mySQL语法不起作用

Question

使用try-catch短语我在以下代码中捕获错误：

ResultSet rs = stmt.executeQuery("select * from 'user_tbl' where user_id = '"+user+"' ");

错误详情如下：

com.mysql.jdbc.exceptions.jdbc4.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 ''user_tbl' where user_id = '12345678'' at line 1

我的语法有什么问题吗？我使用Netbeans作为我的IDE。

Answer 1

你不应该在里面有user_tbl＆＃39;标记，尝试删除它们，使其显示为：

ResultSet rs = stmt.executeQuery( "select * from user_tbl where user_id = '"+user+"' ");

Answer 2

不需要单引号，请尝试：

ResultSet rs = stmt.executeQuery("select * from user_tbl where user_id = " + user);

_{如果user_id是非整数，则将user变量括在单引号中}