Implement localization for error messages

client/src/configureRoutes.tsx

@@ -22,6 +22,7 @@ import NotFoundPage from './components/NotFoundPage';
 export default () => (
   <Route component={App}>
     <Route path='/' component={WelcomePage} />
+    <Route path='/Locale' component={WelcomePage} />
     <Route path='/owners/list' component={FindOwnersPage} />
     <Route path='/owners/new' component={NewOwnerPage} />
     <Route path='/owners/:ownerId/edit' component={EditOwnerPage} />

pom.xml

@@ -43,6 +43,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
+        <dependency>
+	    <groupId>org.springframework.boot</groupId>
+	    <artifactId>spring-boot-starter-thymeleaf</artifactId>
+	 </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
@@ -52,6 +56,7 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+
         <dependency>
 	        <groupId>org.springframework.boot</groupId>
 	        <artifactId>spring-boot-devtools</artifactId>

src/main/java/org/springframework/samples/petclinic/config/AppConfig.java

@@ -0,0 +1,36 @@
+package org.springframework.samples.petclinic.config;
+
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+import java.util.Locale;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
+
+@Configuration
+public class AppConfig extends WebMvcConfigurerAdapter {
+
+	   @Bean
+	   public LocaleResolver localeResolver() {
+	       SessionLocaleResolver sessionLocaleResolver = new SessionLocaleResolver();
+	       sessionLocaleResolver.setDefaultLocale(Locale.US);
+	       return sessionLocaleResolver;
+	   }
+
+	   @Bean
+	   public LocaleChangeInterceptor localeChangeInterceptor() {
+	       LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
+	       lci.setParamName("lang");
+	       return lci;
+	   }
+
+	   @Override
+	   public void addInterceptors(InterceptorRegistry registry) {
+	       registry.addInterceptor(localeChangeInterceptor());
+	   }
+
+}

src/main/java/org/springframework/samples/petclinic/web/LocaleController.java

@@ -0,0 +1,15 @@
+package org.springframework.samples.petclinic.web;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+@Controller
+public class LocaleController {
+
+	@RequestMapping(value="/locale", method = RequestMethod.GET)
+	public String getLocalePage() {
+		return "welcome";
+	}
+
+}