今下午一连遇到了俩错误, 都是比较低级的
只能说是基础不到家, 唉。。。。。。。。。。
ResultSet rs = pstmt.executeQuery(psql); 运行【完】这的时候 会抛出一个异常:
com.mysql.jdbc.exceptions.MySQLSyntaxErrorException:
You have an error in your SQL syntax;
check the manual that corresponds to your MySQL server version for the
right syntax to use near '?' at line 1
============================================
在解决问题的时候 一直围绕着 “参数”-- ? --求解,但是。。。。
没有留意executeQuery () 的用法
executeQuery 一个是不带参数的, 另一个是带参数的:
二者之间的区别
executeQuery()是 pstmt 中的方法
而
executeQuery(sql) 是继承自stmt中的方法
=============================================
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