限制FreeMarker中的字符串长度 [英] Limit string length in FreeMarker
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问题描述
我正在尝试从FreeMarker中的字符串中获取子字符串。
但是有两个要考虑的因素:
I'm trying to get a substring from a string in FreeMarker. However there are 2 thigns to consider:
- 字符串可以为null
- 字符串可以短于最大字符串长度
我执行以下操作:
<#list landingpage1.popularItems as row>
<li>
<span class="minititle">
<#assign minititle=(row.title!"")>
<#if minititle?length < 27>
${minititle}
<#else>
${minititle?substring(0,26)} ...
<#/if>
</span>
</li>
</#list>
我收到freemarker错误说:
I get a freemarker error saying:
Failed to load templates: Encountered "</#list>" at line 144, column 65 in landingpage1.ftl.
Was expecting one of:
<ATTEMPT> ...
<IF> ...
<LIST> ...
<FOREACH> ...
<SWITCH> ...
<ASSIGN> ...
<GLOBALASSIGN> ...
<LOCALASSIGN> ...
<INCLUDE> ...
<IMPORT> ...
<FUNCTION> ...
<MACRO> ...
<TRANSFORM> ...
<VISIT> ...
<STOP> ...
<RETURN> ...
<CALL> ...
<SETTING> ...
<COMPRESS> ...
<COMMENT> ...
<TERSE_COMMENT> ...
<NOPARSE> ...
<END_IF> ...
<BREAK> ...
<SIMPLE_RETURN> ...
<HALT> ...
<FLUSH> ...
<TRIM> ...
<LTRIM> ...
<RTRIM> ...
<NOTRIM> ...
<SIMPLE_NESTED> ...
<NESTED> ...
<SIMPLE_RECURSE> ...
<RECURSE> ...
<FALLBACK> ...
<ESCAPE> ...
<NOESCAPE> ...
<UNIFIED_CALL> ...
<WHITESPACE> ...
<PRINTABLE_CHARS> ...
<FALSE_ALERT> ...
"${" ...
"#{" ...
很奇怪。
有人可以帮忙吗?
Very odd. Can anybody help?
推荐答案
经过大量测试后,错误神奇地解决了。必须是业力。
The error magically solved itself after extensive testing. Must be karma.
我的安全检查的最终代码:
My final code for safe checking:
<#assign minititle=(row.title!"")>
<#if minititle?length < 27>
${minititle}
<#else>
${minititle?substring(0,26)} ...
</#if>
希望它可以帮助其他人
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