SpringBoot整合Freemarker（二）

if分支

语法：

<#if condition>...
<#elseif condition2>...
<#elseif condition3>...
<#else>...
</#if>

例子：

<#if x = 1>x is 1
</#if>
---------------------------------
<#if x = 1>x is 1
<#else>x is not 1
</#if>

switch分支

语法：

<#switch value><#case refValue1>...<#break><#case refValue2>...<#break><#case refValueN>...<#break><#default>...
</#switch>

例子：

<#switch cloth.size>  // 这里的变量类型可以是字符串也可是整数<#case "small">This will be processed if it is small<#break><#case "medium">This will be processed if it is medium<#break><#case "large">This will be processed if it is large<#break><#default>This will be processed if it is neither
</#switch>

list循环

<#list sequence as item>
...
<#if item = "spring"><#break></#if>
...
</#list>

例子：

<#assign seq = ["winter", "spring", "summer", "autumn"]> // assign 定义一个变量，这里定义了一个数组
<#list seq as x>   // list循环遍历这个数组${x_index + 1}. ${x}<#if x_has_next>,</#if>
</#list>

关键字：

item_index:是list当前值的下标，从0开始item_has_next:判断list是否还有值

macro, nested, return

语法

<#macro name param1 param2 ... paramN> ...<#nested loopvar1, loopvar2, ..., loopvarN>  //有了这和标签：调用宏的时候，必须用双标签...<#return>...
</#macro>

用例

<#macro test foo bar="Bar"  baaz=-1>Test text, and the params: ${foo}, ${bar}, ${baaz}
</#macro><@test foo="a" bar="b" baaz=5*5-2/>
<@test foo="a" bar="b"/>
<@test foo="a" baaz=5*5-2/>
<@test foo="a"/> 
输出Test text, and the params: a, b, 23Test text, and the params: a, b, -1Test text, and the params: a, Bar, 23Test text, and the params: a, Bar, -1