老师我正在做添加文件功能

老师我正在做添加文件功能 可是添加菜品页面点击了添加按钮之后出现了404错误 文件工厂的upload功能也没有再工作台体现 是addFood。jsp的问题吗
foodaddservlet。java
package servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
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;

/**
 * Servlet implementation class addServlet
 */

public class FoodAddServlet extends HttpServlet {
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	    
	    try {
	    	DiskFileItemFactory diskFileItemFactory=new DiskFileItemFactory();
		    ServletFileUpload servletFileUpload=new ServletFileUpload(diskFileItemFactory);
			List<FileItem> list=servletFileUpload.parseRequest(request);
			for (FileItem fileItem : list) {
				if(fileItem.isFormField()) {
					String name=fileItem.getFieldName();
					String value=fileItem.getString("UTF-8");
					System.out.println(name+"   "+value);
				}else {

			}
			}
			
		} catch (FileUploadException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	
		doGet(request, response);
	}

}

initservlet。java

package servlet;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import com.imooc.domain.Food;

/**

 * Servlet implementation class InitServlet

 */

public class InitServlet extends HttpServlet {

public void init() throws ServletException {

List<Food> list=new ArrayList<Food>();

this.getServletContext().setAttribute("list", list);

}

}

food。java

package com.imooc.domain;

public class Food {

public String id;

public String foodName;

public String taste;

public String foodImage;

public String price;

public String description;

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getFoodName() {

return foodName;

}

public void setFoodName(String foodName) {

this.foodName = foodName;

}

public String getTaste() {

return taste;

}

public void setTaste(String taste) {

this.taste = taste;

}

public String getFoodImage() {

return foodImage;

}

public void setFoodImage(String foodImage) {

this.foodImage = foodImage;

}

public String getPrice() {

return price;

}

public void setPrice(String price) {

this.price = price;

}

public String getDescription() {

return description;

}

public void setDescription(String description) {

this.description = description;

}

}