我正在使用 jsf 2.1、prettyfaces 3.3.3 和休眠 jpa 3.6.7。我有国家页面,我正在尝试使用命令按钮发送评论。
国家.xhtml:
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core">
    <f:metadata>
        <f:viewParam name="country" value="#{countryBean2.selectedCountry}" converter="countryConverter"
                     required="true" />
    </f:metadata>
    <h:head>
        <title>Country</title>
    </h:head>
    <h:body>
        <h:form id="form">
            <h:outputText value="#{countryBean2.selectedCountry.countryName}" />
            <br/><br/>
            <h:outputText value="Comment:" />
            <h:inputText value="#{countryBean2.comment}" />
            <br/>
            <h:commandButton value="Send" action="#{countryBean2.sendComment}" />
        </h:form>
    </h:body>
</html>
国家转换器:
public class CountryConverter implements Converter {
    public static EntityCountry country = new EntityCountry();
    EntityManagerFactory emf = Persistence.createEntityManagerFactory("testPU");
    @Override
    public EntityCountry getAsObject(FacesContext context, UIComponent component, String value) {
        EntityManager em = emf.createEntityManager();
        Query query = em.createQuery("SELECT c FROM EntityCountry c WHERE c.countryName = :countryName")
                .setParameter("countryName", value);
        country = (EntityCountry) query.getSingleResult();
        return country;
    }
    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value) {
        EntityCountry c = (EntityCountry) value;
        return c.getCountryName();
    }
漂亮的config.xml:
<pretty-config xmlns="http://ocpsoft.com/prettyfaces/3.3.0"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="http://ocpsoft.com/prettyfaces/3.3.0
                                        http://ocpsoft.com/xml/ns/prettyfaces/ocpsoft-pretty-faces-3.3.0.xsd">
    <url-mapping id="home"> 
        <pattern value="/" /> 
        <view-id value="/faces/index.xhtml" />
    </url-mapping>
    <url-mapping id="country">
        <pattern value="/country/#{country}" />
        <view-id value="/faces/country.xhtml" />
    </url-mapping>
</pretty-config>
faces-config.xml 中的转换器配置:
<converter>
    <converter-id>countryConverter</converter-id>
    <converter-for-class>test.EntityCountry</converter-for-class>
    <converter-class>test.CountryConverter</converter-class>
</converter>
当我首先打开 localhost:8080/test/country/england 页面时,一切正常。但是当我尝试通过命令按钮发送评论时,countryConverter 的 getAsObject 方法再次调用错误的字符串参数(例如“test.CountryBean@bd9eff”)并且找不到实体。
当我使用默认的丑陋网址(例如 localhost:8080/test/faces/country.xhtml?country=england)并尝试发送评论时,countryConverter 的 getAsObject 方法正在使用 true 字符串参数调用,我可以成功发送评论。我认为这是一个漂亮的错误,但我想使用漂亮的网址。