帮忙看个简单代码
package   GetLogin;

import   java.io.*;
import   java.sql.*;
import   java.util.*;

public   class   GoLogin  
{  
public   String   GoToLogin(String   ID,String   PASS)  
{
    Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ").newInstance();      
    String   url= "jdbc:microsoft:sqlserver://10.4.234.87:1433;DatabaseName=DCMSMOD ";  
    String   user= "sa ";  
    String   password= "518518 ";        
    Connection   conn=   DriverManager.getConnection(url,user,password);        
    Statement   stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);  
    String   SQL   =   "   SELECT   *   FROM   DCMSMOD..DSCMA     Where   MA001=   '   "   +   ID   +   " ' "   +     "   and   MA003=   ' "   +   PASS   +   " ' ";
    ResultSet   rs=stmt.executeQuery(SQL);  

    rs.first();
    if   (rs.getString( "MA001 ")   ==   " ")  
        return   "Login_ok ";
    else
        return   "Login_error ";      
       
}  


}

可报错呀，麻烦大家看看！

------解决方案--------------------
把错误帖出来啊，而且你那个RS没有循环，光在头上了
------解决方案--------------------
动态加载类，获取数据库连接等操作很容易发生异常，系统规定必须要为这些操作捕捉异常：


修改后的代码如下：

import java.io.*;
import java.sql.*;
import java.util.*;


public class GoToLogin
{
public String GoToLogin(String ID, String PASS)
{
try
{
Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ").
newInstance();
String url =
"jdbc:microsoft:sqlserver://10.4.234.87:1433;DatabaseName=DCMSMOD ";
String user = "sa ";
String password = "518518 ";
Connection conn = DriverManager.getConnection(url, user, password);
Statement stmt = conn.createStatement(ResultSet.
TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
String SQL = " SELECT * FROM DCMSMOD..DSCMA Where MA001= ' " + ID +
" ' " + " and MA003= ' " + PASS + " ' ";
ResultSet rs = stmt.executeQuery(SQL);

rs.first();
if (rs.getString( "MA001 ") == " ")
{
return "Login_ok ";
}
else
{
return "Login_error ";
}
}
catch (Exception e)
{return null;}
}
}

我现在没分了，快给分吧！