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Added Locale folder in the MVCPracticeAdvanced section of a small course on Java EE

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	`1`	`+package Locale;`
	`2`	`+/*`
	`3`	`+Класс: https://docs.oracle.com/javase/8/docs/api/java/util/Locale.html`
	`4`	`+Документация: https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html`
	`5`	`+*/`
	`6`	`+import java.util.Locale;`
	`7`	`+import java.util.ResourceBundle;`
	`8`	`+`
	`9`	`+public class LocaleDemo {`
	`10`	`+ public static void main(String[] args) {`
	`11`	`+ /* Пример создания локали руками, в объект передаем язык и страну */`
	`12`	`+ Locale myLocale = new Locale("ru","RU");`
	`13`	`+ System.out.println(myLocale);`
	`14`	`+`
	`15`	`+ /* Предустановленные локали или константы */`
	`16`	`+ System.out.println(Locale.US);`
	`17`	`+ System.out.println(Locale.getDefault());`
	`18`	`+`
	`19`	`+ /* Используем файл ресурсов translations.properties */`
	`20`	`+ ResourceBundle nowTranslations = ResourceBundle.getBundle("translations", myLocale);`
	`21`	`+ System.out.println(nowTranslations.getString("page.login.password"));`
	`22`	`+`
	`23`	`+ }`
	`24`	`+}`

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	`1`	`+package Locale;`
	`2`	`+`
	`3`	`+import jakarta.servlet.ServletException;`
	`4`	`+import jakarta.servlet.annotation.WebServlet;`
	`5`	`+import jakarta.servlet.http.HttpServlet;`
	`6`	`+import jakarta.servlet.http.HttpServletRequest;`
	`7`	`+import jakarta.servlet.http.HttpServletResponse;`
	`8`	`+`
	`9`	`+import java.io.IOException;`
	`10`	`+`
	`11`	`+@WebServlet("/locale")`
	`12`	`+public class LocaleServlet extends HttpServlet {`
	`13`	`+`
	`14`	`+ @Override`
	`15`	`+ protected void doPost(HttpServletRequest req,`
	`16`	`+ HttpServletResponse resp) throws ServletException, IOException {`
	`17`	`+`
	`18`	`+ String language = req.getParameter("lang");`
	`19`	`+ req.getSession().setAttribute("lang", language);`
	`20`	`+`
	`21`	`+ String prevPage = req.getHeader("referer");`
	`22`	`+ String thisPage = prevPage != null ? prevPage : "/international_login";`
	`23`	`+ resp.sendRedirect(thisPage + "?lang=" + language);`
	`24`	`+ }`
	`25`	`+}`

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