Java實(shí)戰(zhàn)之晚會抽獎系統(tǒng)的實(shí)現(xiàn)

更新時間：2022年03月14日 16:11:25 作者：qq_1334611189

這篇文章主要介紹了如何利用Java語言編寫一個晚會抽獎系統(tǒng)，文中采用到的技術(shù)有Jdbc、Servlert、JavaScript、JQuery、Ajax等，感興趣的可以學(xué)習(xí)一下

一、項(xiàng)目運(yùn)行

環(huán)境配置：

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

項(xiàng)目技術(shù)：

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

二、效果圖

三、核心代碼

管理員登陸控制層

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("登陸成功");
			ActionContext.getContext().getSession().put("admin", admin);
			return "success";
		}else {
			ActionContext.getContext().getSession().put("message", "登錄失敗");
			return "failed";
		}
		} catch (Exception e) {
			e.printStackTrace();
			ActionContext.getContext().getSession().put("message", "登錄失敗");
			// 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;
	}
}

抽獎控制層一二三等獎設(shè)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("這個號碼已經(jīng)中過獎?。。?);
				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");
				}// 得到抽獎表中的記錄數(shù)
				if (total < 8) {
					luck_group = 3;// 三等獎8個
				} else if (total < 13) {
					luck_group = 2;// 二等獎5個
				} else if (total < 16) {
					luck_group = 1;// 一等獎3個
				} else {
					System.out.println("抽獎總數(shù)已滿?。?！");
					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("抽獎數(shù)據(jù)已經(jīng)寫入數(shù)據(jù)庫");
				} else {
					System.out.println("抽獎數(shù)據(jù)寫入失敗");
				}
			}
		} 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\":\"已提交搶答申請，請靜候搶答結(jié)果！?。"}";
			ServletActionContext.getResponse().setCharacterEncoding("UTF-8");
			ServletActionContext.getResponse().getWriter().print(jsonArray);
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		} finally {
			dbManager.closeConnection();
 
		}
 
	}
 
}

搶答控制層

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("這個號碼已經(jīng)中過獎?。。?);
				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");
				}// 得到抽獎表中的記錄數(shù)
				if (total < 8) {
					luck_group = 3;// 三等獎8個
				} else if (total < 13) {
					luck_group = 2;// 二等獎5個
				} else if (total < 16) {
					luck_group = 1;// 一等獎3個
				} else {
					System.out.println("抽獎總數(shù)已滿?。?！");
					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("抽獎數(shù)據(jù)已經(jīng)寫入數(shù)據(jù)庫");
				} else {
					System.out.println("抽獎數(shù)據(jù)寫入失敗");
				}
			}
		} 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\":\"已提交搶答申請，請靜候搶答結(jié)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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