replace(param1,param2,param3) param1 正则表达式；param2 将匹配的字符替换成指定字符；param3 模式 param3 参数如下

模式	i	r	m	s	c	f
replace	支持	支持	只和r 组合	只和r 组合	只和r 组合	支持

[b] 模式解释：[/b] i: Case insensitive: 忽略大小写 f: First only. That is, replace/find/etc. only the first occurrence of something. r: The substring to find is a regular expression.标准正则表达式（[url=http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html]http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html[/url] ） 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.在正则表达式中允许空格和注释。 [b]范例如下：[/b] [b]输出结果：[/b] foo bAr XYar i: foo XYr XYar if: foo XYr baar r: foo XYAr XYr ri: foo XYr XYr rif: foo XYr baar  [b]更多范例：[/b] 原文：str = 2积分兑换30元优惠券 ${str?replace('\b\d+积分','','r')} 输出：兑换30元优惠券 [b]ps：freemarker的replace功能[/b] 替换字符串 replace  将s里的所有的ba替换成xy 规则参数包含: i r m s c f 具体含义如下:  · i: 大小写不区分.  · f: 只替换第一个出现被替换字符串的字符串  · r:  XY是正则表达式  · 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.  · s: Enables dotall mode for regular expressions (same as Perl singe-line mode). In dotall 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.