Question

我有这个豆子：

@ManagedBean(name="langListing")
@ViewScoped
public class LangListing implements Serializable
{
    private List<SelectItem> languages = new ArrayList<SelectItem>();
    private String language;

    public LangListing() {
       createLangs(); // lazy loading
    }   

    public void createLangs()
    {   
       languages.add(new SelectItem("en", FacesUtil.getResourceBundle().getString("LANG_LABEL_01"))); // English
       languages.add(new SelectItem("fr", FacesUtil.getResourceBundle().getString("LANG_LABEL_02"))); // French
    }

    public List<SelectItem> getLanguages() { 
       return languages;
    }

    public String getLanguage()
    {
       if (FacesContext.getCurrentInstance().getViewRoot().getLocale() != null) {
          language = FacesContext.getCurrentInstance().getViewRoot().getLocale().toString();
       } else {
          language = "en";
       }

       return language;
    }

    public void setLanguages(List<SelectItem> languages) {
       this.languages = languages;
    }    

    public void setLanguage(String language) {
       this.language = language;
    }

    public void changeLocale(AjaxBehaviorEvent event) {
       FacesContext.getCurrentInstance().getViewRoot().setLocale(new Locale(getLanguage()));
    }
 }

我正在调用bean方法：

<h:selectOneMenu id="selectLang" immediate="true" value="#{langListing.language}">
    <f:ajax listener="#{langListing.changeLocale}" render="@form" />
    <f:selectItems value="#{langListing.languages}" />
</h:selectOneMenu>

问题是我无法获取将语言环境从英语更改为法语的代码。有谁能看到这个问题？请帮忙。

Answer 1

您设置的值为getLanguage()，返回当前UIViewRoot区域设置或仅en。它不会返回所选的语言值。

您需要修改bean中的逻辑。这是一个重写：

@ManagedBean(name="langListing")
@ViewScoped
public class LangListing implements Serializable {
    private List<SelectItem> languages = new ArrayList<SelectItem>();
    private String language;

    public LangListing() {
       languages.add(new SelectItem("en", FacesUtil.getResourceBundle().getString("LANG_LABEL_01"))); // English
       languages.add(new SelectItem("fr", FacesUtil.getResourceBundle().getString("LANG_LABEL_02"))); // French
       language = FacesContext.getCurrentInstance().getViewRoot().getLocale().toString();
    }   

    public List<SelectItem> getLanguages() { 
       return languages;
    }

    public String getLanguage() {
       return language;
    }

    public void setLanguages(List<SelectItem> languages) {
       this.languages = languages;
    }    

    public void setLanguage(String language) {
       this.language = language;
    }

    public void changeLocale(AjaxBehaviorEvent event) {
       FacesContext.getCurrentInstance().getViewRoot().setLocale(new Locale(language));
    }
 }

请注意，此方法存在更多潜在的漏洞/漏洞。 bean是视图作用域而不是会话作用域，您似乎没有使用<f:view>（因为它需要Locale，而不是String）。我热烈建议您完成this answer以使其与之对齐。

JSF 2 - Ajax - 区域设置未更新

1 个答案: