問題描述
我想創建一個帶有本地化選項的登錄屏幕來翻譯名稱，當我從默認英語更改為阿拉伯語時它會崩潰
I want to create a login screen with localization option to translate the name and when i change from the default English to Arabic it crash
這里是 faces.config.xml
here is the faces.config.xml
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2.0">
<application>
<locale-config>
<default-locale>en</default-locale>
<supported-locale>ar</supported-locale>
</locale-config>
<resource-bundle>
<base-name>mypack.enar</base-name>
<var>msg</var>
</resource-bundle>
</application>
</faces-config>
托管豆
import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.context.FacesContext;
import javax.faces.event.ValueChangeEvent;
/**
*
* @author body
*/
@ManagedBean(name = "localize")
@RequestScoped
public class LocalizeMBean implements Serializable {
/**
* @return the countries
*/
public static Map<String, Object> getCountries() {
return countries;
}
/**
* @param aCountries the countries to set
*/
public static void setCountries(Map<String, Object> aCountries) {
countries = aCountries;
}
private String localeCode;
/**
* Creates a new instance of LocalizeMBean
*/
public void setLocaleCode(String localeCode) {
this.localeCode = localeCode;
}
public Map<String, Object> getCountriesInMap() {
return getCountries();
}
public String getLocaleCode() {
return localeCode;
}
private static Map<String, Object> countries;
static {
setCountries(new LinkedHashMap<String, Object>());
getCountries().put("English", Locale.ENGLISH); //label, value
getCountries().put("Arabic", Locale.UNICODE_LOCALE_EXTENSION);
}
public void countryLocaleCodeChanged(ValueChangeEvent e) {
String newLocaleValue = e.getNewValue().toString();
//loop country map to compare the locale code
for (Map.Entry<String, Object> entry : getCountries().entrySet()) {
if (entry.getValue().toString().equals(newLocaleValue)) {
FacesContext.getCurrentInstance()
.getViewRoot().setLocale((Locale) entry.getValue());
}
}
}
}
JSF 頁面
<h:head>
<title>My Login Page</title>
<h:outputStylesheet library="mycss" name="login-box.css"/>
</h:head>
<h:body>
<h:form>
<div style="padding: 100px 0 0 250px;">
<div id="login-box">
<H2>Login</H2>
My Login Screen
<br />
<h:selectOneMenu value="#{localize.localeCode}" onchange="submit();"
valueChangeListener="#{localize.countryLocaleCodeChanged}">
<f:selectItems value="#{localize.countriesInMap}" />
</h:selectOneMenu>
<br />
<div id="login-box-name" style="margin-top:20px;">
<h:outputLabel value="#{msg.namee}" />
</div>
<div id="login-box-field" style="margin-top:20px;">
<h:inputText styleClass="form-login" title="Username" value="" size="30" maxlength="2048" />
</div>
<div id="login-box-name">Password:</div><div id="login-box-field"><h:inputSecret styleClass="form-login" title="Password" value="" size="30" maxlength="2048" /></div>
<br />
<div class="login-box-options"><h:selectBooleanCheckbox value="1"/>Remember me<h:commandLink style="margin-left:30px;" value="Forget Password"/></div>
<br />
<br />
<h:commandButton styleClass="button"/>
</div>
</div>
</h:form>
</h:body>
</html>
我在組合框中更改時的異常
The Exception when i change in the combobox
javax.faces.component.UpdateModelException: javax.el.PropertyNotWritableException: /index.xhtml @29,118 value="": Illegal Syntax for Set Operation
at javax.faces.component.UIInput.updateModel(UIInput.java:853)
at javax.faces.component.UIInput.processUpdates(UIInput.java:735)
at javax.faces.component.UIForm.processUpdates(UIForm.java:281)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1242)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1242)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1231)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.el.PropertyNotWritableException: /index.xhtml @29,118 value="": Illegal Syntax for Set Operation
at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:136)
at javax.faces.component.UIInput.updateModel(UIInput.java:818)
... 38 more
推薦答案
請仔細閱讀異常信息.答案就在那里.
Please carefully read the exception message. The answer is straight in there.
javax.el.PropertyNotWritableException:/index.xhtml @29,118 value="": 非法集操作語法
javax.el.PropertyNotWritableException: /index.xhtml @29,118 value="": Illegal Syntax for Set Operation
在第 29 行，/index.xhtml 的第 118 個字符，你有一個 value="".對于應該可以通過 setter 方法寫入的 EL 值表達式，這不是有效的語法.
At line 29, character 118 of /index.xhtml you've a value="". This is not a valid syntax for an EL value expression which should be writable through a setter method.
通常，您像 value="#{bean.property}" 這樣指定 value 屬性，其中 bean 有一個 getProperty() 和一個 setProperty() 方法符合 javabeans 規范.
Normally, you specify the value attribute like so value="#{bean.property}" wherein the bean has a getProperty() and a setProperty() method conform javabeans specification.
很可能是這個:
<h:inputText styleClass="form-login" title="Username" value="" size="30" maxlength="2048" />
我不確定您為什么要這樣指定值.這是完全錯誤的.您應該完全刪除它
I'm not sure why you specified the value like that. This is plain wrong. You should either remove it altogether
<h:inputText styleClass="form-login" title="Username" size="30" maxlength="2048" />
或將其綁定到有效的 bean 屬性
or bind it to a valid bean property
<h:inputText styleClass="form-login" title="Username" value="#{someBean.userName}" size="30" maxlength="2048" />
請注意，此問題與更改 JSF 語言環境無關.
Please note that this problem has nothing to do with changing the JSF locale.
與具體問題無關，嵌套表單在 HTML 中是非法，因此也在JSF中.您應該將語言選擇和用戶登錄拆分為 2 個單獨的表單.您不想在更改語言時提交登錄數據.此外，您可能會發現此答案中的提示有助于正確更改 JSF 語言環境:JSF 中的本地化，如何記住每個會話而不是每個請求/視圖選擇的語言環境
Unrelated to the concrete problem, nesting forms is illegal in HTML and therefore also in JSF. You should split the language selection and the user login over 2 separate forms. You don't want to submit the login data when you change the language. Further, you may find the hints in this answer helpful as to how to properly change the JSF locale: Localization in JSF, how to remember selected locale per session instead of per request/view
這篇關于javax.el.PropertyNotWritableException:/index.xhtml @29,118 value=""": Set Operation 的非法語法的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！