转自: http://blog.csdn.net/jackfrued/article/details/44931137
上传页面
<%@ page pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Photo Upload</title> </head> <body> <h1>Select your photo and upload</h1> <hr/> <div style="color:red;font-size:14px;">${hint}</div> <form action="UploadServlet" method="post" enctype="multipart/form-data"> Photo file: <input type="file" name="photo" /> <input type="submit" value="Upload" /> </form> </body> </html>
支持上传的Servlet：
package com.jackfrued.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.MultipartConfig; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Part; @WebServlet("/UploadServlet") @MultipartConfig public class UploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 可以用request.getPart()方法获得名为photo的上传附件 // 也可以用request.getParts()获得所有上传附件（多文件上传） // 然后通过循环分别处理每一个上传的文件 Part part = request.getPart("photo"); if (part != null && part.getSubmittedFileName().length() > 0) { // 用ServletContext对象的getRealPath()方法获得上传文件夹的绝对路径 String savePath = request.getServletContext().getRealPath("/upload"); // Servlet 3.1规范中可以用Part对象的getSubmittedFileName()方法获得上传的文件名 // 更好的做法是为上传的文件进行重命名（避免同名文件的相互覆盖） part.write(savePath + "/" + part.getSubmittedFileName()); request.setAttribute("hint", "Upload Successfully!"); } else { request.setAttribute("hint", "Upload failed!"); } // 跳转回到上传页面 request.getRequestDispatcher("index.jsp").forward(request, response); } }