struts2实现文件上传下载

/** * 上传文件代码 */public class UploadAndDownloadAction extends ActionSupport{ ????// 获取文件 ???private File myFile; ???// 获取文件的名称 ???private String myFileFileName; ???// 获取文件的类型 ???private String myFileContentType; ???public File getMyFile() { ???????return myFile; ???} ???public void setMyFile(File myFile) { ???????this.myFile = myFile; ???} ???public String getMyFileFileName() { ???????return myFileFileName; ???} ???public void setMyFileFileName(String myFileFileName) { ???????this.myFileFileName = myFileFileName; ???} ???public String getMyFileContentType() { ???????return myFileContentType; ???} ???public void setMyFileContentType(String myFileContentType) { ???????this.myFileContentType = myFileContentType; ???} ???????????public boolean upload() { ???????????????????????// 1.确定上传的文件保存的位置 ????????????String uploadRootPath = "/common/download/template"; ????????????String dir = Struts2Util.getRequest().getRealPath(uploadRootPath); ???????????// 2.判断这个文件夹是否存在，不存在创建 ???????????File file = new File(dir); ???????????if (!file.exists()) { ???????????????file.mkdir(); ???????????} ???????????// 3.将文件放到InputStream里面，然后outputstream写入文件 ???????????InputStream is = null; ???????????OutputStream os = null; ???????????try { ???????????????is = new BufferedInputStream(new FileInputStream(myFile)); ???????????????os = new BufferedOutputStream(new FileOutputStream(dir + "\\" + myFileFileName)); ???????????????byte[] buffer = new byte[1024]; ???????????????int byteLen = 0; ???????????????while ((byteLen = is.read(buffer)) > 0) { ???????????????????os.write(buffer, 0, byteLen); ???????????????} ???????????????domain.setTemplateName(myFileFileName); ???????????????domain.setTemplateUrl(uploadRootPath+ "\\" + myFileFileName); ???????????????domain.setTemplateFullPath(dir+ "\\" + myFileFileName); ???????????????????????????} catch (Exception e) { ???????????????????????????} finally { ???????????????if (is != null) { ???????????????????try { ???????????????????????is.close(); ???????????????????} catch (IOException e) { ???????????????????} ???????????????} ???????????????if (os != null) { ???????????????????try { ???????????????????????os.close(); ???????????????????} catch (IOException e) { ???????????????????} ???????????????} ???????????} ???????????return true; ???????}}

/** * ?文件下载 */public class UploadAndDownloadAction extends ActionSupport ?{ ????????????private String fileName; ???????public String getFileName() { ????????try{ ????????????fileName = URLEncoder.encode(fileName,"UTF-8"); ????????}catch(Exception e){ ????????????throw new RuntimeException(); ????????} ?????????????????return fileName; ???} ???public void setFileName(String fileName) { ???????this.fileName = fileName; ???} ????????//2.3：返回流的方法 下载 ????public InputStream getAttrInputStream() throws ItsException, UnsupportedEncodingException{ ????????String fileName=Struts2Util.getRequest().getParameter("fileName"); ????????????this.setFileName(fileName); ????????????InputStream is=ServletActionContext.getServletContext().getResourceAsStream("路径"); ????????????return is; ????????}else{ ????????????return null; ????????} ????} ??????????????public String getDownloadFile() throws ItsException { ????????return "success"; ????} ?????????/** ?????* ?struts2 配置 ?????*/ ????<action name="uploadAndDownload*" class="uploadAndDownloadAction" method="{1}"> ???????????<result name="uploadTemplate">/common/download/jsp/uploadTemplate.jsp</result> ???????????<!-- 下载操作 --> ?????????????<result name="success" type="stream"> ????????????????<param name="contentType">application/octet-stream</param> ????????????????<param name="inputName">attrInputStream</param> ????????????????<param name="contentDisposition">attachment;filename="${fileName}"</param> ????????????????<param name="bufferSize">1024</param> ???????????????????????</result> ???</action>}

/** * 删除文件 */public static boolean delete(String path) { ???File file = new File(path); ???if (!file.exists()) { ???????return false; ???}else{ ???????return deleteFile(path); ???}}/** * 删除文件 */public static boolean deleteFile(String path) { ???File file = new File(path); ???// 如果文件路径所对应的文件存在，并且是一个文件，则直接删除 ???if (file.delete()) { ???????return true; ???}else { ???????return false; ???}}