Java与xml的相互转化（JaxbUtil）

import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class JaxbUtil
{
   /**
    * JavaBean转换成xml 默认编码UTF-8
    * 
    * @param obj
    * @param writer
    * @return
    */
   public static String convertToXml(Object obj)
   {
      return convertToXml(obj, "UTF-8");
   }

   /**
    * JavaBean转换成xml
    * 
    * @param obj
    * @param encoding
    * @return
    */
   public static String convertToXml(Object obj, String encoding)
   {
      String result =null;
      try
      {
         JAXBContext context =JAXBContext.newInstance(obj.getClass());
         Marshaller marshaller =context.createMarshaller();
         marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
         marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);
         StringWriter writer =new StringWriter();
         marshaller.marshal(obj, writer);
         result =writer.toString();
      }
      catch(Exception e)
      {
         e.printStackTrace();
      }
      return result;
   }

   /**
    * xml转换成JavaBean
    * 
    * @param xml
    * @param c
    * @return
    * @throws JAXBException 
    */
   @SuppressWarnings("unchecked")
   public static  T converyToJavaBean(String xml, Class c) throws JAXBException
   {
      T t =null;
      JAXBContext context =JAXBContext.newInstance(c);
      Unmarshaller unmarshaller =context.createUnmarshaller();
      t =(T)unmarshaller.unmarshal(new StringReader(xml));
      return t;
   }
}