toString function takes default charset as second argument

reactome/src/main/java/lcsb/mapviewer/reactome/utils/ReactomeConnector.java

@@ -7,6 +7,7 @@ import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -15,9 +16,9 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-import lcsb.mapviewer.common.XmlParser;
 import org.apache.commons.io.IOUtils;
-import org.apache.logging.log4j.*;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.w3c.dom.Document;
@@ -31,6 +32,7 @@ import lcsb.mapviewer.annotation.services.ExternalServiceStatus;
 import lcsb.mapviewer.annotation.services.ExternalServiceStatusType;
 import lcsb.mapviewer.common.HttpConnectionMethodType;
 import lcsb.mapviewer.common.MimeType;
+import lcsb.mapviewer.common.XmlParser;
 import lcsb.mapviewer.common.exception.InvalidArgumentException;
 import lcsb.mapviewer.common.exception.InvalidXmlSchemaException;
 import lcsb.mapviewer.model.map.MiriamData;
@@ -636,7 +638,7 @@ public class ReactomeConnector extends CachableInterface implements DataSourceUp
 		int responseCode = con.getResponseCode();
 		logger.debug("Response Code : " + responseCode);
 
-		String result = IOUtils.toString(con.getInputStream());
+		String result = IOUtils.toString(con.getInputStream(),StandardCharsets.UTF_8);
 		logger.debug(result);
 		return result;
 	}

rest-api/src/main/java/lcsb/mapviewer/api/convert/ConvertRestImpl.java

@@ -6,6 +6,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -14,7 +15,8 @@ import java.util.Map;
 import javax.xml.stream.XMLStreamException;
 
 import org.apache.commons.io.IOUtils;
-import org.apache.logging.log4j.*;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.sbml.jsbml.SBMLException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -22,9 +24,9 @@ import org.springframework.transaction.annotation.Transactional;
 import lcsb.mapviewer.api.BaseRestImpl;
 import lcsb.mapviewer.api.QueryException;
 import lcsb.mapviewer.common.Pair;
+import lcsb.mapviewer.converter.Converter;
 import lcsb.mapviewer.converter.ConverterException;
 import lcsb.mapviewer.converter.ConverterParams;
-import lcsb.mapviewer.converter.Converter;
 import lcsb.mapviewer.converter.InvalidInputDataExecption;
 import lcsb.mapviewer.converter.graphics.AbstractImageGenerator;
 import lcsb.mapviewer.converter.graphics.DrawingException;
@@ -37,7 +39,6 @@ import lcsb.mapviewer.services.SecurityException;
 @Service
 public class ConvertRestImpl extends BaseRestImpl {
 	
-	  @SuppressWarnings("unused")
 	  private Logger logger = LogManager.getLogger(ConvertRestImpl.class);
 
 
@@ -50,7 +51,7 @@ public class ConvertRestImpl extends BaseRestImpl {
 	  Model model = getModelParserByNameOrClass(fromFormat).createModel(params);
 	  
 	  Converter exporter =  getModelParserByNameOrClass(toFormat);
-	  return IOUtils.toString(exporter.model2InputStream(model));
+	  return IOUtils.toString(exporter.model2InputStream(model), StandardCharsets.UTF_8);
   }
   
   public ByteArrayOutputStream converToImage(String token, String fromFormat, String toFormat, String input,