Java实战之晚会抽奖系统的实现

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_dog> luck_dogList = new ArrayList<luck_dog>();
		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_dog> luck_dogList = new ArrayList<luck_dog>();
		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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