Java晚会抽奖系统如何实现

这篇文章主要介绍"Java晚会抽奖系统如何实现"，在日常操作中，相信很多人在Java晚会抽奖系统如何实现问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"Java晚会抽奖系统如何实现"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

一、项目运行

环境配置：

Jdk1.8 + Tomcat8.5 + mysql + Eclispe（IntelliJ IDEA,Eclispe,MyEclispe,Sts都支持）

项目技术：

Jdbc+ Servlert + html+ css + JavaScript + JQuery + Ajax +等等

二、效果图

三、核心代码

管理员登陆控制层

public class adminAction implements ModelDriven{        admin admin = null;        public String login() {                DBManager dbManager = new DBManager();                String sql= "select * from admin where username = '"+admin.getUsername()+"' and password = '"+admin.getPassword()+"'";                ResultSet resultSet = dbManager.executeQuery(sql);                try {                        if (resultSet.next()) {                        System.out.println("登陆成功");                        ActionContext.getContext().getSession().put("admin", admin);                        return "success";                }else {                        ActionContext.getContext().getSession().put("message", "登录失败");                        return "failed";                }                } catch (Exception e) {                        e.printStackTrace();                        ActionContext.getContext().getSession().put("message", "登录失败");                        // TODO: handle exception                }finally{                        dbManager.closeConnection();                }                                return "failed";        }         @Override        public Object getModel() {                // TODO Auto-generated method stub                if (admin == null) {                        admin = new admin();                }                return admin;        }}

抽奖控制层一二三等奖设置

public class choujiangAction implements ModelDriven {        private luck_dog luck_dog = null;         @Override        public Object getModel() {                // TODO Auto-generated method stub                if (luck_dog == null) {                        luck_dog = new luck_dog();                }                return luck_dog;        }         public void choujiang() {                System.out.println(luck_dog.getLuck_num());                DBManager dbManager = new DBManager();                String sql = "select * from lucky_dog where luck_num = "                                + luck_dog.getLuck_num();                ResultSet resultSet = dbManager.executeQuery(sql);                try {                        if (resultSet.next()) {                                System.out.println("这个号码已经中过奖！！！");                                String s = "{\"name\":\"提示\",\"age\":\"alreadyexisterror\"}";                                ServletActionContext.getResponse()                                                .setCharacterEncoding("UTF-8");                                ServletActionContext.getResponse().getWriter().print(s);                                return;                        } else {                                int total = 0;                                int luck_group = 0;                                sql = "select count(*)as totalCount from lucky_dog";                                resultSet = dbManager.executeQuery(sql);                                if (resultSet.next()) {                                        total = resultSet.getInt("totalCount");                                }// 得到抽奖表中的记录数                                if (total < 8) {                                        luck_group = 3;// 三等奖8个                                } else if (total < 13) {                                        luck_group = 2;// 二等奖5个                                } else if (total < 16) {                                        luck_group = 1;// 一等奖3个                                } else {                                        System.out.println("抽奖总数已满！！！");                                        String s = "{\"name\":\"提示\",\"age\":\"totaloverflowerror\"}";                                        ServletActionContext.getResponse().setCharacterEncoding(                                                        "UTF-8");                                        ServletActionContext.getResponse().getWriter().print(s);                                        return;                                }                                sql = "insert into lucky_dog (luck_num,luck_group)values("                                                + luck_dog.getLuck_num() + "," + luck_group + ")";                                boolean result = dbManager.insertSQL(sql);                                if (result) {                                        String s = "{\"name\":\"提示\",\"age\":\"success\"}";                                        ServletActionContext.getResponse().setCharacterEncoding(                                                        "UTF-8");                                        ServletActionContext.getResponse().getWriter().print(s);                                        System.out.println("抽奖数据已经写入数据库");                                } else {                                        System.out.println("抽奖数据写入失败");                                }                        }                } catch (Exception e) {                        // TODO: handle exception                } finally {                        dbManager.closeConnection();                 }         }         public void view_result() {                System.out.println("view_resultview_resultview_result");                DBManager dbManager = new DBManager();                String sql = "select * from lucky_dog";                luck_dog luck_dog = null;                ResultSet resultSet = dbManager.executeQuery(sql);                List luck_dogList = new ArrayList();                try {                        while (resultSet.next()) {                                luck_dog = new luck_dog();                                luck_dog.setId(resultSet.getInt("id"));                                luck_dog.setLuck_group(resultSet.getInt("luck_group"));                                luck_dog.setLuck_num(resultSet.getInt("luck_num"));                                luck_dogList.add(luck_dog);                        }                        JSONArray jsonArray = JSONArray.fromObject(luck_dogList);                        System.out.println(jsonArray);                        // String s = "{\"name\":\"提示\",\"age\":\"已提交抢答申请，请静候抢答结果！！！\"}";                        ServletActionContext.getResponse().setCharacterEncoding("UTF-8");                        ServletActionContext.getResponse().getWriter().print(jsonArray);                } catch (Exception e) {                        // TODO: handle exception                        e.printStackTrace();                } finally {                        dbManager.closeConnection();                 }         } }

抢答控制层

public class choujiangAction implements ModelDriven {        private luck_dog luck_dog = null;         @Override        public Object getModel() {                // TODO Auto-generated method stub                if (luck_dog == null) {                        luck_dog = new luck_dog();                }                return luck_dog;        }         public void choujiang() {                System.out.println(luck_dog.getLuck_num());                DBManager dbManager = new DBManager();                String sql = "select * from lucky_dog where luck_num = "                                + luck_dog.getLuck_num();                ResultSet resultSet = dbManager.executeQuery(sql);                try {                        if (resultSet.next()) {                                System.out.println("这个号码已经中过奖！！！");                                String s = "{\"name\":\"提示\",\"age\":\"alreadyexisterror\"}";                                ServletActionContext.getResponse()                                                .setCharacterEncoding("UTF-8");                                ServletActionContext.getResponse().getWriter().print(s);                                return;                        } else {                                int total = 0;                                int luck_group = 0;                                sql = "select count(*)as totalCount from lucky_dog";                                resultSet = dbManager.executeQuery(sql);                                if (resultSet.next()) {                                        total = resultSet.getInt("totalCount");                                }// 得到抽奖表中的记录数                                if (total < 8) {                                        luck_group = 3;// 三等奖8个                                } else if (total < 13) {                                        luck_group = 2;// 二等奖5个                                } else if (total < 16) {                                        luck_group = 1;// 一等奖3个                                } else {                                        System.out.println("抽奖总数已满！！！");                                        String s = "{\"name\":\"提示\",\"age\":\"totaloverflowerror\"}";                                        ServletActionContext.getResponse().setCharacterEncoding(                                                        "UTF-8");                                        ServletActionContext.getResponse().getWriter().print(s);                                        return;                                }                                sql = "insert into lucky_dog (luck_num,luck_group)values("                                                + luck_dog.getLuck_num() + "," + luck_group + ")";                                boolean result = dbManager.insertSQL(sql);                                if (result) {                                        String s = "{\"name\":\"提示\",\"age\":\"success\"}";                                        ServletActionContext.getResponse().setCharacterEncoding(                                                        "UTF-8");                                        ServletActionContext.getResponse().getWriter().print(s);                                        System.out.println("抽奖数据已经写入数据库");                                } else {                                        System.out.println("抽奖数据写入失败");                                }                        }                } catch (Exception e) {                        // TODO: handle exception                } finally {                        dbManager.closeConnection();                 }         }         public void view_result() {                System.out.println("view_resultview_resultview_result");                DBManager dbManager = new DBManager();                String sql = "select * from lucky_dog";                luck_dog luck_dog = null;                ResultSet resultSet = dbManager.executeQuery(sql);                List luck_dogList = new ArrayList();                try {                        while (resultSet.next()) {                                luck_dog = new luck_dog();                                luck_dog.setId(resultSet.getInt("id"));                                luck_dog.setLuck_group(resultSet.getInt("luck_group"));                                luck_dog.setLuck_num(resultSet.getInt("luck_num"));                                luck_dogList.add(luck_dog);                        }                        JSONArray jsonArray = JSONArray.fromObject(luck_dogList);                        System.out.println(jsonArray);                        // String s = "{\"name\":\"提示\",\"age\":\"已提交抢答申请，请静候抢答结果！！！\"}";                        ServletActionContext.getResponse().setCharacterEncoding("UTF-8");                        ServletActionContext.getResponse().getWriter().print(jsonArray);                } catch (Exception e) {                        // TODO: handle exception                        e.printStackTrace();                } finally {                        dbManager.closeConnection();                 }         } }

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