OZG-723 fix Forwarding Mail encoding

pluto-server/pom.xml

@@ -33,6 +33,8 @@
 
 		<zip.version>2.7.0</zip.version>
 		<jsoup.version>1.13.1</jsoup.version>
+
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 	</properties>
 
 	<dependencies>

pluto-server/run_local.sh

-mvn spring-boot:run -Dspring-boot.run.profiles=local
+./mvnw spring-boot:run -Dspring-boot.run.profiles=local

pluto-server/src/main/java/de/itvsh/ozg/pluto/BeansConfig.java

+package de.itvsh.ozg.pluto;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
+
+@Configuration
+public class BeansConfig {
+
+	@Bean
+	public FreeMarkerConfigurer freeMarkerConfigurer() {
+		FreeMarkerConfigurer freeMarkerConfigurer = new FreeMarkerConfigurer();
+		freeMarkerConfigurer.setTemplateLoaderPath("classpath:/templates");
+		freeMarkerConfigurer.setDefaultEncoding("UTF-8");
+		return freeMarkerConfigurer;
+	}
+}

pluto-server/src/main/java/de/itvsh/ozg/pluto/vorgang/redirect/ForwardingService.java

 package de.itvsh.ozg.pluto.vorgang.redirect;
 
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.OutputStreamWriter;
+import java.io.StringWriter;
 import java.time.ZoneOffset;
 import java.time.ZonedDateTime;
 import java.util.HashMap;
@@ -18,6 +17,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.stereotype.Service;
 import org.springframework.util.MimeTypeUtils;
+import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
 
 import de.itvsh.ozg.mail.email.MailSendRequest;
 import de.itvsh.ozg.mail.email.MailSendRequest.MailAttachment;
@@ -28,7 +28,6 @@ import de.itvsh.ozg.pluto.common.util.ForwardingLandesnetzInfoService;
 import de.itvsh.ozg.pluto.vorgang.Vorgang;
 import de.itvsh.ozg.pluto.vorgang.VorgangService;
 import de.itvsh.ozg.pluto.vorgang.redirect.Forwarding.Status;
-import freemarker.template.Configuration;
 import freemarker.template.Template;
 import freemarker.template.TemplateException;
 
@@ -62,7 +61,7 @@ public class ForwardingService {
 	private ForwardingRepository repository;
 
 	@Autowired
-	private Configuration freemarkerCfg;
+	private FreeMarkerConfigurer freemarkerCfg;
 
 	@Autowired
 	private MailService emailService;
@@ -225,9 +224,12 @@ public class ForwardingService {
 	}
 
 	private String fillTemplate(String templateName, Object dataModel) {
-		try (var outStream = new ByteArrayOutputStream(); var writer = new OutputStreamWriter(outStream)) {
-			getTemplate(templateName).process(dataModel, writer);
-			return new String(outStream.toByteArray());
+		try {
+			Template template = getTemplate(templateName);
+			StringWriter stringWriter = new StringWriter();
+			template.process(dataModel, stringWriter);
+			return stringWriter.toString();
+
 		} catch (IOException | TemplateException e) {
 			throw new TechnicalException("Error filling mail template", e);
 		}
@@ -235,7 +237,7 @@ public class ForwardingService {
 
 	Template getTemplate(String templateName) {
 		try {
-			return freemarkerCfg.getTemplate(templateName);
+			return freemarkerCfg.getConfiguration().getTemplate(templateName);
 		} catch (IOException e) {
 			throw new TechnicalException("Error loading mail template", e);
 		}