这个先进些，简单些，但书上提供的例子不能使用，到处弄了弄才行。

servlet代码：

package cc.openhome;import java.io.InputStream;import java.io.OutputStream;import java.io.FileOutputStream;import java.io.FileNotFoundException;import java.io.File;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;/** * Servlet implementation class UploadServlet */@WebServlet("/upload.do")@MultipartConfigpublic class UploadServlet extends HttpServlet {    private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public UploadServlet() {        super();        // TODO Auto-generated constructor stub    }    /**     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)     */    @Override    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        // TODO Auto-generated method stub        //request.setCharacterEncoding("UTF-8");        Part part = request.getPart("photo");        //String uploadPath = request.getServletContext().getRealPath("/upload");          String fileName = getFileName(part);        System.out.println(fileName + "*****************");        writeTo(fileName, part);    }        private String getFileName(Part part) {        String header = part.getHeader("Content-Disposition");        String fileName = header.substring(header.indexOf("filename=\"") + 10,                header.lastIndexOf("\""));        return fileName;    }        private void writeTo(String fileName, Part part) throws FileNotFoundException, IOException {        String uploadPath = "c:/workspace";          part.write(uploadPath + File.separator + fileName);        /***        InputStream in = part.getInputStream();        OutputStream out = new FileOutputStream("c:/workspace" + fileName);        byte[] buffer = new byte[1024];        int length = -1;        while ((length = in.read(buffer)) != -1) {            out.write(buffer, 0, length);        }        in.close();        out.close();        ***/    }}