Function HTMLEncode(Str) If Isnull(Str) Then HTMLEncode = "" Exit Function End If Str = Replace(Str,Chr(0),"", 1, -1, 1) Str = Replace(Str, """", """, 1, -1, 1) Str = Replace(Str,"<",&quo
在用户名或者密码框中输入“11‘ or ’1‘ = '1”时,生成的sql语句将为“selec * from userInfo where name = '11' or '1' = '1' and pwd = '11' or '1' = '1'”:该语句永远为真.为了防止sql语句的注入,提高程序的安全性.需要替换危险字符. Java代码段: public class Checkstr {public String dostring(String str){ str=str.replac