参考网上资料总结，虽然有遇到很多坑，网上有，有些讲的不全也不仔细 - package com.zs.web;
- import java.io.File;
- import java.io.IOException;
- import java.io.PrintWriter;
- import javax.servlet.ServletException;
- import javax.servlet.annotation.WebServlet;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import javax.servlet.http.HttpSession;
- import org.apache.commons.fileupload.FileItem;
- import org.apache.commons.fileupload.ProgressListener;
- import org.apache.commons.fileupload.disk.DiskFileItemFactory;
- import org.apache.commons.fileupload.servlet.ServletFileUpload;
- import java.util.Iterator;
- import java.util.List;
- /**
- * Servlet implementation class FilesServlet
- */
- @WebServlet("/FilesServlet")
- public class FilesServlet extends HttpServlet {
- private static final long serialVersionUID = 1L;
- File tempPathFile;
- /**
- * @see HttpServlet#HttpServlet()
- */
- public FilesServlet() {
- super();
- // TODO Auto-generated constructor stub
- }
- @Override
- protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
- // TODO Auto-generated method stub
- String uploadPath =req.getSession().getServletContext().getRealPath("/file/");// 上传文件的目录
- //System.out.println(req.getSession().getServletContext().getRealPath("/"));
- HttpSession session = req.getSession();//使用request对象的getSession()获取session
- try {
- // Create a factory for disk-based file items
- DiskFileItemFactory factory = new DiskFileItemFactory();
-
- // Set factory constraints
- factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb
- factory.setRepository(tempPathFile);// 设置缓冲区目录
-
- // Create a new file upload handler
- ProgressListener progressListener = new ProgressListener(){
- public void update(long pBytesRead, long pContentLength, int pItems) {
- System.out.println("文件个数" + pItems);
- if (pContentLength == -1) {
- System.out.println("正上传：" + pBytesRead );
- } else {
- System.out.println("正上传" + pBytesRead + " of " + pContentLength
- + "");
-
- }
- }
- };
-
- ServletFileUpload upload = new ServletFileUpload(factory);
-
- upload.setProgressListener(progressListener);
-
- // Set overall request size constraint
- upload.setSizeMax(4194304); // 设置最大文件尺寸，这里是4MB
-
- List<FileItem> items = upload.parseRequest(req);// 得到所有的文件
- Iterator<FileItem> i = items.iterator();
- while (i.hasNext()) {
- FileItem fi = (FileItem) i.next();
- String fileName = fi.getName();
- if (fileName != null) {
- File fullFile = new File(new String(fi.getName().getBytes(), "utf-8")); // 解决文件名乱码问题
- File savedFile = new File(uploadPath, fullFile.getName());
- fi.write(savedFile);
- System.out.println(uploadPath);
- }
- }
- System.out.print("upload succeed");
- } catch (Exception e) {
- System.out.println("出现错误");
- }
- }
-
- }
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