german decimal separator forced

src/main/java/de/jottyfan/camporganizer/module/confirmation/board/List2CSVService.java

@@ -3,7 +3,9 @@ package de.jottyfan.camporganizer.module.confirmation.board;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.util.Formatter;
 import java.util.List;
+import java.util.Locale;
 
 import org.springframework.stereotype.Service;
 
@@ -24,7 +26,7 @@ public class List2CSVService {
 	}
 
 	private StringBuilder append(StringBuilder buf, Double d) {
-		return buf.append(d == null ? SEP : String.format("%.2f%s", d, SEP));
+		return buf.append(d == null ? SEP : new Formatter(Locale.GERMAN).format("%.2f%s", d, SEP));
 	}
 
 	private StringBuilder append(StringBuilder buf, Boolean b) {