如何将单个类注释为两个不同的托管bean？

Question

我已经创建了一个地址bean，我想使用它两次-一次用于街道地址，一次用于邮寄地址。根据下面的说明，我可以使用faces config来实现这一点，但我想知道是否可以通过注释来实现这一点。

例如，将@ManagedBean(name="StreetAddress")和@ManagedBean(name="MailingAddress")放在同一个类中？我觉得我遗漏了一些明显的东西，但我不确定是什么。

<managed-bean>
    <managed-bean-name>MailingAddress</managed-bean-name>
    <managed-bean-class>com.leetb.jsf_ex1.model.AddressBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
    <map-entries/>
</managed-bean>
<managed-bean>
    <managed-bean-name>StreetAddress</managed-bean-name>
    <managed-bean-class>com.leetb.jsf_ex1.model.AddressBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
    <map-entries/>
</managed-bean>

public class AddressBean {

    private String line_one;
    private String line_two;
    private String suburb;
    private String state;
    private String postcode;

/* getters and setters snipped */
}

Answer 1

你有一个设计上的错误。这些看起来更像模型类，而不是支持bean类。模型类根本不应该是托管bean。使它们成为支持bean类的属性，并对其进行管理。

例如。

@ManagedBean
@ViewScoped
public class AddressBacking {

    private AddressBean mailingAddress;
    private AddressBean streetAddress;

    @PostConstruct
    public void init() {
        // Prepare them here yourself. For example, when it's for a new entry.
        mailingAddress = new AddressBean();
        streetAddress = new AddressBean();
    }

    public void save() {
        // ...
    }

    // ...
}

(顺便说一下，我将AddressBean重命名为Address )

并按如下方式使用它

<h:inputText value="#{addressBacking.mailingAddress.line_one}" />
...
<h:inputText value="#{addressBacking.streetAddress.line_one}" />
...