用windows身份访问sql2005为什么会出现异常？怎么解决

try{            PrintWriter pw = res.getWriter();            //访问数据库进行读取数据            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");            String dbURL = "jdbc:sqlserver://127.0.0.1:1433;integratedSecurity=true;DatabaseName=zeng";             ct = DriverManager.getConnection(dbURL);            ps = ct.prepareStatement("select * from memberMag;");            rs = ps.executeQuery();            while(rs.next()){                pw.println("ID:" + rs.getInt(1));                pw.println("userName:" + rs.getString(2));                pw.println("password:" + rs.getString(3));                pw.println("mail:" + rs.getString(4));                pw.println("userLevel:" + rs.getString(5));                pw.println("<br>");                pw.println("<hr>");            }        }catch(Exception ee){            ee.printStackTrace();        }finally{            try{                rs.close();                ps.close();                ct.close();            }catch(Exception ee){                ee.printStackTrace();            }        }