Java实战之晚会抽奖系统的实现
作者：qq_1334611189
这篇文章主要介绍了如何利用Java语言编写一个晚会抽奖系统，文中采用到的技术有Jdbc、Servlert、JavaScript、JQuery、Ajax等，感兴趣的可以学习一下
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();
}
}
}到此这篇关于Java实战之晚会抽奖系统的实现的文章就介绍到这了,更多相关Java抽奖系统内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！