如何使用Primefaces向bean中的HashMap输入值？

Question

I have a page where I have to associate two fields using key-value pair and save. For example, I have a number of participant s who has price s. If I use two p:inputText fields to enter their values, how should the backing bean look like?

Also, I want to display the number of such pairs of p:inputText fields according to the number of participants I enter. I have a similar question answered here How to insert a primefaces input text dynamically? . But I want to be able to submit the values to a key-value pair.

Answer 1

In EL, you can treat maps exactly the same way as entity/model beans.

<h:inputText value="#{bean.map.key1}" />
<h:inputText value="#{bean.map.key2}" />
<h:inputText value="#{bean.map.key3}" />

This example will put the input values under map keys key1 , key2 and key3 .

Note: make sure that the map isn't null . Like as with normal entity/model beans, JSF/EL won't precreate it for you. Do it in the @PostConstruct yourself.