好象你BEAN里有几个地方是错误的!
这段:
 public void setConstring(String str)
        {constring="jdbc:odbc:"+str;
        
         }
   
改成这样吧?
 public void setConstring(String str)
        {constring="jdbc:odbc:'"+str+"'";
        
         }
   
还有就是这段:
public ResultSet executeUpdate(String sql)
                {rs=null;
                try{com=DriverManager.getConnection(constring);
                Statement stmt=com.createStatement();
                rs=stmt.executeQuery(sql);//这里有错误吧?!!
                 }
                 catch(SQLException e)
                 {System.err.print(e.getErrorCode());
                 }
                 return rs;
                
                 }