问题描述
我创建了一个从FreeMarker实现 TemplateMethodModelEx 的类.假设 exec()函数返回一个字符串:"Hello $ {username}"
I've created a class that implements TemplateMethodModelEx from FreeMarker. Pretend the exec() function returns a String: "Hello ${username}"
我将类分配给数据模型中的方法:
I assign the class to a method in the data model:
dataModel.put("myMethod", myClassInstance);
dataModel.put("username", "John Doe");
我的HTML模板如下:
My HTML template looks like this:
<p>${myMethod()}</p>
这意味着在处理模板时将生成以下输出:
Which means that the following output is generated, when the template is processed:
<p>Hello ${username}</p>
由于我的数据模型中实际上有一个用户名值，所以我希望输出为:
Since there is actually a username value in my data model, I'd rather want the output to be:
<p>Hello John Doe</p>
如何告诉FreeMarker解析 myMethod()的结果?我尝试了?eval 和?interpret ，都无法完成我想要的. FreeMarker可以做到这一点吗?
How do I tell FreeMarker to parse the result of myMethod()? I tried both ?eval and ?interpret and both fail to accomplish what I want. Is this possible with FreeMarker?
推荐答案
您需要从字符串中删除${}才能使用?eval.从方法中以字符串形式返回username，并使用?eval或从.vars获取变量.
You need to remove ${} from a string to use ?eval. Return username as a string from your method and use ?eval or get variable from .vars.
<p>${classInstance.myMethod()?eval}</p>
或
<p>${.vars[classInstance.myMethod()]}</p>
如果您不仅要从方法中返回变量名，还要返回带有表达式的字符串(例如"Hello $ {username}")，请使用?interpret.
If you want to return not just a variable name but a string with an expression (e.g. "Hello ${username}") from the method then use ?interpret.
<#assign inlineTemplate = classInstance.myMethod()?interpret>
<@inlineTemplate />
这篇关于我的FreeMarker方法返回带有$ {variable}的字符串-如何强制FreeMarker解析该字符串?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！