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1、一篇很全面的freemarker教程FreeMarker的模板文件并不比HTML页面复杂多少,FreeMarker模板文件主要由如下4个部分组成:1,文本:直接输出的部分2,注释:<#--...-->格式部分,不会输出3,插值:即${...}或#{...}格式的部分,将使用数据模型中的部分替代输出4,FTL指令:FreeMarker指定,和HTML标记类似,名字前加#予以区分,不会输出下面是一个FreeMarker模板的例子,包含了以上所说的4个部分
Welcome!<</p><p>2、/title><br></head><br><body><br><#--注释部分--><br><#--下面使用插值--><h1>Welcome${user}!</h1><br><p>Wehavetheseanimals:<br><u1><br><#--使用FTL指令--><#listanimalsasbeing><br><li>${being.name}for${being.price}Euros<br><#list><br><u1><br></body><br></html>1,FTL指令规则在FreeMarker中,</p><p>3、使用FTL标签来使用指令,FreeMarker有3种FTL标签,这和HTML标签是完全类似的.1,开始标签:<#directivenameparameter>2,结束标签:</#directivename>3,空标签:<#directivenameparameter/>实际上,使用标签时前面的符号#也可能变成@,如果该指令是一个用户指令而不是系统内建指令时,应将#符号改成@符号.使用FTL标签时,应该有正确的嵌套,而不是交叉使用,这和XML标签的用法完全一样.如果全用不存在的指令,FreeMarker不会使用模板输出,而</p><p>4、是产生一个错误消息.FreeMarker会忽略FTL标签中的空白字符.值得注意的是<,/>和指令之间不允许有空白字符.2,插值规则FreeMarker的插值有如下两种类型:1,通用插值${expr};2,数字格式化插值:#{expr}或#{expr;format}2.1通用插值对于通用插值,又可以分为以下4种情况:1,插值结果为字符串值:直接输出表达式结果2,插值结果为数字值:根据默认格式(由#setting指令设置)将表达式结果转换成文本输出.可以使用内建的字符串函数格式化单个插值,如下面的例子:<#settionnu</p><p>5、mber_format="currency"/><#assignanswer=42/>${answer}${answer?string}<#--thesameas${answer}-->${answer?string.number}${answer?string.currency}${answer?string.percent}${answer}输出结果是:$42.00$42.0042$42.004,200%3,插值结果为日期值:根据默认格式(由#setting指令设置)将表达式结果转换成文本输出.可以使用内建的字符串函</p><p>6、数格式化单个插值,如下面的例子:${lastUpdated?string("yyyy-MM-ddHH:mm:sszzzz")}${lastUpdated?string("EEE,MMMd,''yy")}${lastUpdated?string("EEEE,MMMMdd,yyyy,hh:mm:ssa'('zzz')'")}输出结果是:2008-04-0808:08:08PacificDaylightTimeTue,Apr8,'03Tuesday,April08,2003,08:08:08PM(PDT)4,插值结果为布尔值:</p><p>7、根据默认格式(由#setting指令设置)将表达式结果转换成文本输出.可以使用内建的字符串函数格式化单个插值,如下面的例子:<#assignfoo=true/>${foo?string("yes","no")}输出结果是:yes2.2数字格式化插值数字格式化插值可采用#{expr;format}形式来格式化数字,其中format可以是:mX:小数部分最小X位MX:小数部分最大X位如下面的例子:<#assignx=2.582/><#assigny=4/>#{x;M2}<#--输出2.58-->#{y;M2}<#--输出4-</p><p>8、->#{x;m2}<#--输出2.6-->#{y;m2}<#--输出4.0-->#{x;m1M2}<#--输出2.58-->#{x;m1M2}<#--输出4.0-->3,表达式表达式是FreeMarker模板的核心功能,表达式放置在插值语法${}之中时,表明需要输出表达式的值;表达式语法也可与FreeMarker标签</p> </div>
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