在布尔值和字符串之间转换h:selectBooleanCheckbox值 [英] Convert h:selectBooleanCheckbox value between boolean and String

问题描述

我有一个包含字段creditCard的后备bean，该字段可以具有从数据库填充的两个字符串值y或n.我想在复选框中显示此内容，以便将y和n转换为boolean.

I have a backing bean containing a field creditCard which can have two string values y or n populated from the DB. I would like to display this in checkbox so that y and n gets converted to boolean.

我该如何实施?我不能使用自定义转换器，因为getAsString()在呈现响应时返回String，而我需要boolean.

How can I implement it? I can't use a custom converter as getAsString() returns String while rendering the response whereas I need a boolean.

推荐答案

<h:selectBooleanCheckbox>组件不支持自定义转换器.该属性必须为boolean.期间.

The <h:selectBooleanCheckbox> component does not support a custom converter. The property has to be a boolean. Period.

最好的办法是在持久层中进行转换，或者添加额外的布尔getter/setter来装饰原始的y/n getter/setter或完全替换旧的getter/setter.例如

Best what you can do is to do the conversion in the persistence layer or to add extra boolean getter/setter which decorates the original y/n getter/setter or to just replace the old getter/setter altogether. E.g.

private String useCreditcard; // I'd rather use a char, but ala.

public boolean isUseCreditcard() {
    return "y".equals(useCreditcard);
}

public void setUseCreditcard(boolean useCreditcard) {
    this.useCreditcard = useCreditcard ? "y" : "n";
}

，然后在<h:selectBooleanCheckbox>中使用它.

<h:selectBooleanCheckbox value="#{bean.useCreditcard}" />

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