private File pictureType;    private String pictureTypeContentType;    private String pictureTypeFileName;public String editType() throws IOException{        Type t=typeService.find(Type.class, id);        System.out.println("id="+id);        System.out.println(UploadPath);        System.out.println(pictureTypeFileName);        File saved=new File(UploadPath+Constants.TypeDir, t.getId()+"."+pictureTypeContentType.split("/")[1]);        InputStream ins=null;        OutputStream ous=null;        try {            saved.getParentFile().mkdirs();            ins=new FileInputStream(pictureType);            ous=new FileOutputStream(saved);            byte[] b=new byte[1024];            int len=0;            while((len=ins.read(b))!=-1){                ous.write(b, 0, len);            }        } catch (Exception e) {            e.printStackTrace();        }finally{            if(ous!=null){                ous.close();            }            if(ins!=null){                ins.close();            }            t.setPicUrl(Constants.TypeDir+"/"+t.getId()+"."                    + pictureTypeContentType.split("/")[1]);            typeService.save(t);        }        return SUCCESS;    }

<s:form action="editType_manage" enctype="multipart/form-data">        <s:file label="修改商店图片" name="pictureType"></s:file>        <s:submit value="确认修改" />    </s:form>