连接数据库为什么出现这种异常？？？？？？？？？？？

[grant999]

java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Invalid operation for the current cursor position.
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseResultSet.validateCursorPosition(Unknown Source)
at com.microsoft.jdbc.base.BaseResultSet.getInt(Unknown Source)
at net.acai.database.DBConnect.main(DBConnect.java:187)
数据库中就一个表，表有两个字段，
ResultSet rs=conn.stmt.executeQuery("select * from class");

System.out.println(rs.getInt(1));
System.out.println(rs.getString(2));
}catch(Exception e){
e.printStackTrace();
}

[zhigangsun]

conn.stmt.executeQuery("select * from class");

你应该首先用connection.createStatement()来获取一个statement实例，然后调用statement实例的executequery方法

[grant999]

已经实例化了statement,stmt就是

[zuoyangguang]

那就直接用stmt就可以了，不用conn.stmt
ResultSet rs=stmt.executeQuery("select * from class");

System.out.println(rs.getInt(1));
System.out.println(rs.getString(2));
}catch(Exception e){
e.printStackTrace();
}

[zuoyangguang]

还有，rs没有调用next方法
ResultSet rs=stmt.executeQuery("select * from class");
rs.next();
System.out.println(rs.getInt(1));
System.out.println(rs.getString(2));
}catch(Exception e){
e.printStackTrace();
}

[zuoyangguang]

把你的代码完整的贴出来吧，我怕还有很多问题呢
你应该找一些相关的例子，不能自己摸索

[aywrenyue]

异常已经提示了。对游标的操作出现异常
楼主少了
rs.next();语句
当执行
ResultSet rs = stmt.executeQuery(sql);之后
rs指向第一条记录的前边

[qfll_1981]

同意zuoyangguang(水)

[zb_java]

同意zuoyangguang(水)