JSF-< ui:repeat/>在java.util.Set上? [英] JSF -- <ui:repeat /> over a java.util.Set?

问题描述

<ui:repeat />标记是否支持对java.util.Set进行迭代?我尝试遍历Set中包含的JPA域实体对象，但收到错误.有什么我想念的吗?是否需要显示其他标志?

Does the <ui:repeat /> tag support iterating over a java.util.Set? I've tried iterating over my JPA domain entity objects contained in a Set, but receive errors. Is there something I'm missing? Does an additional flag need to be present or something?

推荐答案

不，ui:repeat不支持Set，h:dataTable也不支持.

No, the ui:repeat does not support Set, nor does h:dataTable.

您应该从集合中返回一个列表，并使用它.

You should return a List from the Set, and use that instead.

public List<T> getListFromSet(Set<T> set) {
  return new ArrayList<T>(set);
}

您应避免使用c:forEach； 此处是有关原因的文章.

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