DOM4J 生成中文XML出现乱码

1 使用FileWriter写中文xml出现乱码   很怪异。

XMLWriter writer=null;
  try{
   Document doc=DocumentHelper.parseText(result);
   OutputFormat format=OutputFormat.createPrettyPrint();
   format.setEncoding("UTF-8");
         //FileOutputStream fos=new FileOutputStream(new File("C:\\GeoSearchResponse.xml"));
   writer=new XMLWriter(new FileWriter(new File("C:\\GeoSearchResponse.xml")),format);
         //writer=new XMLWriter(fos,format);
   writer.write(doc);
   System.out.println("xml:"+doc.asXML());
  }catch(DocumentException w){
           w.printStackTrace();  
  }catch(IOException i){
   i.printStackTrace();
  }finally{
   if(writer!=null){
    try{
     writer.close();
    }catch(IOException e){
     e.printStackTrace();
    };
    
   };
  }; 

2  经过反复测试和实验   改成FileOutputStream来写  结果良好  

XMLWriter writer=null;
  try{
   Document doc=DocumentHelper.parseText(result);
   OutputFormat format=OutputFormat.createPrettyPrint();
   format.setEncoding("UTF-8");
         FileOutputStream fos=new FileOutputStream(new File("C:\\GeoSearchResponse.xml"));
   //writer=new XMLWriter(new FileWriter(new File("C:\\GeoSearchResponse.xml")),format);
         writer=new XMLWriter(fos,format);
   writer.write(doc);
   System.out.println("xml:"+doc.asXML());
  }catch(DocumentException w){
           w.printStackTrace();  
  }catch(IOException i){
   i.printStackTrace();
  }finally{
   if(writer!=null){
    try{
     writer.close();
    }catch(IOException e){
     e.printStackTrace();
    };
    
   };
  };