页面跳转为404

我复制粘贴源代码，输入http://localhost:8080/sm/department/list.jsp，启动服务器后，跳转成404

package com.imooc.sm.service.impl;

import com.imooc.sm.dao.DepartmentDao;
import com.imooc.sm.entity.Department;
import com.imooc.sm.service.DepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("departmentService")
public class DepartmentServiceImpl implements DepartmentService {
   @Qualifier("departmentDao")
   @Autowired
   private DepartmentDao departmentDao;

   public void add(Department department) {
       departmentDao.insert(department);
   }

   public void remove(Integer id) {
       departmentDao.delete(id);
   }

   public void edit(Department department) {
       departmentDao.update(department);
   }

   public Department get(Integer id) {
       return departmentDao.selectById(id);
   }

   public List<Department> getAll() {
       return departmentDao.selectAll();
   }
}

package com.imooc.sm.controller;

import com.imooc.sm.entity.Department;
import com.imooc.sm.service.DepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@Controller("departmentControllter")
public class DepartmentControllter {
   @Autowired
   private DepartmentService departmentService;
   public void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       List<Department> list = departmentService.getAll();
       request.setAttribute("LIST",list);
       request.getRequestDispatcher("../department_list.jsp").forward(request,response);
   }
}