使用getParts()上传多个文件
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<!DOCTYPE html> <html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <div> <form action="UploadServlet3" method="POST" enctype="multipart/form-data"> <table> <tr> <td><label for="file1">文件1：</label></td> <td><input type="file" id="file1" name="file"></td> </tr> <tr> <td><label for="file2">文件2：</label></td> <td><input type="file" id="file2" name="file"></td> </tr> <tr> <td><label for="file3">文件3：</label></td> <td><input type="file" id="file3" name="file"></td> </tr> <tr> <td colspan="2"><input type="submit" value="上传" name="upload"></td> </tr> </table> </form> </div> </body> </html>
@MultipartConfig(location = "e:/workspace")
@WebServlet(name = "UploadServlet", urlPatterns = {"/UploadServlet"})
public class UploadServlet extends HttpServlet {
/**
* Processes requests for both HTTP
* <code>GET</code> and
* <code>POST</code> methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
//迭代Collection中所有Part对象
for (Part part : request.getParts()) {
//只处理上传文件区段
if (part.getName().startsWith("file")) {
String fileName = getFileName(part);
part.write(fileName);
}
}
}
private String getFileName(Part part) {
String header = part.getHeader("Content-Disposition");
String fileName = header.substring(header.indexOf("filename=\"") + 10, header.lastIndexOf("\""));
header.lastIndexOf("\"");
return fileName;
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP
* <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP
* <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
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