From 95b9325222cc42e5800fc5cc8640f9478aab69be Mon Sep 17 00:00:00 2001
From: langfr <frank.langelage@outlook.de>
Date: Wed, 8 Oct 2025 11:29:54 +0100
Subject: [PATCH] Use UTF-8 when creating new Strings from byte[].

---
 Release_Notes.md                              |  2 +-
 .../ZUGFeRD/DAPullProvider.java               |  2 +-
 .../ZUGFeRD/OXPullProvider.java               |  2 +-
 .../ZUGFeRD/UBLDAPullProvider.java            |  2 +-
 .../ZUGFeRD/ZUGFeRD1PullProvider.java         |  2 +-
 .../ZUGFeRD/ZUGFeRD2PullProvider.java         |  4 +--
 .../ZUGFeRD/ZUGFeRDImporter.java              |  3 +-
 .../ZUGFeRD/ZUGFeRDInvoiceImporter.java       |  2 +-
 .../ZUGFeRD/CalculationTest.java              |  5 ++--
 .../ZUGFeRD/DeSerializationTest.java          |  6 ++--
 .../mustangproject/ZUGFeRD/ZF2PushTest.java   | 30 +++++++++----------
 .../org/mustangproject/ZUGFeRD/ZF2Test.java   |  3 +-
 .../validator/ZUGFeRDValidator.java           |  2 +-
 13 files changed, 34 insertions(+), 31 deletions(-)

diff --git a/Release_Notes.md b/Release_Notes.md
index 11b0040c..b4d273ee 100644
--- a/Release_Notes.md
+++ b/Release_Notes.md
@@ -166,7 +166,7 @@ can be used to get XML
 ```
 ZUGFeRD2PullProvider zf2p = new ZUGFeRD2PullProvider();
 zf2p.generateXML(i);
-String theXML = new String(zf2p.getXML());
+String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 ```
 or can also be used with setTransaction to generate invoice PDFs straight away.
 ### Embedding ZF1 to ZF2 migration
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/DAPullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/DAPullProvider.java
index 9bac1b07..a3410681 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/DAPullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/DAPullProvider.java
@@ -182,7 +182,7 @@ public class DAPullProvider extends ZUGFeRD2PullProvider {
 		// Additional Documents of XRechnung (Rechnungsbegruendende Unterlagen - BG-24 XRechnung)
 		if (trans.getAdditionalReferencedDocuments() != null) {
 			for (final FileAttachment f : trans.getAdditionalReferencedDocuments()) {
-				final String documentContent = new String(Base64.getEncoder().encodeToString(f.getData()));
+				final String documentContent = Base64.getEncoder().encodeToString(f.getData());
 				xml += "<ram:AdditionalReferencedDocument>"
 						+ "<ram:IssuerAssignedID>" + f.getFilename() + "</ram:IssuerAssignedID>"
 						+ "<ram:TypeCode>916</ram:TypeCode>"
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/OXPullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/OXPullProvider.java
index f2a032f2..6fb384dc 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/OXPullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/OXPullProvider.java
@@ -257,7 +257,7 @@ public class OXPullProvider extends ZUGFeRD2PullProvider {
 		// Additional Documents of XRechnung (Rechnungsbegruendende Unterlagen - BG-24 XRechnung)
 		if (trans.getAdditionalReferencedDocuments() != null) {
 			for (final FileAttachment f : trans.getAdditionalReferencedDocuments()) {
-				final String documentContent = new String(Base64.getEncoder().encodeToString(f.getData()));
+				final String documentContent = Base64.getEncoder().encodeToString(f.getData());
 				xml += "<ram:AdditionalReferencedDocument>"
 						+ "<ram:IssuerAssignedID>" + f.getFilename() + "</ram:IssuerAssignedID>"
 						+ "<ram:TypeCode>916</ram:TypeCode>"
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/UBLDAPullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/UBLDAPullProvider.java
index 128af5d2..3e39c51b 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/UBLDAPullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/UBLDAPullProvider.java
@@ -117,7 +117,7 @@ public class UBLDAPullProvider implements IXMLProvider {
 		final StringWriter sw = new StringWriter();
 		Document document = null;
 		try {
-			document = DocumentHelper.parseText(new String(ublData));
+			document = DocumentHelper.parseText(new String(ublData, StandardCharsets.UTF_8));
 		} catch (final DocumentException e1) {
 			LOGGER.error ("Failed to parse UBL", e1);
 		}
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD1PullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD1PullProvider.java
index 87e6f479..12fe60a7 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD1PullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD1PullProvider.java
@@ -91,7 +91,7 @@ public class ZUGFeRD1PullProvider extends ZUGFeRD2PullProvider {
 		final StringWriter sw = new StringWriter();
 		Document document = null;
 		try {
-			document = DocumentHelper.parseText(new String(zugferdData));
+			document = DocumentHelper.parseText(new String(zugferdData, StandardCharsets.UTF_8));
 		} catch (final DocumentException e1) {
 			LOGGER.error ("Failed to parse ZUGFeRD data", e1);
 		}
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
index 87ffb274..b67beecc 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
@@ -95,7 +95,7 @@ public class ZUGFeRD2PullProvider implements IXMLProvider {
 		final StringWriter sw = new StringWriter();
 		Document document = null;
 		try {
-			document = DocumentHelper.parseText(new String(zugferdData));
+			document = DocumentHelper.parseText(new String(zugferdData, StandardCharsets.UTF_8));
 		} catch (final DocumentException e1) {
 			LOGGER.error("Failed to parse ZUGFeRD data", e1);
 		}
@@ -620,7 +620,7 @@ public class ZUGFeRD2PullProvider implements IXMLProvider {
 		// Additional Documents of XRechnung (Rechnungsbegruendende Unterlagen - BG-24 XRechnung)
 		if (trans.getAdditionalReferencedDocuments() != null) {
 			for (final FileAttachment f : trans.getAdditionalReferencedDocuments()) {
-				final String documentContent = new String(Base64.getEncoder().encodeToString(f.getData()));
+				final String documentContent = Base64.getEncoder().encodeToString(f.getData());
 				xml += "<ram:AdditionalReferencedDocument>"
 					+ "<ram:IssuerAssignedID>" + f.getFilename() + "</ram:IssuerAssignedID>"
 					+ "<ram:TypeCode>916</ram:TypeCode>"
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDImporter.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDImporter.java
index 7de7415e..3f2cd02d 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDImporter.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDImporter.java
@@ -14,6 +14,7 @@ package org.mustangproject.ZUGFeRD;
  * @author jstaerk
  */
 import java.io.*;
+import java.nio.charset.StandardCharsets;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.*;
@@ -479,7 +480,7 @@ public class ZUGFeRDImporter extends ZUGFeRDInvoiceImporter {
 			return null;
 		}
 
-		return new String(rawXML);
+		return new String(rawXML, StandardCharsets.UTF_8);
 	}
 
 
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
index cdfe1d29..3b819ece 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
@@ -1223,7 +1223,7 @@ public class ZUGFeRDInvoiceImporter {
 			return null;
 		}
 		if (rawXML.length < 3) {
-			return new String(rawXML);
+			return new String(rawXML, StandardCharsets.UTF_8);
 		}
 
 
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
index 680b312e..a26eb2e0 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
@@ -17,6 +17,7 @@ import javax.xml.transform.Source;
 import javax.xml.xpath.XPathExpressionException;
 import java.io.*;
 import java.math.BigDecimal;
+import java.nio.charset.StandardCharsets;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
@@ -292,7 +293,7 @@ public class CalculationTest extends ResourceCase {
 		zf2p.generateXML(invoice);
 
 
-		String theXML = new String(zf2p.getXML());
+		String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 		assertThat(theXML).valueByXPath("//*[local-name()='ActualAmount']")
 			.asString()
 			.isEqualTo("0.55");// test for issue #917
@@ -346,7 +347,7 @@ public class CalculationTest extends ResourceCase {
 		zf2p.generateXML(invoice);
 
 
-		String theXML = new String(zf2p.getXML());
+		String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 		assertThat(theXML).valueByXPath("//*[local-name()='ActualAmount']")
 			.asString()
 			.isEqualTo("0.55");// test for issue #917
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/DeSerializationTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/DeSerializationTest.java
index 6f0a910c..dc158a68 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/DeSerializationTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/DeSerializationTest.java
@@ -300,7 +300,7 @@ public class DeSerializationTest extends ResourceCase {
 			ZUGFeRD2PullProvider zf2p = new ZUGFeRD2PullProvider();
 			zf2p.setProfile(Profiles.getByName("XRechnung"));
 			zf2p.generateXML(newInvoiceFromJSON);
-			String theXML = new String(zf2p.getXML());
+			String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<udt:DateTimeString format=\"102\">20180304</udt:DateTimeString>"));
 			assertTrue(theXML.contains(base64));
 
@@ -539,7 +539,7 @@ public class DeSerializationTest extends ResourceCase {
 		ZUGFeRD2PullProvider zf2p = new ZUGFeRD2PullProvider();
 		zf2p.setProfile(Profiles.getByName("XRechnung"));
 		zf2p.generateXML(fromJSON);
-		String theXML = new String(zf2p.getXML());
+		String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 		assertTrue(theXML.contains("<udt:DateTimeString format=\"102\">20241026</udt:DateTimeString>"));
 
 	}
@@ -920,7 +920,7 @@ public class DeSerializationTest extends ResourceCase {
 			ZUGFeRD2PullProvider zf2p = new ZUGFeRD2PullProvider();
 			zf2p.setProfile(Profiles.getByName("XRechnung"));
 			zf2p.generateXML(fromJSON);
-			theXML = new String(zf2p.getXML());
+			theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 		} catch (Exception e) {
 			exceptions = true;
 		}
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2PushTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2PushTest.java
index 72a4127f..1defb4b3 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2PushTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2PushTest.java
@@ -162,7 +162,7 @@ public class ZF2PushTest extends TestCase {
 				.setNumber(number)
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(0)).setTaxExemptionReason("Kleinunternehmer gemäß §19 UStG").setTaxCategoryCode("E"), price, new BigDecimal(1.0)).addNote(theNote))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_ATTACHMENTSPDF);
 		} catch (IOException e) {
@@ -222,7 +222,7 @@ public class ZF2PushTest extends TestCase {
 				.setNumber(number)
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, new BigDecimal(1.0)))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			Invoice read = new Invoice();
 			ZUGFeRDInvoiceImporter zii = new ZUGFeRDInvoiceImporter(new ByteArrayInputStream(theXML.getBytes(StandardCharsets.UTF_8)));
 			zii.extractInto(read);
@@ -266,7 +266,7 @@ public class ZF2PushTest extends TestCase {
 			ze.setTransaction(i);
 
 
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_ITEMGROSS);
 		} catch (IOException e) {
@@ -332,7 +332,7 @@ public class ZF2PushTest extends TestCase {
 			ze.setTransaction(i);
 
 
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_ITEMCHARGESALLOWANCESPDF);
 		} catch (IOException e) {
@@ -387,7 +387,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)).setIntraCommunitySupply(), price, new BigDecimal(1.0)))
 			);
 
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_INTRACOMMUNITYSUPPLYPDF);
 		} catch (IOException e) {
@@ -439,7 +439,7 @@ public class ZF2PushTest extends TestCase {
 				.setNumber(number)
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(0)).setTaxExemptionReason("Kein Ausweis der Umsatzsteuer bei innergemeinschaftlichen Lieferungen").setTaxCategoryCode("K"), price, new BigDecimal(1.0)))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_INTRACOMMUNITYSUPPLYMANUALPDF);
 		} catch (IOException e) {
@@ -500,7 +500,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)).setReverseCharge(), price, new BigDecimal(1.0)))
 			);
 
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_REVERSECHARGEPDF);
 		} catch (IOException e) {
@@ -547,7 +547,7 @@ public class ZF2PushTest extends TestCase {
 				.addCharge(new Charge(new BigDecimal(0.5)).setTaxPercent(new BigDecimal(19)).setReasonCode("ABK"))
 				.addAllowance(new Allowance(new BigDecimal(0.2)).setTaxPercent(new BigDecimal(19)).setReasonCode("ABK"))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_CHARGESALLOWANCESPDF);
 		} catch (IOException e) {
@@ -615,7 +615,7 @@ public class ZF2PushTest extends TestCase {
 				e.printStackTrace();
 			}
 
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_PUSHEDGE);
 		} catch (IOException e) {
@@ -698,7 +698,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)).addAllowance(new Allowance(BigDecimal.ONE)), new BigDecimal(500.0), qty).addAllowance(new Allowance(new BigDecimal(300)).setTaxPercent(new BigDecimal(19))))
 				.addAllowance(new Allowance(new BigDecimal(600)).setTaxPercent(new BigDecimal(19)))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_ALLOWANCESPDF);
 		} catch (IOException e) {
@@ -744,7 +744,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, new BigDecimal(1.0))).addCharge(new Charge().setPercent(new BigDecimal(50)).setTaxPercent(new BigDecimal(19)).setReasonCode("ABK"))
 						.addAllowance(new Allowance().setPercent(new BigDecimal(50)).setTaxPercent(new BigDecimal(19)).setReason("Mengenrabatt"))
 			);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_RELATIVECHARGESALLOWANCESPDF);
 		} catch (IOException e) {
@@ -794,7 +794,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, qty))
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, qty)).setCorrection("0815");
 			ze.setTransaction(i);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_CORRECTIONPDF);
 		} catch (IOException e) {
@@ -845,7 +845,7 @@ public class ZF2PushTest extends TestCase {
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, qty))
 				.addItem(new Item(new Product("Testprodukt", "", "H87", new BigDecimal(19)), price, qty)).setCreditNote();
 			ze.setTransaction(i);
-			String theXML = new String(ze.getProvider().getXML());
+			String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_CREDITNOTEPDF);
 		} catch (IOException e) {
@@ -905,7 +905,7 @@ public class ZF2PushTest extends TestCase {
 			.setInvoiceReferencedDocumentID("");
 
 		zf2p.generateXML(i);
-		String theXML = new String(zf2p.getXML());
+		String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 
 		assertFalse(theXML.contains("<ram:SellerOrderReferencedDocument"));
 		assertFalse(theXML.contains("<ram:BuyerOrderReferencedDocument"));
@@ -921,7 +921,7 @@ public class ZF2PushTest extends TestCase {
 			.setInvoiceReferencedDocumentID("     ");
 
 		zf2p.generateXML(i);
-		theXML = new String(zf2p.getXML());
+		theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
 
 		assertFalse(theXML.contains("<ram:SellerOrderReferencedDocument"));
 		assertFalse(theXML.contains("<ram:BuyerOrderReferencedDocument"));
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2Test.java b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2Test.java
index d945c770..1fae7e31 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2Test.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2Test.java
@@ -24,6 +24,7 @@ package org.mustangproject.ZUGFeRD;
 import java.io.IOException;
 import java.io.InputStream;
 import java.math.BigDecimal;
+import java.nio.charset.StandardCharsets;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
@@ -175,7 +176,7 @@ public class ZF2Test extends MustangReaderTestCase {
 				 .load(SOURCE_PDF)) {
 
 			ze.setTransaction(this);
-			final String theXML = new String(ze.getProvider().getXML());
+			final String theXML = new String(ze.getProvider().getXML(), StandardCharsets.UTF_8);
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
 			ze.export(TARGET_PDF);
 		} catch (final IOException e) {
diff --git a/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java b/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
index e162edd9..71bbdab3 100644
--- a/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
+++ b/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
@@ -301,7 +301,7 @@ public class ZUGFeRDValidator {
 		StringWriter sw = new StringWriter();
 		org.dom4j.Document document = null;
 		try {
-			document = DocumentHelper.parseText(new String(finalStringResult));
+			document = DocumentHelper.parseText(finalStringResult.toString());
 		} catch (DocumentException e1) {
 			LOGGER.error(e1.getMessage());
 		}