03_java基础之综合练习与考核评估
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25.综合练习之车站业务分析
完成步骤:
需求: 以车站业务对车票做增删改查操作
1.建立数据库
2.建立车票表
3.建立java项目结构(model\\dao\\service\\test)
4.创建model
5.创建dao(接口和实现)并实现测试
6.创建service(接口实现)
26.综合练习之数据库与表建立
27.项目标准结构创建
28\\29\\30\\31.综合练习之代码实现
1.model
1 package com.day03.station.model; 2 3 /** 4 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 5 * 疑问咨询wx:851298348 6 */ 7 public class Ticket { 8 private Integer id; 9 private String startStation; 10 private String stopStation; 11 private String startTime; 12 private Integer ticketPrice; 13 14 public Integer getId() { 15 return id; 16 } 17 18 public void setId(Integer id) { 19 this.id = id; 20 } 21 22 public String getStartStation() { 23 return startStation; 24 } 25 26 public void setStartStation(String startStation) { 27 this.startStation = startStation; 28 } 29 30 public String getStopStation() { 31 return stopStation; 32 } 33 34 public void setStopStation(String stopStation) { 35 this.stopStation = stopStation; 36 } 37 38 public String getStartTime() { 39 return startTime; 40 } 41 42 public void setStartTime(String startTime) { 43 this.startTime = startTime; 44 } 45 46 public Integer getTicketPrice() { 47 return ticketPrice; 48 } 49 50 public void setTicketPrice(Integer ticketPrice) { 51 this.ticketPrice = ticketPrice; 52 } 53 }
2.dao接口
1 package com.day03.station.dao; 2 3 import com.day03.station.model.Ticket; 4 5 import java.util.List; 6 7 /** 8 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 9 * 疑问咨询wx:851298348 10 */ 11 public interface ITicketDao { 12 //增加 13 public void save(Ticket ticket); 14 //删除 根据id删除 15 public void delete(Integer id); 16 17 //修改 18 public void update(Ticket ticket); 19 //查找 查单个 根据id查询 20 public Ticket queryById(Integer id); 21 //查找多个 （集合装）List 22 public List<Ticket> queryAll(); 23 }
3.dao实现
1 package com.day03.station.dao.impl; 2 3 import com.day03.station.dao.ITicketDao; 4 import com.day03.station.model.Ticket; 5 6 import java.sql.Connection; 7 import java.sql.DriverManager; 8 import java.sql.PreparedStatement; 9 import java.sql.ResultSet; 10 import java.util.ArrayList; 11 import java.util.List; 12 13 /** 14 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 15 * 疑问咨询wx:851298348 16 */ 17 public class TicketDao implements ITicketDao { 18 @Override 19 public void save(Ticket ticket) { 20 21 try { 22 23 //1.加载 24 Class.forName("com.mysql.jdbc.Driver"); 25 //2.链接 26 Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/station_data", "root", "admin"); 27 //3.创建编译语句 28 String sql="INSERT INTO ticket (start_station,stop_station,start_time,ticket_price) VALUES (?,?,?,?)"; 29 PreparedStatement preparedStatement = connection.prepareStatement(sql); 30 //设置参数 31 preparedStatement.setString(1,ticket.getStartStation()); 32 preparedStatement.setString(2,ticket.getStopStation()); 33 preparedStatement.setString(3,ticket.getStartTime()); 34 preparedStatement.setInt(4,ticket.getTicketPrice()); 35 //4.执行 36 preparedStatement.executeUpdate(); 37 //5.释放资源 38 preparedStatement.close(); 39 connection.close(); 40 } catch (Exception e) { 41 e.printStackTrace(); 42 } 43 44 } 45 46 @Override 47 public void delete(Integer id) { 48 try { 49 50 //1.加载 51 Class.forName("com.mysql.jdbc.Driver"); 52 //2.链接 53 Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/station_data", "root", "admin"); 54 //3.创建编译语句 55 String sql="DELETE FROM ticket WHERE id=?"; 56 PreparedStatement preparedStatement = connection.prepareStatement(sql); 57 //设置参数 58 preparedStatement.setInt(1,id); 59 //4.执行 60 preparedStatement.executeUpdate(); 61 //5.释放资源 62 preparedStatement.close(); 63 connection.close(); 64 } catch (Exception e) { 65 e.printStackTrace(); 66 } 67 } 68 69 @Override 70 public void update(Ticket ticket) { 71 try { 72 73 //1.加载 74 Class.forName("com.mysql.jdbc.Driver"); 75 //2.链接 76 Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/station_data", "root", "admin"); 77 //3.创建编译语句 78 String sql="UPDATE ticket SET ticket_price=? WHERE id=?"; 79 PreparedStatement preparedStatement = connection.prepareStatement(sql); 80 //设置参数 81 preparedStatement.setInt(1,ticket.getTicketPrice()); 82 preparedStatement.setInt(2,ticket.getId()); 83 84 //4.执行 85 preparedStatement.executeUpdate(); 86 //5.释放资源 87 preparedStatement.close(); 88 connection.close(); 89 } catch (Exception e) { 90 e.printStackTrace(); 91 } 92 } 93 94 @Override 95 public Ticket queryById(Integer id) { 96 //准备一个对象,装获取到的结果数据 97 Ticket ticket = new Ticket(); 98 try { 99 100 //1.加载 101 Class.forName("com.mysql.jdbc.Driver"); 102 //2.链接 103 Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/station_data", "root", "admin"); 104 //3.创建编译语句 105 String sql="SELECT id,start_station,stop_station,start_time,ticket_price FROM ticket WHERE id=?"; 106 PreparedStatement preparedStatement = connection.prepareStatement(sql); 107 //设置参数 108 preparedStatement.setInt(1,id); 109 //4.执行 110 ResultSet resultSet = preparedStatement.executeQuery(); 111 //解析结果集 112 while (resultSet.next()){ 113 //取id 114 int id1 = resultSet.getInt("id"); 115 //取开始车站 116 String startStation = resultSet.getString("start_station"); 117 //取到达车站 118 String stopStation = resultSet.getString("stop_station"); 119 //取发车时间 120 String startTime = resultSet.getString("start_time"); 121 //取车票价格 122 int ticketPrice = resultSet.getInt("ticket_price"); 123 //封装到对象里面去 124 ticket.setId(id1); 125 ticket.setStartStation(startStation); 126 ticket.setStopStation(stopStation); 127 ticket.setStartTime(startTime); 128 ticket.setTicketPrice(ticketPrice); 129 130 } 131 132 //5.释放资源 133 preparedStatement.close(); 134 connection.close(); 135 } catch (Exception e) { 136 e.printStackTrace(); 137 } 138 return ticket; 139 } 140 141 @Override 142 public List<Ticket> queryAll() { 143 //准备一个对象,装获取到的结果数据 144 //Ticket ticket = new Ticket(); 145 //准备一个可以装多个对象的对象来装多个车票对象==>集合对象List 146 List<Ticket> list=new ArrayList<>(); 147 //list.add(); 添加 148 //list.get(); 取 149 try { 150 151 //1.加载 152 Class.forName("com.mysql.jdbc.Driver"); 153 //2.链接 154 Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/station_data", "root", "admin"); 155 //3.创建编译语句 156 String sql="SELECT id,start_station,stop_station,start_time,ticket_price FROM ticket"; 157 PreparedStatement preparedStatement = connection.prepareStatement(sql); 158 //设置参数 159 160 //4.执行 161 ResultSet resultSet = preparedStatement.executeQuery(); 162 //解析结果集 163 while (resultSet.next()){ 164 //取id 165 int id1 = resultSet.getInt("id"); 166 //取开始车站 167 String startStation = resultSet.getString("start_station"); 168 //取到达车站 169 String stopStation = resultSet.getString("stop_station"); 170 //取发车时间 171 String startTime = resultSet.getString("start_time"); 172 //取车票价格 173 int ticketPrice = resultSet.getInt("ticket_price"); 174 //封装到对象里面去 175 Ticket ticket = new Ticket(); 176 ticket.setId(id1); 177 ticket.setStartStation(startStation); 178 ticket.setStopStation(stopStation); 179 ticket.setStartTime(startTime); 180 ticket.setTicketPrice(ticketPrice); 181 182 //将车票对象装入集合对象里面 183 list.add(ticket); 184 185 } 186 187 //5.释放资源 188 preparedStatement.close(); 189 connection.close(); 190 } catch (Exception e) { 191 e.printStackTrace(); 192 } 193 return list; 194 } 195 }
4.dao测试
1 package com.day03.station.testDao; 2 3 import com.day03.station.dao.impl.TicketDao; 4 import com.day03.station.model.Ticket; 5 import org.junit.Test; 6 7 import java.util.List; 8 9 /** 10 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 11 * 疑问咨询wx:851298348 12 */ 13 public class TestTicketDao { 14 TicketDao ticketDao = new TicketDao(); 15 //测试车票保存 16 @Test 17 public void testSave(){ 18 //1.创建dao对象 19 //TicketDao ticketDao = new TicketDao(); 20 //2.调用dao方法 21 Ticket ticket = new Ticket(); 22 //赋值 23 ticket.setStartStation("南充"); 24 ticket.setStopStation("成都"); 25 ticket.setStartTime("2018-05-20 13:14:00"); 26 ticket.setTicketPrice(99); 27 ticketDao.save(ticket); 28 } 29 @Test 30 public void testDelete(){ 31 ticketDao.delete(5); 32 } 33 @Test 34 public void testUpdate(){ 35 Ticket ticket = new Ticket(); 36 ticket.setTicketPrice(120); 37 ticket.setId(2); 38 ticketDao.update(ticket); 39 } 40 @Test 41 public void testQueryById(){ 42 Ticket ticket = ticketDao.queryById(2); 43 System.out.println("ticket="+ticket); 44 } 45 @Test 46 public void testQuery(){ 47 List<Ticket> tickets = ticketDao.queryAll(); 48 System.out.println("tickets="+tickets); 49 50 } 51 52 }
5.service接口
1 package com.day03.station.service; 2 3 import com.day03.station.model.Ticket; 4 5 import java.util.List; 6 7 /** 8 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 9 * 疑问咨询wx:851298348 10 */ 11 public interface ITicketService { 12 //增加 13 public void save(Ticket ticket); 14 //删除 根据id删除 15 public void delete(Integer id); 16 17 //修改 18 public void update(Ticket ticket); 19 //查找 查单个 根据id查询 20 public Ticket queryById(Integer id); 21 //查找多个 （集合装）List 22 public List<Ticket> queryAll(); 23 }
6.service实现
1 package com.day03.station.service.impl; 2 3 import com.day03.station.dao.impl.TicketDao; 4 import com.day03.station.model.Ticket; 5 import com.day03.station.service.ITicketService; 6 7 import java.util.List; 8 9 /** 10 * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html 11 * 疑问咨询wx:851298348 12 */ 13 public class TicketService implements ITicketService { 14 TicketDao ticketDao = new TicketDao(); 15 16 @Override 17 public void save(Ticket ticket) { 18 //1.创建dao对象 19 //TicketDao ticketDao = new TicketDao(); 20 //2.调用dao方法 21 ticketDao.save(ticket); 22 } 23 24 @Override 25 public void delete(Integer id) { 26 ticketDao.delete(id); 27 } 28 29 @Override 30 public void update(Ticket ticket) { 31 ticketDao.update(ticket); 32 } 33 34 @Override 35 public Ticket queryById(Integer id) { 36 Ticket ticket = ticketDao.queryById(id); 37 38 return ticket; 39 } 40 41 @Override 42 public List<Ticket> queryAll() { 43 List<Ticket> tickets = ticketDao.queryAll(); 44 45 return tickets; 46 } 47 }
7.项目完成后的结构
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