这是演示代码。
import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import org.apache.commons.fileupload.*;import org.apache.commons.fileupload.util.*;import org.apache.commons.fileupload.servlet.ServletFileUpload;public class UploadServlet extends HttpServlet{ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); out.print("Request content length is " + request.getContentLength() + "<br/>"); out.print("Request content type is " + request.getHeader("Content-Type") + "<br/>"); boolean isMultipart = ServletFileUpload.isMultipartContent(request); if(isMultipart){ ServletFileUpload upload = new ServletFileUpload(); try{ FileItemIterator iter = upload.getItemIterator(request); FileItemStream item = null; String name = ""; InputStream stream = null; while (iter.hasNext()){ item = iter.next(); name = item.getFieldName(); stream = item.openStream(); if(item.isFormField()){out.write("Form field " + name + ": "+ Streams.asString(stream) + "<br/>");} else {name = item.getName();if(name != null && !"".equals(name)){ String fileName = new File(item.getName()).getName(); out.write("Client file: " + item.getName() + " <br/>with file name " + fileName + " was uploaded.<br/>"); File file = new File(getServletContext().getRealPath("/" + fileName)); FileOutputStream fos = new FileOutputStream(file); long fileSize = Streams.copy(stream, fos, true); out.write("Size was " + fileSize + " bytes <br/>"); out.write("File Path is " + file.getPath() + "<br/>");} } } } catch(FileUploadException fue) {out.write("fue!!!!!!!!!");} } }}
