diff --git a/src/main/java/com/gzzn/omms/msgexchangeapi/service/exchange/ExchangeServiceImpl.java b/src/main/java/com/gzzn/omms/msgexchangeapi/service/exchange/ExchangeServiceImpl.java
index 7fec996c..06e3f470 100644
--- a/src/main/java/com/gzzn/omms/msgexchangeapi/service/exchange/ExchangeServiceImpl.java
+++ b/src/main/java/com/gzzn/omms/msgexchangeapi/service/exchange/ExchangeServiceImpl.java
@@ -1,7 +1,6 @@
 package com.gzzn.omms.msgexchangeapi.service.exchange;
 
 import java.io.IOException;
-import java.util.Map;
 
 import org.springframework.stereotype.Service;
 
@@ -9,9 +8,9 @@ import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.JsonMappingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.type.TypeFactory;
 import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator;
 import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
 import com.gzzn.omms.msgexchangeapi.entity.msg.MSG;
 import com.gzzn.omms.msgexchangeapi.exception.ExchangeServiceException;
@@ -30,7 +29,7 @@ public class ExchangeServiceImpl implements IExchangeService {
 	@Override
 	public  <T>  T  xmlstrToObject(String xml,Class<T> valueType) throws ExchangeServiceException {
 		try {
-			ObjectMapper xmlMapper = new XmlMapper();
+			XmlMapper xmlMapper = new XmlMapper();
 			xmlMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 			xmlMapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector(TypeFactory.defaultInstance()));
 			return xmlMapper.readValue(xml,valueType);
@@ -47,9 +46,9 @@ public class ExchangeServiceImpl implements IExchangeService {
 	public String objectToXmlstr(Object object) throws ExchangeServiceException {
 		
 		try {
-			String xml;
-			ObjectMapper xmlMapper = new XmlMapper();
-			xml = xmlMapper.writeValueAsString(object);
+			XmlMapper xmlMapper = new XmlMapper();
+			xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
+			String xml = xmlMapper.writeValueAsString(object);
 			return xml;
 		} catch (JsonProcessingException e) {
 			throw new ExchangeServiceException(e.getMessage(),e);