HttpClient PostMethod 上传文件

package com.demo.http; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class HttpPostServlet extends HttpServlet { private String userid; private String password; private String msg; private FileItem myfile; private String bufferpath;//上传文件时的缓冲区位置 private String savepath;//上传上来的文件保存位置 /** * */ private static final long serialVersionUID = -2122613601586478063L; /** * Constructor of the object. */ public HttpPostServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ @SuppressWarnings("unchecked") public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("GBK"); response.setContentType("text/html;charset=gbk"); bufferpath = "D:\\temp\\buffer\\";//上传文件时的缓冲区位置 savepath = "D:\\temp\\smstemps\\";//上传上来的临时文件保存位置 DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb File savedir = new File(savepath);//设置文件保存目录 if (!savedir.isDirectory()) { savedir.mkdirs(); } File bufferdir = new File(bufferpath); if (!bufferdir.isDirectory()) { bufferdir.mkdirs(); } factory.setRepository(bufferdir);// 设置缓冲区目录 因为是上传文件的表单类型 所以 表单里面的所有属性都是 以字节流的形式穿到后台 //并临时存放到缓冲区目录 ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(41943040); // 设置最大文件尺寸，这里是40MB List<FileItem> items; try { items = upload.parseRequest(request); Iterator<FileItem> i = items.iterator(); while (i.hasNext()) { FileItem fi = (FileItem) i.next(); // fi.isFormField() 如果是true 则是普通属性 如果是false 则是文件 if (fi.isFormField()) { if ("userid".equals(fi.getFieldName())) { userid = fi.getString(); } if ("password".equals(fi.getFieldName())) { password = fi.getString(); } if ("msg".equals(fi.getFieldName())) { msg = fi.getString(); } } if ("myfile".equals(fi.getFieldName())) {//对上传过来的 文件单独进行处理 myfile = fi; try { myfile.write(new File(savedir, fi.getName()));//将文件保存起来 //myfile.write(new File("D://asdf/adsf/adsf.txt"));//也可以这样写 直接指定自己的文件路径和文件名字 } catch (Exception e) { e.printStackTrace(); } } } } catch (FileUploadException e1) { e1.printStackTrace(); } PrintWriter out = response.getWriter(); out.println("表单里面的数据 " + userid + password + msg); out.close(); out = null; } /** * Initialization of the servlet. <br> * @throws ServletException if an error occurs */ public void init() throws ServletException { } }