XML中非法字符的处理

XML中非法字符的处理

即XML的Tag中间的内容如果包含如下字符的话( & < > ' " )，需要分别替换为对应的(&amp; &lt; &gt; &apos; &quot;)，否则XML被解析时会报错。

1. 非法字符及替换

&amp; => The ampersand (&).
&lt; => The less than sign (<).
&gt; => The greater than sign (>).
&apos; => The single quote or apostrophe (').
&quot; => The double quote (").

2. Perl替换程序

sub ConvertEntity
{
my ( $origin ) = @_ ;
# &lt;=>Thelessthansign(<).
#&gt;=>Thegreaterthansign(>).
#&amp;=>Theampersand(&).
#&apos;=>Thesinglequoteorapostrophe(').
#&quot;=>Thedoublequote(").
$origin =~ s /&/& amp; / g;
$origin =~ s /</& lt; / g;
$origin =~ s />/& gt; / g;
$origin =~ s / ' /&apos;/g;
$origin=~s/"/&quot;/g;

return($origin);
}

$string=qq{<and>and&and'and"};
printConvertEntity($string);