基于javaweb+mysql的jsp+servlet饮食营养健康管理系统(JavaWeb MySQL JSP Bootstrap Servlet SSM SpringBoot)

运行环境

Java≥8、MySQL≥5.7、Tomcat≥8

开发工具

eclipse/idea/myeclipse/sts等均可配置运行

技术框架

JavaBean MVC JSP Servlet MySQL CSS JavaScript Bootstrap.

适用

课程设计，大作业，毕业设计，项目练习，学习演示等

功能说明

登录、注册、退出、用户模块、公告模块、食材信息模块、食疗处方模块的增删改查管理

eclipse/MyEclipse运行：

idea运行：

//@WebServlet("/AuthServlet")
public class AuthServlet extends HttpServlet {
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("login".equalsIgnoreCase(action)) {//登录
            String username = request.getParameter("username");
            String password = request.getParameter("password");

            String validationCode = request.getParameter("validationCode");
            if (validationCode != null && !validationCode.equals(request.getSession().getAttribute("validationCode"))) {//验证码不通过
                request.getSession().setAttribute("alert_msg", "错误：验证码不正确！");
                request.getRequestDispatcher("login.jsp").forward(request, response);
                return;
            }

            UserService userService = new UserServiceImpl();
            Map<String, Object> params = new HashMap();
            
            
            List<User> list = (List<User>) userService.list(params).get("list");
            for (User user : list) {
                if (user.getUsername().equals(username) && user.getPassword().equals(password)) {//找到这个管理员了
                    request.getSession().setAttribute("loginUser", user);
					request.getSession().setMaxInactiveInterval(Integer.MAX_VALUE);
                    request.getRequestDispatcher("UserServlet").forward(request, response);
                    return;
                }
            }
            request.getSession().setAttribute("alert_msg", "错误：用户名或密码错误！");
            request.getRequestDispatcher("login.jsp").forward(request, response);
        } else if ("register".equalsIgnoreCase(action)) {//注册
            String username = request.getParameter("username");
            String password = request.getParameter("password");

        List list = (List) shiliaoService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list
        pb.setServlet("ShiliaoServlet");
        pb.setSearchColumn(searchColumn);
        pb.setKeyword(keyword);
        pb.setList(list);
        request.getSession().setAttribute("pageBean", pb);
        request.getSession().setAttribute("list", pb.getList());

        response.sendRedirect("shiliao_list.jsp");
    }
}

/**
 * 这是过滤器
 * 主要负责过滤编码为utf-8及登录拦截，禁止未登录就访问
 */
public class LoginFilter implements Filter {

    //@Override
    public void destroy() {
    }

    //@Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;
        HttpSession session = request.getSession();
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        //移除错误提示
        session.removeAttribute("alert_msg");
        //登录拦截
        String uri = request.getRequestURI();
        String action = request.getParameter("action");
        if (uri.endsWith("login.jsp") || uri.endsWith("register.jsp") || "register".equalsIgnoreCase(action) || "validationCode".equalsIgnoreCase(action) || "login".equalsIgnoreCase(action) || uri.endsWith(".css") || uri.endsWith(".js") || uri.endsWith(".png") || uri.endsWith(".jpg")) {
            chain.doFilter(request, response);
            return;
        } else if (session.getAttribute("loginUser") == null) {
            session.setAttribute("alert_msg", "错误：请先登录！");
            response.sendRedirect("login.jsp");
            return;
        }
        chain.doFilter(request, response);
    }

     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//Get请求和Post请求的处理是一样的，所以把request、response转交给Post方法就好
    }

    /**
     * 根据参数，查询出条例条件的记录集合，最后将数据返回给调用处或者将数据集合设置到session域里，再跳转到对应的列表页面
     *
     * @param request
     * @param response
     */
    private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //查询列和关键字
        String searchColumn = request.getParameter("searchColumn");
        String keyword = request.getParameter("keyword");
        Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
        params.put("searchColumn", searchColumn);//要查询的列
        params.put("keyword", keyword);//查询的关键字
        FoodService foodService = new FoodServiceImpl();
        Map<String, Object> map = foodService.list(params);
        request.getSession().setAttribute("list", map.get("list"));

        Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数，用于分页
        String pageNum = request.getParameter("pageNum");//封装分页参数
        com.demo.util.PageBean<Object> pb = new com.demo.util.PageBean(Integer.valueOf(pageNum != null ? pageNum : "1"), totalRecord);
        params.put("startIndex", pb.getStartIndex());
        params.put("pageSize", pb.getPageSize());
        List list = (List) foodService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list
        pb.setServlet("FoodServlet");
        pb.setSearchColumn(searchColumn);
        pb.setKeyword(keyword);
        pb.setList(list);
        request.getSession().setAttribute("pageBean", pb);
        request.getSession().setAttribute("list", pb.getList());

        response.sendRedirect("food_list.jsp");
    }
}

            vo.setNoticeName(request.getParameter("noticeName"));
            vo.setNoticeText(request.getParameter("noticeText"));
            vo.setNoticeType(request.getParameter("noticeType"));
            vo.setCreateDate(request.getParameter("createDate"));
            NoticeService noticeService = new NoticeServiceImpl();
            //调用Service层更新方法（update），更新记录
            noticeService.update(vo);
            this.redirectList(request, response);
        } else if ("get".equalsIgnoreCase(action) || "editPre".equalsIgnoreCase(action)) {//根据主键ID，查询详情信息并跳转到详情页面或编辑页面
            Serializable id = request.getParameter("id");//取出页面传入的主键，用于查询详情
            NoticeService noticeService = new NoticeServiceImpl();
            Notice vo = noticeService.get(id);
            request.getSession().setAttribute("vo", vo);
            String to = "get".equalsIgnoreCase(action) ? "info" : "edit";//判断是去详情显示页面还是编辑页面
            response.sendRedirect("notice_" + to + ".jsp");
        } else {//默认去列表页面
            this.redirectList(request, response);
        }
    }

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//Get请求和Post请求的处理是一样的，所以把request、response转交给Post方法就好
    }

    /**
     * 根据参数，查询出条例条件的记录集合，最后将数据返回给调用处或者将数据集合设置到session域里，再跳转到对应的列表页面
     *
     * @param request
     * @param response
     */
    private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //查询列和关键字
        String searchColumn = request.getParameter("searchColumn");
        String keyword = request.getParameter("keyword");

            if (!loginUser.getPassword().equals(oldPassword)) {
                msg = "原密码错误！";
            } else {
                String newPassword = request.getParameter("newPassword");
                loginUser.setPassword(newPassword);
                UserService userService = new UserServiceImpl();
                userService.update(loginUser);
                msg = "修改成功！";
            }
            request.getSession().setAttribute("alert_msg", msg);
            request.getRequestDispatcher("reset_password.jsp").forward(request, response);
        } else {
            response.sendRedirect("login.jsp");
        }
    }

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    // 返回一个随机颜色（Color对象）
    private Color getRandomColor(int minColor, int maxColor) {
        Random random = new Random();
        // 保存minColor最大不会超过255
        if (minColor > 255)
            minColor = 255;
        //  保存minColor最大不会超过255
        if (maxColor > 255)
            maxColor = 255;
        //  获得红色的随机颜色值
        int red = minColor + random.nextInt(maxColor - minColor);
        //  获得绿色的随机颜色值
        int green = minColor + random.nextInt(maxColor - minColor);

            String to = "get".equalsIgnoreCase(action) ? "info" : "edit";//判断是去详情显示页面还是编辑页面
            response.sendRedirect("food_" + to + ".jsp");
        } else {//默认去列表页面
            this.redirectList(request, response);
        }
    }

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//Get请求和Post请求的处理是一样的，所以把request、response转交给Post方法就好
    }

    /**
     * 根据参数，查询出条例条件的记录集合，最后将数据返回给调用处或者将数据集合设置到session域里，再跳转到对应的列表页面
     *
     * @param request
     * @param response
     */
    private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //查询列和关键字
        String searchColumn = request.getParameter("searchColumn");
        String keyword = request.getParameter("keyword");
        Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
        params.put("searchColumn", searchColumn);//要查询的列
        params.put("keyword", keyword);//查询的关键字
        FoodService foodService = new FoodServiceImpl();
        Map<String, Object> map = foodService.list(params);
        request.getSession().setAttribute("list", map.get("list"));

        Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数，用于分页
        String pageNum = request.getParameter("pageNum");//封装分页参数
        com.demo.util.PageBean<Object> pb = new com.demo.util.PageBean(Integer.valueOf(pageNum != null ? pageNum : "1"), totalRecord);
        params.put("startIndex", pb.getStartIndex());
        params.put("pageSize", pb.getPageSize());
        List list = (List) foodService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//Get请求和Post请求的处理是一样的，所以把request、response转交给Post方法就好
    }

    /**
     * 根据参数，查询出条例条件的记录集合，最后将数据返回给调用处或者将数据集合设置到session域里，再跳转到对应的列表页面
     *
     * @param request
     * @param response
     */
    private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //查询列和关键字
        String searchColumn = request.getParameter("searchColumn");
        String keyword = request.getParameter("keyword");
        Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
        params.put("searchColumn", searchColumn);//要查询的列
        params.put("keyword", keyword);//查询的关键字
        UserService userService = new UserServiceImpl();
        Map<String, Object> map = userService.list(params);
        request.getSession().setAttribute("list", map.get("list"));

        Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数，用于分页
        String pageNum = request.getParameter("pageNum");//封装分页参数
        com.demo.util.PageBean<Object> pb = new com.demo.util.PageBean(Integer.valueOf(pageNum != null ? pageNum : "1"), totalRecord);
        params.put("startIndex", pb.getStartIndex());
        params.put("pageSize", pb.getPageSize());
        List list = (List) userService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list
        pb.setServlet("UserServlet");
        pb.setSearchColumn(searchColumn);
        pb.setKeyword(keyword);
        pb.setList(list);
        request.getSession().setAttribute("pageBean", pb);
        request.getSession().setAttribute("list", pb.getList());

        response.sendRedirect("user_list.jsp");
    }
}

            //取出表要删除的用户记录的主键
            long id = Long.parseLong(request.getParameter("id"));
            UserService userService = new UserServiceImpl();
            //调用Service层删除方法（delete），将对应的记录删除
            userService.delete(id);
            this.redirectList(request, response);
        } else if ("edit".equals(action)) {//修改
            //取出页面传进来的各个数据，并设置到User对象的属性里
            User vo = new User();
            vo.setId(Long.valueOf(request.getParameter("id")));
            vo.setUsername(request.getParameter("username"));
            vo.setPassword(request.getParameter("password"));
            vo.setRealName(request.getParameter("realName"));
            vo.setUserSex(request.getParameter("userSex"));
            vo.setUserPhone(request.getParameter("userPhone"));
            vo.setUserText(request.getParameter("userText"));
            vo.setUserType(request.getParameter("userType"));
            UserService userService = new UserServiceImpl();
            //调用Service层更新方法（update），更新记录
            userService.update(vo);
            this.redirectList(request, response);
        } else if ("get".equalsIgnoreCase(action) || "editPre".equalsIgnoreCase(action)) {//根据主键ID，查询详情信息并跳转到详情页面或编辑页面
            Serializable id = request.getParameter("id");//取出页面传入的主键，用于查询详情
            UserService userService = new UserServiceImpl();
            User vo = userService.get(id);
            request.getSession().setAttribute("vo", vo);
            String to = "get".equalsIgnoreCase(action) ? "info" : "edit";//判断是去详情显示页面还是编辑页面
            response.sendRedirect("user_" + to + ".jsp");
        } else {//默认去列表页面
            this.redirectList(request, response);
        }
    }

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//Get请求和Post请求的处理是一样的，所以把request、response转交给Post方法就好
    }

    /**

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    // 返回一个随机颜色（Color对象）
    private Color getRandomColor(int minColor, int maxColor) {
        Random random = new Random();
        // 保存minColor最大不会超过255
        if (minColor > 255)
            minColor = 255;
        //  保存minColor最大不会超过255
        if (maxColor > 255)
            maxColor = 255;
        //  获得红色的随机颜色值
        int red = minColor + random.nextInt(maxColor - minColor);
        //  获得绿色的随机颜色值
        int green = minColor + random.nextInt(maxColor - minColor);
        //  获得蓝色的随机颜色值
        int blue = minColor + random.nextInt(maxColor - minColor);
        return new Color(red, green, blue);
    }
}

    }

    /**
     * 根据参数，查询出条例条件的记录集合，最后将数据返回给调用处或者将数据集合设置到session域里，再跳转到对应的列表页面
     *
     * @param request
     * @param response
     */
    private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //查询列和关键字
        String searchColumn = request.getParameter("searchColumn");
        String keyword = request.getParameter("keyword");
        Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
        params.put("searchColumn", searchColumn);//要查询的列
        params.put("keyword", keyword);//查询的关键字
        FoodService foodService = new FoodServiceImpl();
        Map<String, Object> map = foodService.list(params);
        request.getSession().setAttribute("list", map.get("list"));

        Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数，用于分页
        String pageNum = request.getParameter("pageNum");//封装分页参数
        com.demo.util.PageBean<Object> pb = new com.demo.util.PageBean(Integer.valueOf(pageNum != null ? pageNum : "1"), totalRecord);
        params.put("startIndex", pb.getStartIndex());
        params.put("pageSize", pb.getPageSize());
        List list = (List) foodService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list
        pb.setServlet("FoodServlet");
        pb.setSearchColumn(searchColumn);
        pb.setKeyword(keyword);
        pb.setList(list);
        request.getSession().setAttribute("pageBean", pb);
        request.getSession().setAttribute("list", pb.getList());

        response.sendRedirect("food_list.jsp");
    }
}

/**
 * 公告模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>

        response.sendRedirect("user_list.jsp");
    }
}

/**
 * 食材信息模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>
 * 而后再调用FoodService业务层的方法来处理具体的业务，最后将处理完成的结果返回或跳转至相应页面
 */
//@WebServlet("/FoodServlet")
public class FoodServlet extends HttpServlet {

    /**
     * 处理Post请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("add".equals(action)) {//增加
            Food vo = new Food();
            //取出页面传进来的各个数据，并设置到Food对象的属性里
            vo.setFoodName(request.getParameter("foodName"));
            vo.setFoodType(request.getParameter("foodType"));
            vo.setFoodPingjia(request.getParameter("foodPingjia"));

        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("add".equals(action)) {//增加
            Shiliao vo = new Shiliao();
            //取出页面传进来的各个数据，并设置到Shiliao对象的属性里
            vo.setShiliaoName(request.getParameter("shiliaoName"));
            vo.setShiliaoFangan(request.getParameter("shiliaoFangan"));
            vo.setShiliaoText(request.getParameter("shiliaoText"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层增加方法（add），增加记录
            shiliaoService.add(vo);
            this.redirectList(request, response);
        } else if ("delete".equals(action)) {//删除
            //取出表要删除的食疗处方记录的主键
            long id = Long.parseLong(request.getParameter("id"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层删除方法（delete），将对应的记录删除
            shiliaoService.delete(id);
            this.redirectList(request, response);
        } else if ("edit".equals(action)) {//修改
            //取出页面传进来的各个数据，并设置到Shiliao对象的属性里
            Shiliao vo = new Shiliao();
            vo.setId(Long.valueOf(request.getParameter("id")));
            vo.setShiliaoName(request.getParameter("shiliaoName"));
            vo.setShiliaoFangan(request.getParameter("shiliaoFangan"));
            vo.setShiliaoText(request.getParameter("shiliaoText"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层更新方法（update），更新记录
            shiliaoService.update(vo);
            this.redirectList(request, response);
        } else if ("get".equalsIgnoreCase(action) || "editPre".equalsIgnoreCase(action)) {//根据主键ID，查询详情信息并跳转到详情页面或编辑页面
            Serializable id = request.getParameter("id");//取出页面传入的主键，用于查询详情
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            Shiliao vo = shiliaoService.get(id);
            request.getSession().setAttribute("vo", vo);
            String to = "get".equalsIgnoreCase(action) ? "info" : "edit";//判断是去详情显示页面还是编辑页面
            response.sendRedirect("shiliao_" + to + ".jsp");
        } else {//默认去列表页面
            this.redirectList(request, response);

/**
 * 食疗处方模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>
 * 而后再调用ShiliaoService业务层的方法来处理具体的业务，最后将处理完成的结果返回或跳转至相应页面
 */
//@WebServlet("/ShiliaoServlet")
public class ShiliaoServlet extends HttpServlet {

    /**
     * 处理Post请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("add".equals(action)) {//增加
            Shiliao vo = new Shiliao();
            //取出页面传进来的各个数据，并设置到Shiliao对象的属性里
            vo.setShiliaoName(request.getParameter("shiliaoName"));
            vo.setShiliaoFangan(request.getParameter("shiliaoFangan"));
            vo.setShiliaoText(request.getParameter("shiliaoText"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层增加方法（add），增加记录
            shiliaoService.add(vo);
            this.redirectList(request, response);
        } else if ("delete".equals(action)) {//删除
            //取出表要删除的食疗处方记录的主键
            long id = Long.parseLong(request.getParameter("id"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层删除方法（delete），将对应的记录删除
            shiliaoService.delete(id);

/**
 * 食疗处方模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>
 * 而后再调用ShiliaoService业务层的方法来处理具体的业务，最后将处理完成的结果返回或跳转至相应页面
 */
//@WebServlet("/ShiliaoServlet")
public class ShiliaoServlet extends HttpServlet {

    /**
     * 处理Post请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("add".equals(action)) {//增加
            Shiliao vo = new Shiliao();
            //取出页面传进来的各个数据，并设置到Shiliao对象的属性里
            vo.setShiliaoName(request.getParameter("shiliaoName"));
            vo.setShiliaoFangan(request.getParameter("shiliaoFangan"));
            vo.setShiliaoText(request.getParameter("shiliaoText"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层增加方法（add），增加记录
            shiliaoService.add(vo);
            this.redirectList(request, response);
        } else if ("delete".equals(action)) {//删除
            //取出表要删除的食疗处方记录的主键
            long id = Long.parseLong(request.getParameter("id"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层删除方法（delete），将对应的记录删除
            shiliaoService.delete(id);

            String msg;
            User loginUser = (User) request.getSession().getAttribute("loginUser");
            String oldPassword = request.getParameter("oldPassword");
            if (!loginUser.getPassword().equals(oldPassword)) {
                msg = "原密码错误！";
            } else {
                String newPassword = request.getParameter("newPassword");
                loginUser.setPassword(newPassword);
                UserService userService = new UserServiceImpl();
                userService.update(loginUser);
                msg = "修改成功！";
            }
            request.getSession().setAttribute("alert_msg", msg);
            request.getRequestDispatcher("reset_password.jsp").forward(request, response);
        } else {
            response.sendRedirect("login.jsp");
        }
    }

    /**
     * 处理Get请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    // 返回一个随机颜色（Color对象）
    private Color getRandomColor(int minColor, int maxColor) {
        Random random = new Random();
        // 保存minColor最大不会超过255
        if (minColor > 255)
            minColor = 255;
        //  保存minColor最大不会超过255
        if (maxColor > 255)
            maxColor = 255;
        //  获得红色的随机颜色值
        int red = minColor + random.nextInt(maxColor - minColor);
        //  获得绿色的随机颜色值
        int green = minColor + random.nextInt(maxColor - minColor);
        //  获得蓝色的随机颜色值
        int blue = minColor + random.nextInt(maxColor - minColor);
        return new Color(red, green, blue);
    }

        String keyword = request.getParameter("keyword");
        Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
        params.put("searchColumn", searchColumn);//要查询的列
        params.put("keyword", keyword);//查询的关键字
        UserService userService = new UserServiceImpl();
        Map<String, Object> map = userService.list(params);
        request.getSession().setAttribute("list", map.get("list"));

        Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数，用于分页
        String pageNum = request.getParameter("pageNum");//封装分页参数
        com.demo.util.PageBean<Object> pb = new com.demo.util.PageBean(Integer.valueOf(pageNum != null ? pageNum : "1"), totalRecord);
        params.put("startIndex", pb.getStartIndex());
        params.put("pageSize", pb.getPageSize());
        List list = (List) userService.list(params).get("list");//根据分页参数startIndex、pageSize查询出来的最终结果list
        pb.setServlet("UserServlet");
        pb.setSearchColumn(searchColumn);
        pb.setKeyword(keyword);
        pb.setList(list);
        request.getSession().setAttribute("pageBean", pb);
        request.getSession().setAttribute("list", pb.getList());

        response.sendRedirect("user_list.jsp");
    }
}

/**
 * 食材信息模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>
 * 而后再调用FoodService业务层的方法来处理具体的业务，最后将处理完成的结果返回或跳转至相应页面
 */
//@WebServlet("/FoodServlet")
public class FoodServlet extends HttpServlet {

    /**
     * 处理Post请求
     *
     * @param request
     * @param response

}

/**
 * 食疗处方模块的Servlet控制层，负责接收页面传过来的请求参数，根据action参数的值来确定页面要执行的具体操作<br>
 * 而后再调用ShiliaoService业务层的方法来处理具体的业务，最后将处理完成的结果返回或跳转至相应页面
 */
//@WebServlet("/ShiliaoServlet")
public class ShiliaoServlet extends HttpServlet {

    /**
     * 处理Post请求
     *
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //过滤编码
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String action = request.getParameter("action");
        if ("add".equals(action)) {//增加
            Shiliao vo = new Shiliao();
            //取出页面传进来的各个数据，并设置到Shiliao对象的属性里
            vo.setShiliaoName(request.getParameter("shiliaoName"));
            vo.setShiliaoFangan(request.getParameter("shiliaoFangan"));
            vo.setShiliaoText(request.getParameter("shiliaoText"));
            ShiliaoService shiliaoService = new ShiliaoServiceImpl();
            //调用Service层增加方法（add），增加记录
            shiliaoService.add(vo);
            this.redirectList(request, response);