一、文件上传（commons-fileupload-1.2.1.jar和commons-io-2.0.jar）
创新互联公司-专业网站定制、快速模板网站建设、高性价比江阴网站开发、企业建站全套包干低至880元,成熟完善的模板库,直接使用。一站式江阴网站制作公司更省心,省钱,快速模板网站建设找我们，业务覆盖江阴地区。费用合理售后完善，十载实体公司更值得信赖。
public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
fileItemFactory.setSizeThreshold(1024*10);
fileItemFactory.setRepository(new File("d:\\tmp"));
ServletFileUpload servletFileUpload = new ServletFileUpload(fileItemFactory);
servletFileUpload.setSizeMax(1024*1000);
try {
List lists = servletFileUpload.parseRequest(httpServletRequest);
if(lists!=null){
for(FileItem fileItem : lists){
if(fileItem.isFormField()){
String fieldName = fileItem.getFieldName();
String fieldValue = fileItem.getString();
}else{
InputStream inputStream = fileItem.getInputStream();
String fileName = fileItem.getName();
byte[] b = new byte[1024];
int len=0;
FileOutputStream fileOutputStream = new FileOutputStream("d:\\"+fileName);
while((len=inputStream.read(b))!=-1){
fileOutputStream.write(b, 0, len);
}
fileOutputStream.close();
inputStream.close();
}
}
}
} catch (FileUploadException e) {
e.printStackTrace();
}
}文件下载
public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
httpServletResponse.setContentType("application/x-msdownload");
String fileName = "爱情码头郑源.mp3";
httpServletResponse.setHeader("Content-Disposition",
"p_w_upload;filename=" + URLEncoder.encode(fileName, "UTF-8"));
OutputStream outputStream = response.getOutputStream();
InputStream inputStream = new FileInputStream("F:\\音乐\\" + fileName);
byte[] b = new byte[1024];
int len = 0;
while((len=inputStream.read(b))!=-1){
outputStream.write(b, 0, len);
}
inputStream.close();
} 附件：http://down.51cto.com/data/2366514
另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。
本文名称：文件上传和下载-创新互联
文章来源：
http://cdkjz.cn/article/coeddg.html
