基于javaweb的JSP+Servlet网吧管理系统(java+jsp+servlet+mysql+jdbc)

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

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

基于javaweb的JSP+Servlet网吧管理系统(java+jsp+servlet+mysql+jdbc)

管理员
admin 123456

普通用户
小张 123456
二狗 123456

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

        response.sendRedirect("notice_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;

                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);
    }
}

 *
 * @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/*keyword != null ? new String(keyword.getBytes("ISO-8859-1"), "UTF-8") : null*/);//查询的关键字
    User loginUser = (User) request.getSession().getAttribute("loginUser");
    if (!"管理员".equals(loginUser.getUserType())) {
        params.put("id", loginUser.getId());
    }
    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());

    if (user != null) {
        session.removeAttribute("loginUser");
    }
    response.sendRedirect("login.jsp");
} else if ("validationCode".equalsIgnoreCase(action)) {
    String codeChars = "0123456789";// 图形验证码的字符集合，系统将随机从这个字符串中选择一些字符作为验证码
    //  获得验证码集合的长度
    int charsLength = codeChars.length();
    //  下面三条记录是关闭客户端浏览器的缓冲区
    //  这三条语句都可以关闭浏览器的缓冲区，但是由于浏览器的版本不同，对这三条语句的支持也不同
    //  因此，为了保险起见，建议同时使用这三条语句来关闭浏览器的缓冲区
    response.setHeader("ragma", "No-cache");
    response.setHeader("Cache-Control", "no-cache");
    response.setDateHeader("Expires", 0);
    //  设置图形验证码的长和宽（图形的大小）
    int width = 90, height = 20;
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics g = image.getGraphics();//  获得用于输出文字的Graphics对象
    Random random = new Random();
    g.setColor(getRandomColor(180, 250));// 随机设置要填充的颜色
    g.fillRect(0, 0, width, height);//  填充图形背景
    //  设置初始字体
    g.setFont(new Font("Times New Roman", Font.ITALIC, height));
    g.setColor(getRandomColor(120, 180));// 随机设置字体颜色
    //  用于保存最后随机生成的验证码
    StringBuilder validationCode = new StringBuilder();
    //  验证码的随机字体
    String[] fontNames = {"Times New Roman", "Book antiqua", "Arial"};
    for (int i = 0; i < 4; i++) {
        //  随机设置当前验证码的字符的字体
        g.setFont(new Font(fontNames[random.nextInt(3)], Font.ITALIC, height));
        //  随机获得当前验证码的字符
        char codeChar = codeChars.charAt(random.nextInt(charsLength));
        validationCode.append(codeChar);
        //  随机设置当前验证码字符的颜色
        g.setColor(getRandomColor(10, 100));
        //  在图形上输出验证码字符，x和y都是随机生成的
        g.drawString(String.valueOf(codeChar), 16 * i + random.nextInt(7), height - random.nextInt(6));
    }
    HttpSession session = request.getSession();
    session.setMaxInactiveInterval(5 * 60);
    //  将验证码保存在session对象中，key为validation_code
    session.setAttribute("validationCode", validationCode.toString());
    g.dispose();//  关闭Graphics对象

        //调用Service层增加方法（add），增加记录
        sessionService.add(vo);
        this.redirectList(request, response);
    } else if ("delete".equals(action)) {//删除
        //取出表要删除的上机记录的主键
        long id = Long.parseLong(request.getParameter("id"));
        SessionService sessionService = new SessionServiceImpl();
        //调用Service层删除方法（delete），将对应的记录删除
        sessionService.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Session对象的属性里
        Session vo = new Session();
        vo.setId(Long.valueOf(request.getParameter("id")));
        vo.setSessionName(Long.valueOf(request.getParameter("sessionName")));
        vo.setSessionSeat(Long.valueOf(request.getParameter("sessionSeat")));
        vo.setCreateTime(request.getParameter("createTime"));
        vo.setSessionDuration(request.getParameter("sessionDuration"));
        vo.setSessionText(request.getParameter("sessionText"));
        SessionService sessionService = new SessionServiceImpl();
        //调用Service层更新方法（update），更新记录
        sessionService.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
        SessionService sessionService = new SessionServiceImpl();
        Session vo = sessionService.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("session_" + to + ".jsp");
    } else {//默认去列表页面
        this.redirectList(request, response);
    }
}

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

       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");
       System.out.println("username=" + username);
       System.out.println("password=" + password);
       UserService userService = new UserServiceImpl();
       Map<String, Object> params = new HashMap();
       
       
       params.put("startIndex", 0);
       params.put("pageSize", Long.MAX_VALUE);
       List<User> list = (List<User>) userService.list(params).get("list");
       for (User user : list) {
           if (user.getUsername().equals(username) /*&& user.getPassword().equals(password)*/) {//说明该用户名已存在，必须换个用户名才能注册
               request.getSession().setAttribute("alert_msg", "错误：用户名已存在！");
               request.getRequestDispatcher("register.jsp").forward(request, response);
               return;
           }
       }
       User vo = new User();
       vo.setUsername(username);
       vo.setPassword(password);
       vo.setUserType("普通用户");

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项目链接：
https://javayms.github.io?id=141424392906201lw
https://javayms.pages.dev?id=141424392906201lw