Add spring.thymeleaf.encoding to ThymeleafAutoConfiguration

Both the template resolver and the view resolver now have their
encoding set explicitly (defaulting to UTF-8).

Fixes gh-79

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration.java

@@ -100,6 +100,8 @@ public class ThymeleafAutoConfiguration {
 					"classpath:/templates/"));
 			resolver.setSuffix(this.environment.getProperty("suffix", ".html"));
 			resolver.setTemplateMode(this.environment.getProperty("mode", "HTML5"));
+			resolver.setCharacterEncoding(this.environment.getProperty("encoding",
+					"UTF-8"));
 			resolver.setCacheable(this.environment.getProperty("cache", Boolean.class,
 					true));
 			return resolver;
@@ -144,7 +146,15 @@ public class ThymeleafAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnClass({ Servlet.class })
-	protected static class ThymeleafViewResolverConfiguration {
+	protected static class ThymeleafViewResolverConfiguration implements EnvironmentAware {
+
+		private RelaxedPropertyResolver environment;
+
+		@Override
+		public void setEnvironment(Environment environment) {
+			this.environment = new RelaxedPropertyResolver(environment,
+					"spring.thymeleaf.");
+		}
 
 		@Autowired
 		private SpringTemplateEngine templateEngine;
@@ -154,7 +164,8 @@ public class ThymeleafAutoConfiguration {
 		public ThymeleafViewResolver thymeleafViewResolver() {
 			ThymeleafViewResolver resolver = new ThymeleafViewResolver();
 			resolver.setTemplateEngine(this.templateEngine);
-			resolver.setCharacterEncoding("UTF-8");
+			resolver.setCharacterEncoding(this.environment.getProperty("encoding",
+					"UTF-8"));
 			// Needs to come before any fallback resolver (e.g. a
 			// InternalResourceViewResolver)
 			resolver.setOrder(Ordered.LOWEST_PRECEDENCE - 20);

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfigurationTests.java

@@ -34,6 +34,8 @@ import org.thymeleaf.TemplateEngine;
 import org.thymeleaf.context.Context;
 import org.thymeleaf.spring3.view.ThymeleafView;
 import org.thymeleaf.spring3.view.ThymeleafViewResolver;
+import org.thymeleaf.templateresolver.ITemplateResolver;
+import org.thymeleaf.templateresolver.TemplateResolver;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
@@ -63,6 +65,25 @@ public class ThymeleafAutoConfigurationTests {
 		context.close();
 	}
 
+	@Test
+	public void overrideCharacterEncoding() throws Exception {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		context.register(ThymeleafAutoConfiguration.class,
+				PropertyPlaceholderAutoConfiguration.class);
+		Map<String, Object> map = new HashMap<String, Object>();
+		map.put("spring.thymeleaf.encoding", "UTF-16");
+		context.getEnvironment().getPropertySources()
+				.addFirst(new MapPropertySource("test", map));
+		context.refresh();
+		context.getBean(TemplateEngine.class).initialize();
+		ITemplateResolver resolver = context.getBean(ITemplateResolver.class);
+		assertTrue(resolver instanceof TemplateResolver);
+		assertEquals("UTF-16", ((TemplateResolver) resolver).getCharacterEncoding());
+		ThymeleafViewResolver views = context.getBean(ThymeleafViewResolver.class);
+		assertEquals("UTF-16", views.getCharacterEncoding());
+		context.close();
+	}
+
 	@Test
 	public void createLayoutFromConfigClass() throws Exception {
 		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();