我有一个基于用户输入的数据库查询, 但是如果用户输入搜索中的任何一封共同字母, 应用程序会崩溃。 但是由于搜索支持中文字符, 我无法简单地屏蔽所有字符搜索 。
我该如何写一个正则表达式来检查一个单一的英语字符, 但不会包含一个中国字符? “ {( a- zA- Z){ 1}$ ” 。 “ {w{ 1}$ ” 是否只包括英文字母?
我想用这种通常的表达方式, 但任何更好的解决办法都会受到欢迎:
if(input.matches("^(a-zA-Z){1}$")
{
//Show error
}
else
{
//do query
}
您应该先确定任何崩溃。 要区分英文和中文字符( CJK), 您可以对 ASCII 和 CJK 字符使用字符类, 如 p{ ASCII} /code > 、 p{ Alpha}/code > 和 p{ InCJK UnizedIdegraphics} /code > 。
$db_user="root"; $db_host="localhost"; $db_password="root"; $db_name = "fayer"; $conn = mysqli_connect($db_host,$db_user,$db_password,$db_name) or die ("couldn t connect to server"); // perform query ...
I am in the early stages of developing a database-driven system and the largest part of the system revolves around an inheritance type of relationship. There is a parent entity with about 10 columns ...
I m writing a Java web app in my free time to learn more about development. I m using the Stripes framework and eventually intend to use hibernate and MySQL For the moment, whilst creating the pages ...
Does anybody know if it is possible to move some (not all) users from one ASP.NET membership database to another? (for the purposes of migrating some users to another database on another machine, but ...
Is it because of size? By the way, what is the limit of the size?
I am trying to join two tables that reside in two different databases. Every time, I try to join I get the following error: An association from the table xxx refers to an unmapped class. If the ...
For example, I have a table, and there is a column named Tags . I want to know if value programming exists in this column. How can I do this in ADO.NET? I did this: OleDbCommand cmd = new ...
I m trying to migrate one of my PHP projects to Doctrine. I ve never used it before so there are a few things I don t understand. In my current code, I have a class similar to this: class ...