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 />${foo?string("yes","no")} <#-- yes -->
=============逻辑判断==================
2．a:<#if condition>...<#elseif conditinc 发布于2007-09-08 16:18:57 ion2>...<#elseif condition3>......<#else>...其中空值判断可以写成<#if book.name?? ></#if>
b:<#switch value><#case refValue1> ... <#break><#case refValue2> ... <#break>...<#case refValueN> ... <#break><#default> ...</#switch> ===============循环读取=================3．<#list sequence as item>...</#list>空值判断<#if bookList?size = 0></#list>e.g.<#list employees as e>${e_index}. ${e.name}</#list><#if mole?default(0)!=0>
=============用来压缩空白空间和空白的行===============
用例
<#assign x = " moo ">(<#compress>1 2 3 4 5${moo}test onlyI said, test only
)
输出(1 2 3 4 5mootest onlyI 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-8locale=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>