webwork 批改图片报错

webwork 修改图片报错

webwork上传图片，没有选择，表单VO 获取不到值，或
String testFck = ServletActionContext.getRequest().getParameter("testFck");
获取为空

添加上传图片，则没有错
即：<input type="file" name="files" id="upload" size="15" />
必须赋值，但是业务需求，有时候不需要更改头像，则无法完成
解决方案：动态创建表单
 function uploadPhoto()
	{
		var TEMP = '<input type=\"file\" name="files" id=\"upload\" size=\"15\" /><input type=\"button\" name="btn" id=\"btn\" value=\"取消\" onclick=\"quxiao()\"/>';
		document.getElementById('uploadPhoto').innerHTML = TEMP;
	}
 function quxiao()
 {
	document.getElementById('uploadPhoto').innerHTML = '';
 }
 
 JSP

 <a href ="#" onclick="uploadPhoto()"><img src="<%=path %>/upload/<ww:property value = "#request['MAVIN'].expertPhoto" />" width="80" height="60" /></a>
	<div id="uploadPhoto"></div><span>点击修改图片</span>
 </td>

 ACTION

 
	System.out.println("***********修改保存专家信息***********");
	TbExpertVO expertVO = new TbExpertVO();
	//获取 FCK 内容
	long mavinId = expert.getExpertId();
	String testFck = ServletActionContext.getRequest().getParameter("testFck");
	System.out.println("testFck = "+ testFck);
	expertVO.setExpertId(mavinId);
	expertVO.setExpertInfor(testFck);
	expertVO.setExpertName(expert.getExpertName());
	expertVO.setExpertOnline(expert.getExpertOnline());
//		文件上传处理
	String destPathString =  "";
	String fileName = "";
	if(files != null)
	{
		File file = files[0]; // 第一个图片 - one
//			保证图片名唯一
		String tName = filesFileName[0];
		System.out.println("文件上传原图片名字："+tName);
		String endPhoto = tName.substring(tName.lastIndexOf("."),tName.length()).toLowerCase();
//			处理中文图片名字不显示
		String fn = String.valueOf(System.currentTimeMillis()+filesFileName[0].hashCode());
		System.out.println("中文处理后的图片名字："+fn);
		System.out.println("保存的图片："+fn+" "+endPhoto);
		fileName = fn+endPhoto;
		//文件转移到 upload 下面
		destPathString = ServletActionContext.getRequest().getRealPath("upload")+File.separator+fileName;
		System.out.println("临时文件的保存路径:"+file.getPath()+"\n"+"图片保存路径:"+destPathString);
		FileUtilTwo c = new FileUtilTwo(file.getPath(), destPathString);
		c.doCopy();
	}
	
	if (!fileName.equals("")) 
	{
		expertVO.setExpertPhoto(fileName);
//			图片压缩处理 - 小图片 small_ xx name
		ImageCompressHead ic = new ImageCompressHead();
		ic.setImageSmall(destPathString);
	}
	try {
		mavinService.modifyUpdateMavin(expertVO);
	} catch (BOException e) {
		e.printStackTrace();
	}
	
//		查询对象 返回 修改 新页面
	TbExpert mavin = new TbExpert();
	try {
		mavin = mavinService.editMavin(String.valueOf(mavinId));
	} catch (BOException e) {
		e.printStackTrace();
	}
	try {
		Clob clob = mavin.getExpertInfor();
		String FCK = IOUtils.toString(clob.getCharacterStream());
		ServletActionContext.getRequest().setAttribute("FCK",FCK);
	} catch (IOException e) {
		e.printStackTrace();
	} catch (SQLException e) {
		e.printStackTrace();
	}
	ServletActionContext.getRequest().setAttribute("MAVIN",mavin);
	ServletActionContext.getRequest().setAttribute("SAVE_SUCCESS","SAVE_SUCCESS");
	return SUCCESS;