java文件上传代码

package com.v512; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.servlet.ServletConfig; import javax.servlet.ServletContext; 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.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.mail.EmailAttachment; import org.apache.commons.mail.EmailException; import org.apache.commons.mail.MultiPartEmail; public class SendAttachmentMailServlet extends HttpServlet { private static final long serialVersionUID = -1408700020471642036L; private ServletContext sc; private String savePath; private Map<String, String> parameters = new HashMap<String, String>(); /** * 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 */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); File file = this.doAttachment(request); MultiPartEmail email = new MultiPartEmail(); email.setCharset("UTF-8"); email.setHostName("smtp.sina.com"); email.setAuthentication("web08", "web2008"); try { email.addTo(parameters.get("to")); email.setFrom(parameters.get("from")); email.setSubject(parameters.get("subject")); email.setMsg(parameters.get("content")); if (file != null) { EmailAttachment attachment = new EmailAttachment(); attachment.setPath(file.getPath()); attachment.setDisposition(EmailAttachment.ATTACHMENT); attachment.setName(file.getName()); email.attach(attachment); } email.send(); request.setAttribute("sendmail.message", "邮件发送成功！"); } catch (EmailException e) { e.printStackTrace(); request.setAttribute("sendmail.message", "邮件发送不成功！"); } request.getRequestDispatcher("/sendResult.jsp").forward(request, response); } public File doAttachment(HttpServletRequest request) throws ServletException, IOException { File file = null; DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); try { List items = upload.parseRequest(request); Iterator it = items.iterator(); while (it.hasNext()) { FileItem item = (FileItem) it.next(); if (item.isFormField()) { parameters .put(item.getFieldName(), item.getString("UTF-8")); } else { if (item.getName() != null && !item.getName().equals("")) { File tempFile = new File(item.getName()); file = new File(sc.getRealPath("/") + savePath, tempFile.getName()); item.write(file); } } } } catch (Exception e) { e.printStackTrace(); request.setAttribute("upload.message", "上传文件不成功！"); } return file; } public void init(ServletConfig config) { savePath = config.getInitParameter("savePath"); sc = config.getServletContext(); } }