replace(param1,param2,param3)

param1 正則表達式；param2 將匹配的字符替換成指定字符；param3 模式

param3參數如下

模式解釋：

i: Case insensitive: 忽略大小寫

f: First only. That is, replace/find/etc. only the first occurrence of something.

r: The substring to find is a regular exPRession.標準正則表達式（http://docs.Oracle.com/javase/7/docs/api/java/util/regex/Pattern.html）

m: Multi-line mode for regular expressions. In multi-line mode the expressions ^ and $ match just after or just before, respectively, a line terminator or the end of the string. By default these expressions only match at the beginning and the end of the entire string. Note that ^ and $ doesn't match the line-break character itself.

s: Enables dot-all mode for regular expressions (same as Perl singe-line mode). In dot-all mode, the expression . matches any character, including a line terminator. By default this expression does not match line terminators.

c: Permits whitespace and comments in regular expressions.在正則表達式中允許空格和注釋。

范例如下：

<#assign s = 'foo bAr baar'>${s?replace('ba', 'XY')}i: ${s?replace('ba', 'XY', 'i')}if: ${s?replace('ba', 'XY', 'if')}r: ${s?replace('ba*', 'XY', 'r')}ri: ${s?replace('ba*', 'XY', 'ri')}rif: ${s?replace('ba*', 'XY', 'rif')}  

輸出結果：

foo bAr XYari: foo XYr XYarif: foo XYr baarr: foo XYAr XYrri: foo XYr XYrrif: foo XYr baar 

更多范例：

原文：str = 2積分兌換30元優惠券${str?replace('//b//d+積分','','r')} 輸出：兌換30元優惠券

更多信息可以參考：

http://freemarker.org/docs/ref_builtins_string.html#ref_builtin_replace