= "127.0.0.1";
     private final String portNumber = "1433";
     private final String databaseName= "t_name";
     private final String userName = "sa";
     private final String password = "627525";
     // Informs the driver to use server a side-cursor, 
     // which permits more than one active statement 
     // on a connection.
     private final String selectMethod = "cursor"; 
     
     // Constructor
     public Connect(){}
     
     private String getConnectionUrl(){
          return url+serverName+":"+portNumber+";databaseName="+databaseName+";selectMethod="+selectMethod+";";
     }
     
     private java.sql.Connection getConnection(){
          try{
               Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver"); 
               con = java.sql.DriverManager.getConnection(getConnectionUrl(),userName,password);
               if(con!=null) System.out.println("Connection Successful!");
          }catch(Exception e){
               e.printStackTrace();
               System.out.println("Error Trace in getConnection() : " + e.getMessage());
         }
          return con;
      }
     /*
   
          Display the driver properties, database details 
     */ 
     public void displayDbProperties(){
          java.sql.DatabaseMetaData dm = null;
          java.sql.ResultSet rs = null;
 try{
               con= this.getConnection();
               if(con!=null){
                    dm = con.getMetaData();
                    System.out.println("Driver Information");
                    System.out.println("\tDriver Name: "+ dm.getDriverName());
                    System.out.println("\tDriver Version: "+ dm.getDriverVersion ());
                    System.out.println("\nDatabase Information ");
                    System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName());
                    System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion());
                    System.out.println("Avalilable Catalogs ");
                    rs = dm.getCatalogs();
                    while(rs.next()){
                         System.out.println("\tcatalog: "+ rs.getString(1));
                    } 
                    rs.close();
                    rs = null;
                    closeConnection();
               }else System.out.println("Error: No active Connection");
          }catch(Exception e){
               e.printStackTrace();
          }
     dm=null;
     }     
     
     private void closeConnection(){
          try{
               if(con!=null)
                    con.close();
               con=null;
          }catch(Exception e){
               e.printStackTrace();
          }
     }
     public static void main(String[] args) throws Exception
       {
          Connect myDbTest = new Connect();
          myDbTest.displayDbProperties();
       }
}

 

 

知道的朋友，希望不吝赐教！谢谢

 

 

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不过

如果这个问题在这里有人提供了很好的解决方案

我想对别人对自己都会有帮助

希望管理员不要删除了，拜托了