Struts2 action返回图片流

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备用：

struts.xml代码：

<action name="getDocumentImg" class="JcOffDocumentAction" method="getDocumentImg"><!-- 获取文档图片流 --><result type="stream">         <param name="contentType">image/jpeg</param>         <param name="inputName">inputStream</param>     </result>  </action>

action类代码：

/** * 获取图片流 * @return */public String getDocumentImg() {model = (JcOffDocument)baseBO.load(model);String imgUrl = getAllPath(model);//String imgUrl = "/jczfoa/images/aa.jpg";if(!MyUtils.isFileExist(imgUrl, "")){//如果指定的图片不存在，显示默认图片imgUrl = getSession().getServletContext().getRealPath("/")+"images"+File.separator+"zw.jpg";}try {ByteArrayOutputStream bos = new ByteArrayOutputStream();InputStream input = new BufferedInputStream(new FileInputStream(imgUrl));byte[] bt = new byte[1024];while (input.read(bt) > 0) {bos.write(bt);}this.inputStream = new ByteArrayInputStream(bos.toByteArray());bos.close();input.close();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return SUCCESS;}private ByteArrayInputStream inputStream;public ByteArrayInputStream getInputStream() {return inputStream;}public void setInputStream(ByteArrayInputStream inputStream) {this.inputStream = inputStream;}