從上一個AddFood.jsp調轉到這里就不好使了。這是AddFood.jsp:<%@ page language="java" contentType="text/html; charset=UTF-8"??? pageEncoding="UTF-8"%><%??? String path = request.getContextPath();??? String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()??????????? + path + "/";%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><base href="<%=basePath%>"><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>添加菜品</title></head><body>??? <center>??<h1>菜品添加</h1>??<form action="<%=basePath%>/FoodAddServlet" method="post" enctype="multipart/form-data">???<table border="1px" width="400px" cellspacing="0px" cellpadding="0px">????<tr>?????<td>菜品 ID</td>?????<td><input type="text" name="id"></td>????</tr>????<tr>?????<td>菜 名</td>?????<td><input type="text" name="foodName"></td>????</tr>????<tr>?????<td>口 味</td>?????<td>??????<input type="radio" name="taste" value="香辣">香辣??????<input type="radio" name="taste" value="微辣">微辣??????<input type="radio" name="taste" value="麻辣">麻辣??????<input type="radio" name="taste" value="不辣">不辣?????</td>????</tr>????<tr>?????<td>菜品圖片</td>?????<td><input type="file" name="foodImage"></td>????</tr>????<tr>?????<td>價 格</td>?????<td><input type="text" name="price"></td>????</tr>????<tr>?????<td>菜品描述</td>?????<td>??????<textarea name="description"></textarea>?????</td>????</tr>????<tr?? style="text-align:center;width:20px">?????<td colspan="2">??????<input type="submit" value="添加">??????<input type="reset" value="重置">?????</td>????</tr>???</table>??</form>?</center>?<%? System.out.println("1"); %></body></html>這是FoodAddServlet:package com.imooc;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;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 FoodAddServlet extends HttpServlet {?protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {??try {???Map<String,String> map = new HashMap<String,String>();???DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();???ServletFileUpload servletFileUpload = new ServletFileUpload(diskFileItemFactory);???List<FileItem> list = servletFileUpload.parseRequest(request);???String url = null;???for (FileItem fileItem : list) {????if(fileItem.isFormField()){?????String name = fileItem.getFieldName(); ?????String value = fileItem.getString("UTF-8");?????System.out.println(name+"??? "+value);??????map.put(name, value);?????????}else{?????String fileName = fileItem.getName();?????if(fileName !=null && !"".equals(fileName)){??????String uuidFileName = UploadUtils.getUUIDFileName(fileName);??????InputStream is = fileItem.getInputStream();??????String path = this.getServletContext().getRealPath("/upload");??????url = path+"\\"+uuidFileName;??????OutputStream os = new FileOutputStream(url);??????int len = 0;??????byte[] b = new byte[1024];??????while((len = is.read(b))!=-1){???????os.write(b, 0, len);??????}??????is.close();??????os.close();?????}????????}???}???System.out.println(map);???List<Food> foodList = (List<Food>) this.getServletContext().getAttribute("list");???for(Food u :foodList){????if(u.getFoodName().equals(map.get("username"))){?????request.setAttribute("msg", "? ");?????request.getRequestDispatcher("/regist.jsp").forward(request, response);?????return ;????}???}???Food f = new Food();???f.setFoodId(map.get("id"));???f.setFoodName(map.get("foodName"));???f.setFoodTaste(map.get("taste"));???f.setFoodPath(url);???f.setFoodPrice(map.get("price"));???f.setFoodDescribe("description");??????foodList.add(f);???for (Food u : foodList) {????System.out.println(u);???}???this.getServletContext().setAttribute("list", foodList);???request.getSession().setAttribute("username", f.getFoodName());???response.sendRedirect(request.getContextPath()+"/showFoodList.jsp");??} catch (FileUploadException e) {???e.printStackTrace();??}???}?protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {??doGet(request, response);?}}而且后臺顯示FoodAddServlet并沒有運行，不知道怎么回事？
servlet頁面無法顯示
慕村7707015
2018-07-24 21:38:04
