update xmlrootelement annotation

weixin4j-base/src/main/java/com/foxinmy/weixin4j/http/SimpleHttpClient.java

@@ -164,7 +164,9 @@ public class SimpleHttpClient implements HttpClient {
 				if (os != null) {
 					os.close();
 				}
-				is.close();
+				if (is != null) {
+					is.close();
+				}
 			}
 		}
 		HttpResponse response = new HttpResponse();

weixin4j-base/src/main/java/com/foxinmy/weixin4j/http/weixin/XmlResult.java

@@ -5,6 +5,7 @@ import java.io.Serializable;
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
 
 import com.alibaba.fastjson.annotation.JSONField;
 
@@ -17,6 +18,7 @@ import com.alibaba.fastjson.annotation.JSONField;
  * @since JDK 1.7
  * @see
  */
+@XmlRootElement
 @XmlAccessorType(XmlAccessType.FIELD)
 public class XmlResult implements Serializable {
 

weixin4j-base/src/main/java/com/foxinmy/weixin4j/xml/XmlStream.java

@@ -77,14 +77,16 @@ public final class XmlStream {
 			Source source = new StreamSource(content);
 			XmlRootElement rootElement = clazz
 					.getAnnotation(XmlRootElement.class);
-			if (rootElement == null) {
+			if (rootElement == null || rootElement.name().equals(
+					XmlRootElement.class.getMethod("name")
+					.getDefaultValue().toString())) {
 				JAXBElement<T> jaxbElement = unmarshaller.unmarshal(source,
 						clazz);
 				return jaxbElement.getValue();
 			} else {
 				return (T) unmarshaller.unmarshal(source);
 			}
-		} catch (JAXBException e) {
+		} catch (Exception e) {
 			throw new IllegalArgumentException(e);
 		} finally {
 			if (content != null) {
@@ -253,7 +255,10 @@ public final class XmlStream {
 		try {
 			XmlRootElement rootElement = clazz
 					.getAnnotation(XmlRootElement.class);
-			if (rootElement == null) {
+			if (rootElement == null
+					|| rootElement.name().equals(
+							XmlRootElement.class.getMethod("name")
+									.getDefaultValue().toString())) {
 				marshaller.marshal(new JAXBElement<T>(new QName(
 						ROOT_ELEMENT_XML), clazz, t), os);
 			} else {