有关freemarker的语法,循环,逻辑
2008
年11月12日
星期三 01:34 P.M.
============== 常用语法================= 三. EG.一个对象BOOK 1.输出 ${book.name} 空值判断:${book.name?if_exists }, ${book.name?default(‘xxx’)}//默认值xxx ${ book.name!"xxx"}//默认值xxx 日期格式:${book.date?string('yyyy-MM-dd')} 数字格式:${book?string.number}--20 ${book?string.currency}--<#-- $20.00 --> ${book?string.percent}—<#-- 20% --> 插入布尔值: <#assign foo=ture /> ${foo?string("yes","no")} <#-- yes -->
=============
逻辑判断==================
2. a: <#if condition>... <#elseif condit inc 发布于2007-09-08 16:18:57 ion2>... <#elseif condition3>...... <#else>... 其中空值判断可以写成<#if book.name?? >
</#if>
b: <#switch value> <#case refValue1> ... <#break> <#case refValue2> ... <#break> ... <#case refValueN> ... <#break> <#default> ... </#switch> =============== 循环读取================= 3. <#list sequence as item> ... </#list> 空值判断<#if bookList?size = 0></#list> e.g. <#list employees as e> ${e_index}. ${e.name} </#list>
<#if mole?default(0)!=0>
=============
用来压缩空白空间和空白的行===============
用例
<#assign x = " moo /n/n "> (<#compress> 1 2 3 4 5 ${moo} test only
I said, test only
)
输出 (1 2 3 4 5 moo test only I said, test only)
==============Sequence
内置的计数器==============
3. Sequence
内置的计数器: xxx_index
用途:显示序号 模板:
<#list employees as e>
${e_index}. ${e.name} </#list>
输出:
1. Readonly
2. Robbin ==============Sequence 内置的分段器===================== 4. Sequence内置的分段器: chunk 用途:某些比较BT的排版需求 模板:
<#assign seq = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']>
<#list seq?chunk(4) as row> <ul> <li><#list row as cell>${cell} </#list></li> </ul> </#list>
<#list seq?chunk(4, '-') as row>
<tr> <td><#list row as cell>${cell} </#list></td> </tr> </#list> 输出:
<ul>
<li>a</li> <li>b</li> <li>c</li> <li>d</li> </ul> <ul> <li>e</li> <li>f</li> <li>g</li> <li>h</li> </ul> <ul> <li>i</li> <li>j</li> </ul>
<tr>
<td>a</td> <td>b</td> <td>c</td> <td>d</td> </tr> <tr> <td>e</td> <td>f</td> <td>g</td> <td>h</td> </tr> <tr> <td>i</td> <td>j</td> <td>-</td> <td>-</td> </tr> =====================freemarker 的list================================ Scalar String:${scalarString} Scalar Number:${scalarNumber} Object is:${scalarObject}
List
使用样例-List元素为Scalar对象:
<#list scalarList as value0>
Scalar List 值:${value0} </#list>
List
使用样例-List元素为User对象:
<#list userList as listUser>
List 对象User Id值:${listUser.userId} </#list>
Map
使用样例-Map Values元素为Scalar :
<#list scalarMap?keys as mykey>
Scalar Map key is :${mykey} Scalar Map value is:${scalarMap[mykey]} </#list>
Map
使用样例-Map Values元素为User对象:
<#list userMap?keys as key1>
<#assign mapUser="${userMap[key1]}" > User Object is :${mapUser} <#-- 以下方法有问题 User is :${mapUser.userId} <br> --> </#list>
==============FreeMarker
中list排序==============
升序: <#list list?sort_by("time") as v> </#list> 降序: <#list list?sort_by("time") as v> </#list> ===============freemarker 在模板中定义变量==============
在模板中定义的变量有三种类型:
plain变量:可以在模板的任何地方访问,包括include指令插入的模板,使用assign指令创建和替换 <#include "/WEB-INF/index/top.html"> ==============freemarker.properties 配置================ (1)解决输出中文乱码问题: default_encoding=UTF-8 locale=zh_CN number_format=#
(2)提高freemarker的性能
template_update_delay=60000
(3)freemarker的标签种类:
${..} # 代表是FTL tags <#if ...></#if> <#list totalList as elementObject>...</#list> @ ,代表用户自定义的标签 <#-- --> 注释标签,注意不是<!-- -->
=====================
将图片整除换行====== <#if (u_index+1)%4=0>当图片超过五个就换行=======
<table width="100%"> <tr> <td><table width="100%"> <tr> <#if map["最新-图片"]?exists> <#list map["最新-图片"] as u> <#if (u_index+1)%4=0> <td><table width="70" height="65" border="0" cellpadding="0" cellspacing="0"> <tr>
<td align="center" valign="middle" bgcolor="#6F7074">
<a target="_blank" href="shownews.page?id=${u.id?default("")}&mole=2 "><img src="${u.chartpath?default('')}" width="67" height="41" border="0" /></a></td> </tr> <tr> <td align="center" bgcolor="#6F7074"> <a target="_blank" href="shownews.page?id=${u.id?default("")}&mole=2 " class="tableff"> <@jf.greet title=u.title len=4 /></a> </td> </tr>
</table></td></tr><tr >
<#else> <td><table width="70" height="65" border="0" cellpadding="0" cellspacing="0"> <tr>
<td align="center" valign="middle" bgcolor="#6F7074">
<a target="_blank" href="shownews.page?id=${u.id?default("")}&mole=2 "><img src="${u.chartpath?default('')}" width="67" height="41" border="0" /></a></td> </tr> <tr> <td align="center" bgcolor="#6F7074"> <a target="_blank" href="shownews.page?id=${u.id?default("")}&mole=2 " class="tableff"> <@jf.greet title=u.title len=4 /></a> </td> </tr>
</table></td>
</#if> </#list> </#if> </tr> </table> </td> </tr> </table> </tr> </table></td> </#if> </#list> </#if> </tr> </table> </td> </tr> </table>
===============================freemarker
中在application
${Application.web_title}
在类里:
list=dser.indexvideo(cvo); if(list.size()!=0){ map.put("最新",list);}
在html静态页里:
<#import "/WEB-INF/ftl/index.ftl" as jf> (index.ftl <#macro greet title len> <#if title?length != 0> <#if (title?length>len)> ${title[0..len-1]} <#else> ${title?trim} </#if> <#else> ${title?default("")} </#if> </#macro> <#--时间比较--> <#macro vstime start end> <#if start?default("")==""||end?default("")==""> -- <#else> <#assign starts=start?replace("-","") > <#assign ends=end?replace("-","") > <#if (starts?number>ends?number)> <font color="red">以过期</font> <#else> 未过期 </#if> </#if> </#macro> )
<#if map["
最新"]?exists> <#list map["最新"] as u> ${u.filepath?default('')} <@jf.greet title=u.title len=6 /> </#list></#if> |