如何使用 AES_ENCRYPT 在 MySQL 中编写更新查询?
问题描述：
这是我在用户想要更改密码时编写的代码.
This is my code that I wrote when user wants to change his password.
s2.executeUpdate("UPDATE user SET AES_ENCRYPT(password='"+newpw1+"','key') WHERE uid='"+pubvar.uid+"')");
但它不起作用，有人可以帮我纠正并发布吗?谢谢.
But it doesn't work, can someone correct it for me and post it? Thanks.
答
你的意思是，
UPDATE user
SET password = AES_ENCRYPT('" + newpw1 + "','key')
WHERE uid = '" + pubvar.uid + "')
最好使用PreparedStatement来防止SQL注入.
String _upd = "UPDATE user SET password = AES_ENCRYPT(?,'key') WHERE uid = ?)";
PreparedStatement pstmt = con.prepareStatement(_upd);
pstmt.setString(1, newpw1);
pstmt.setString(2, pubvar.uid);
pstmt.executeUpdate();