servlet页面无法显示

从上一个AddFood.jsp调转到这里就不好使了。

这是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>菜品图片</td>
     <td><input type="file" name="foodImage"></td>
    </tr>
    <tr>
     <td>价  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>

这是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);
}

}

而且后台显示FoodAddServlet并没有运行，不知道怎么回事？

慕村7707015

浏览 1038回答 1

1回答

cxxyjsj

web.xml中Servlet配置了吗？

0 0

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