struts2 internationalization area attribute selection

[Question] The choice of language version depends on the settings of the browser. Is it possible to allow the user to set the language environment of the application without modifying the properties of the browser? Answer: Yes
[Background knowledge for solving the problem] The Struts2 framework provides the i18n interceptor, which functions as follows:
(1) The i18n interceptor automatically finds a parameter named request_locale in the request before executing the Action method. If this parameter exists, the interceptor converts it into a Locale object and sets it as the user's default Locale.
(2) The i18n interceptor will also save the Locale object generated above in the attribute named "WW_TRANS_I18N_LOCALE" of the user Session.

(3) Once there is an attribute named "WW_TRANS_I18N_LOCALE" in the user's Session, the Locale specified by this attribute will be used as the browser's default Locale.

[Specific steps]
1. Add a key-value pair to the resource file and add it in
English: language=Select Language
and add it in Chinese (requires transcoding): language=Select language

2. Create the JavaBean class Locales.java, the key code is as follows:

public class Locales {
	private Locale current;
	private Map<String,Locale> locales;
	public Locale getCurrent() {
		return current;
	}

	public void setCurrent(Locale current) {
		this.current = current;
	}

	public Map<String, Locale> getLocales() {
		Map<String, Locale> locales=new Hashtable<String, Locale>();
		locales.put("Simplified Chinese", Locale.CHINA);
		locales.put("American English", Locale.US);
		return locales;
	}

3. Add the following code to login.jsp

(1) Add between <head> and </head> of the web page:

<script type="text/javascript">
	function langSelecter_onChanged() {
		document.langForm.submit();
	}
</script>

Analysis: Define a JavaScript function whose function is to submit the form (set the onchange event handler in the drop-down list box, which is called when the value of the list box changes)

(2) Add the following code to the <body> of login.jsp

	<s:set name="SESSION_LOCALE" value="#session['WW_TRANS_I18N_LOCALE']">
		<s:bean name="com.edu.entity.Locales" id="locales">
			<s:param name="current"
				value="SESSION_LOCALE==null?locale:SESSION_LOCALE" />
		</s:bean>
	</s:set>
	<s:form action="language" name="langForm">
		<s:select list="#locales.locales" key="language" listKey="value"
			listValue="key" value="#locales.current" name="request_locale"
			onchange="langSelecter_onChanged()"></s:select>
	</s:form>

4. Realize display

struts2 internationalization area attribute selection

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