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Form表单提交后获取下载文件到服务器以及获取文件之外的参数数据

ServletDemo类:

@MultipartConfig@WebServlet("/ServletDemo")public class ServletDemo  extends HttpServlet {
       @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
           super.doGet(req, resp);    }        @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
           //获取文件之外的参数，前提是ServletDemo配置了@MultipartConfig        System.out.println(req.getParameter("name"));        //获取上传文件的组件        Part part = req.getPart("file");        //获取文件信息        String fileInfo= part.getHeader("content-disposition");        //fileInfo为form-data; name="file"; filename="a.png"        char[] chars = fileInfo.toCharArray();        String filename  = "";        int index = fileInfo.length()-2;        while(chars[index]!='\"'){
               filename = chars[index]+filename;            index--;        }        InputStream input= part.getInputStream();        FileOutputStream output= new FileOutputStream("D:\\IDEA_Workspace\\SSM\\src\\images\\"+filename);        BufferedInputStream inputStream = new BufferedInputStream(input);        BufferedOutputStream outputStream = new BufferedOutputStream(output);        int len;        byte[] bytes = new byte[1024];        while((len=inputStream.read(bytes))!=-1){
               System.out.println(len);            outputStream.write(bytes,0,len);        }        //注意一定要flush一下否则无法完整写入        outputStream.flush();        inputStream.close();        outputStream.close();    }}

表单提交html文件:

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