Freemarker-仅将getter用于bean [英] Freemarker - only use getter for beans

问题描述

我的实体中有一些构建器功能，freemarker无法处理.

I have some builder functions in my entities, which cannot be handled by freemarker.

例如，我有以下bean/实体:

For example, I have the following bean/entity:

public class User{

    private Long number;

    public Long getNumber(){
        return this.number;
    }

    public void setNumber(Long number){
        this.number = number;
    }

    public User number(Long number){
        this.number = number;
    }
}

我的自由标记模板是这样的:

And my freemarker template is something like this:

<span>${user.number}</span>

我将如下进行动态处理:

which I process on the fly as follows:

User user = getUser();
Map<String, Object> context = new HashMap<>();
contaxt.put("user", user);
Configuration configuration = new Configuration(Configuration.VERSION_2_3_0);
configuration.setObjectWrapper(new BeansWrapper(Configuration.VERSION_2_3_0));
Template t = new Template("usertpl", template, configuration);
String result = FreeMarkerTemplateUtils.processTemplateIntoString(t, model);

由于我的实体包含方法"number(Long)"，因此freemarker尝试使用此方法，该方法实际上是一个setter方法-因此不起作用.

Since my entity contains a method "number(Long)", freemarker tries to use this, which is actually a setter - so it is not working.

我知道，我可以在模板中使用getter，但是模板应该由用户定义(对于那些不是程序员的人，我认为${user.number}比${user.getNumber()}更容易理解)

I know, that i can use the getter in the template, but the template should be defined by users (where I think ${user.number} is more comprehensible than ${user.getNumber()} for those who are not programmers)

所以，我正在寻找另一种解决方案...

So, I'm searching for another solution...

是否可以配置freemarker，使其仅使用getter(getNumber())来访问属性，而不使用number(Long)?

Is there a possibility to configure freemarker so that it only uses the getter (getNumber()) to access the property, instead of using the number(Long)?

推荐答案

您可以使用setMethodAppearanceFineTuner像这样配置BeansWrapper.为了方便复制粘贴，在这里我将使用构建器代替new，DefaultObjectWrapper代替BeansWrapper和VERSION_2_3_25代替VERSION_2_3_0，但这也适用于您的设置:

You can configure BeansWrapper like that with setMethodAppearanceFineTuner. For the sake of hasty copy-pasters, I will use here a builder instead of new, DefaultObjectWrapper instead of BeansWrapper, and VERSION_2_3_25 instead of VERSION_2_3_0, but this also works with your setup:

DefaultObjectWrapperBuilder owb = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_25);
owb.setMethodAppearanceFineTuner(new MethodAppearanceFineTuner() {
    @Override
    public void process(MethodAppearanceDecisionInput in, MethodAppearanceDecision out) {
        out.setMethodShadowsProperty(false);
    }
});
cfg.setObjectWrapper(owb.build());

就JavaDoc中的实验性"免责声明而言，请放心，这些免责声明将在2.3.26版中处于实验状态.

As of the "experimental" disclaimers in the JavaDoc, don't worry, these will leave experimental status in 2.3.26.

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