day04_JDBC_课后练习

案例：

1、创建数据库

创建数据库：day04_test01_bookstore

2、创建如下表格

（1）图书表books

（2）用户表users

（3）订单表orders

（4）订单明细表order_items

3、添加模拟数据

使用sql语句在命令行或SQLyog中添加一些模拟数据

表books：

表users：

表orders：

表order_items：

#创建数据库
CREATE DATABASE `day04_test01_bookstore` CHARACTER SET utf8;USE `day04_test01_bookstore`;#创建表
CREATE TABLE `books` (`id` INT(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,`title` VARCHAR(100) NOT NULL,`author` VARCHAR(100) NOT NULL,`price` DOUBLE(11,2) NOT NULL,`sales` INT(11) NOT NULL,`stock` INT(11) NOT NULL,`img_path` VARCHAR(100) NOT NULL
) ENGINE=INNODB AUTO_INCREMENT=31 DEFAULT CHARSET=utf8;/*Data for the table `books` */
INSERT  INTO `books`(`id`,`title`,`author`,`price`,`sales`,`stock`,`img_path`) VALUES 
(1,'解忧杂货店','东野圭吾',27.20,102,98,'upload/books/解忧杂货店.jpg'),
(2,'边城','沈从文',23.00,102,98,'upload/books/边城.jpg'),
(3,'中国哲学史','冯友兰',44.50,101,99,'upload/books/中国哲学史.jpg'),
(4,'忽然七日',' 劳伦',19.33,101,99,'upload/books/忽然七日.jpg'),
(5,'苏东坡传','林语堂',19.30,100,100,'upload/books/苏东坡传.jpg'),
(6,'百年孤独','马尔克斯',29.50,100,100,'upload/books/百年孤独.jpg'),
(7,'扶桑','严歌苓',19.80,100,100,'upload/books/扶桑.jpg'),
(8,'给孩子的诗','北岛',22.20,100,100,'upload/books/给孩子的诗.jpg'),
(9,'为奴十二年','所罗门',16.50,100,100,'upload/books/为奴十二年.jpg'),
(10,'平凡的世界','路遥',55.00,100,100,'upload/books/平凡的世界.jpg'),
(11,'悟空传','今何在',14.00,100,100,'upload/books/悟空传.jpg'),
(12,'硬派健身','斌卡',31.20,100,100,'upload/books/硬派健身.jpg'),
(13,'从晚清到民国','唐德刚',39.90,100,100,'upload/books/从晚清到民国.jpg'),
(14,'三体','刘慈欣',56.50,100,100,'upload/books/三体.jpg'),
(15,'看见','柴静',19.50,100,100,'upload/books/看见.jpg'),
(16,'活着','余华',11.00,100,100,'upload/books/活着.jpg'),
(17,'小王子','安托万',19.20,100,100,'upload/books/小王子.jpg'),
(18,'我们仨','杨绛',11.30,100,100,'upload/books/我们仨.jpg'),
(19,'生命不息,折腾不止','罗永浩',25.20,100,100,'upload/books/生命不息.jpg'),
(20,'皮囊','蔡崇达',23.90,100,100,'upload/books/皮囊.jpg'),
(21,'恰到好处的幸福','毕淑敏',16.40,100,100,'upload/books/恰到好处的幸福.jpg'),
(22,'大数据预测','埃里克',37.20,100,100,'upload/books/大数据预测.jpg'),
(23,'人月神话','布鲁克斯',55.90,100,100,'upload/books/人月神话.jpg'),
(24,'C语言入门经典','霍尔顿',45.00,100,100,'upload/books/C语言入门经典.jpg'),
(25,'数学之美','吴军',29.90,100,100,'upload/books/数学之美.jpg'),
(26,'Java编程思想','埃史尔',70.50,100,100,'upload/books/Java编程思想.jpg'),
(27,'设计模式之禅','秦小波',20.20,100,100,'upload/books/设计模式之禅.jpg'),
(28,'图解机器学习','杉山将',33.80,100,100,'upload/books/图解机器学习.jpg'),
(29,'艾伦图灵传','安德鲁',47.20,100,100,'upload/books/艾伦图灵传.jpg'),
(30,'教父','马里奥普佐',29.00,100,100,'upload/books/教父.jpg');CREATE TABLE `users` (`id` INT(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,`username` VARCHAR(100) UNIQUE KEY NOT NULL,`password` VARCHAR(100) NOT NULL,`email` VARCHAR(100) DEFAULT NULL
) ENGINE=INNODB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;/*Data for the table `users` */
INSERT  INTO `users`(`id`,`username`,`password`,`email`) VALUES(1,'admin',PASSWORD('123456'),'admin@atguigu.com'),(2,'admin2',PASSWORD('123456'),'admin2@atguigu.com'),(3,'admin3',PASSWORD('123456'),'admin3@atguigu.com'),(4,'chai',PASSWORD('123'),'chai@atguigu.com');CREATE TABLE `orders` (`id` VARCHAR(100) PRIMARY KEY NOT NULL,`order_time` DATETIME NOT NULL,`total_count` INT(11) NOT NULL,`total_amount` DOUBLE(11,2) NOT NULL,`state` INT(11) NOT NULL,`user_id` INT(11) NOT NULL,CONSTRAINT `orders_users_id_fk` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=INNODB DEFAULT CHARSET=utf8;/*Data for the table `orders` */
INSERT  INTO `orders`(`id`,`order_time`,`total_count`,`total_amount`,`state`,`user_id`) VALUES 
('15275760194821','2018-05-29 14:40:19',4,114.03,2,1),
('15294258455691','2018-06-20 00:30:45',2,50.20,0,1);CREATE TABLE `order_items` (`id` INT(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,`count` INT(11) NOT NULL,`amount` DOUBLE(11,2) NOT NULL,`title` VARCHAR(100) NOT NULL,`author` VARCHAR(100) NOT NULL,`price` DOUBLE(11,2) NOT NULL,`img_path` VARCHAR(100) NOT NULL,`order_id` VARCHAR(100) NOT NULL,CONSTRAINT `order_items_orders_id_fk` FOREIGN KEY (`order_id`) REFERENCES `orders` (`id`) ON DELETE CASCADE
) ENGINE=INNODB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;/*Data for the table `order_items` */
INSERT  INTO `order_items`
(`id`,`count`,`amount`,`title`,`author`,`price`,`img_path`,`order_id`) VALUES 
(1,1,27.20,'解忧杂货店','东野圭吾',27.20,'static/img/default.jpg','15275760194821'),
(2,1,23.00,'边城','沈从文',23.00,'static/img/default.jpg','15275760194821'),
(3,1,44.50,'中国哲学史','冯友兰',44.50,'static/img/default.jpg','15275760194821'),
(4,1,19.33,'忽然七日',' 劳伦',19.33,'static/img/default.jpg','15275760194821'),
(5,1,27.20,'解忧杂货店','东野圭吾',27.20,'static/img/default.jpg','15294258455691'),
(6,1,23.00,'边城','沈从文',23.00,'static/img/default.jpg','15294258455691');

4、搭建开发环境，准备各个工具组件

（1）使用druid（德鲁伊）数据库连接池

引入jar： druid-1.1.10.jar 和 mysql-connector-java-5.1.36-bin.jar

编写配置文件druid.properties（根据你自己的实际情况，作适当修改）

url=jdbc:mysql://localhost:3306/day04_test01_bookstore
username=root
password=1234
driverClassName=com.mysql.jdbc.Driver
initialSize=10
maxActive=50
minIdle=10
maxWait=1000

（2）使用尚硅谷的JDBCTools工具类（直接拿过去用，不用自己写）

package com.atguigu.utils;import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;import javax.sql.DataSource;import com.alibaba.druid.pool.DruidDataSourceFactory;/** 获取连接或释放连接的工具类*/
public class JDBCTools {// 1、创建数据源,即连接池private static DataSource dataSource;// 2、创建ThreadLocal对象private static ThreadLocal<Connection> threadLocal;static {try {//1、读取druip.properties文件Properties pro = new Properties();pro.load(JDBCTools.class.getClassLoader().getResourceAsStream("druid.properties"));//2、连接连接池dataSource = DruidDataSourceFactory.createDataSource(pro);//3、创建线程池threadLocal = new ThreadLocal<>();} catch (Exception e) {e.printStackTrace();}}/*** 获取连接的方法* * @return* @throws SQLException*/public static Connection getConnection() {// 从线程中获取连接Connection connection = threadLocal.get();if (connection == null) {// 从连接池中获取一个连接try {connection = dataSource.getConnection();// 将连接与当前线程绑定threadLocal.set(connection);} catch (SQLException e) {e.printStackTrace();}}return connection;}/*** 释放连接的方法* * @param connection*/public static void releaseConnection() {// 获取当前线程中的连接Connection connection = threadLocal.get();if (connection != null) {try {connection.close();// 将已经关闭的连接从当前线程中移除threadLocal.remove();} catch (SQLException e) {e.printStackTrace();}}}
}

（3）使用尚硅谷的BasicDAO（直接拿过去用，不用自己写）

package com.atguigu.dao.impl;import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;import com.atguigu.utils.JDBCTools;/*** 定义一个用来被继承的对数据库进行基本操作的Dao*/
public abstract class BasicDAO<T> {private QueryRunner queryRunner = new QueryRunner();// 定义一个变量来接收泛型的类型private Class<T> type;// 获取T的Class对象，获取泛型的类型，泛型是在被子类继承时才确定public BasicDAO() {// 获取子类的类型Class clazz = this.getClass();// 获取父类的类型// getGenericSuperclass()用来获取当前类的父类的类型// ParameterizedType表示的是带泛型的类型ParameterizedType parameterizedType = (ParameterizedType) clazz.getGenericSuperclass();// 获取具体的泛型类型 getActualTypeArguments获取具体的泛型的类型// 这个方法会返回一个Type的数组Type[] types = parameterizedType.getActualTypeArguments();// 获取具体的泛型的类型·this.type = (Class<T>) types[0];}/*** 通用的增删改操作* * @param sql* @param params* @return*/public int update(String sql, Object... params) {// 获取连接Connection connection = JDBCTools.getConnection();int count = 0;try {count = queryRunner.update(connection, sql, params);} catch (SQLException e) {//将编译时异常转换为运行时异常向上抛throw new RuntimeException(e);}return count;}/*** 获取一个对象* * @param sql* @param params* @return*/public T getBean(String sql, Object... params) {// 获取连接Connection connection = JDBCTools.getConnection();T t = null;try {t = queryRunner.query(connection, sql, new BeanHandler<T>(type), params);} catch (SQLException e) {//将编译时异常转换为运行时异常向上抛throw new RuntimeException(e);}return t;}/*** 获取所有对象* * @param sql* @param params* @return*/public List<T> getBeanList(String sql, Object... params) {// 获取连接Connection connection = JDBCTools.getConnection();List<T> list = null;try {list = queryRunner.query(connection, sql, new BeanListHandler<T>(type), params);} catch (SQLException e) {//将编译时异常转换为运行时异常向上抛throw new RuntimeException(e);} return list;}/*** 获取一个单一值的方法，专门用来执行像select count(*)... 这样的sql语句* * @param sql* @param params* @return*/public Object getSingleValue(String sql, Object... params) {// 获取连接Connection connection = JDBCTools.getConnection();Object count = null;try {count = queryRunner.query(connection, sql, new ScalarHandler(), params);} catch (SQLException e) {//将编译时异常转换为运行时异常向上抛throw new RuntimeException(e);}return count;}/*** 进行批处理的方法* 关于二维数组Object[][] params* 		二维数组的第一维是sql语句要执行的次数* 		二维数组的第二维就是每条sql语句中要填充的占位符* * @param sql* @param params*/public void batchUpdate(String sql , Object[][] params){//获取连接Connection connection = JDBCTools.getConnection();try {int[] batch = queryRunner.batch(connection ,sql, params);} catch (SQLException e) {//将编译时异常转换为运行时异常向上抛throw new RuntimeException(e);}}
}

（4）使用Apache的commons-dbutils组件的QueryRunner等

引入jar：commons-dbutils-1.6.jar

（5）使用尚硅谷的Page分页小工具类（直接拿过去用，不用自己写）

package com.atguigu.utils;import java.util.List;public class Page<T> {private List<T> list; // 每页查询出来的数据存放的集合public static final int PAGE_SIZE = 4; // 每页显示的记录数private int pageNo; // 当前页，通过用户传入private int totalRecord; //总记录数，通过查询数据库得到private String path; //设置请求的地址public String getPath() {return path;}public void setPath(String path) {this.path = path;}public List<T> getList() {return list;}public void setList(List<T> list) {this.list = list;}public int getPageNo() {if (pageNo < 1) {// 如果当前页码小于1，直接返回1return 1;}else if(getTotalPageNo() == 0){return 1;} else if (pageNo > getTotalPageNo()) {// 如果当前页码大于总页数，返回总页数return getTotalPageNo();} else {return pageNo;}}public void setPageNo(int pageNo) {this.pageNo = pageNo;}// 总页数是由总记录数和每页显示的条数计算得到public int getTotalPageNo() {if (totalRecord % PAGE_SIZE == 0) {return totalRecord / PAGE_SIZE;} else {return totalRecord / PAGE_SIZE + 1;}}public int getTotalRecord() {return totalRecord;}public void setTotalRecord(int totalRecord) {this.totalRecord = totalRecord;}public static int getPageSize() {return PAGE_SIZE;}// 判断是否有上一页public boolean hasPrev() {return getPageNo() > 1;}// 获取上一页public int getPrev() {return hasPrev() ? getPageNo() - 1 : 1;}// 判断是否有下一页public boolean hasNext() {return getPageNo() < getTotalPageNo();}// 获取下一页public int getNext() {return hasNext() ? getPageNo() + 1 : getTotalPageNo();}
}

5、自己编写表格对应的实体类

（1）User类

（2）Book类

（3）Order类

（4）OrderItem类

6、自己实现如下接口

接口直接拿过去，自己编写DAO接口的实现类

（1）UserDAO

package com.atguigu.dao;import com.atguigu.bean.User;public interface UserDAO {/*** 根据用户名和密码获取数据库中的记录* @param user User 该用户对象中保存了登录时填写的用户名和密码* @return User：如果用户名和密码正确返回User对象的完整信息，如果用户名或密码不正确，则返回null*/public User getUser(User user);/*** 根据用户名获取数据库中的记录* @param username String 该用户对象中保存了注册时新添加的用户名* @return true：用户名已存在， false：用户名不存在，说明该可用*/public boolean checkUserName(String username);/*** 将新用户保存到数据库* @param user User 该用户对象中保存了注册时新添加的用户所有信息*/public void saveUser(User user);
}

（2）BookDAO

package com.atguigu.dao;import java.util.List;import com.atguigu.bean.Book;
import com.atguigu.utils.Page;public interface BookDAO {/*** 添加图书的方法* @param book Book 一本新添加的图书对象*/public void addBook(Book book);/*** 根据图书的id删除图书的方法* @param bookId String 图书编号，这里用String类型是因为从Web客户端传过来的数据都是String类型的*/public void deleteBookById(String bookId);/*** 根据图书的id获取图书信息* @param bookId String 图书编号，这里用String类型是因为从Web客户端传过来的数据都是String类型的* @return*/public Book getBookById(String bookId);/*** 更新图书信息的方法* @param book Book 该对象中包含了一本图书的完整信息，其中部分属性可能是新修改的，部分属性是保留原来的*/public void updateBook(Book book);/*** 获取所有图书的方法* * @return List<Book> 所有图书*/public List<Book> getBooks();/*** 获取带分页的所有图书信息* @param page Page<Book> 传入是一个带页码（即你要查询第几页），但不包含Book对象的page对象* @return 返回的page对象是包含所有属性的page对象*/public Page<Book> getPageBooks(Page<Book> page);/*** 根据价格范围获取带分页的图书信息* * @param page Page<Book> 传入是一个带页码（即你要查询第几页），但不包含Book对象的page对象* @param minPrice double 价格区间范围的左边界* @param maxPrice double 价格区间范围的右边界* @return Page<Book> 返回的page对象是包含所有属性的page对象*/public Page<Book> getPageBooksByPrice(Page<Book> page, double minPrice, double maxPrice);/*** 批量更新图书的库存和销量* @param params Object[][] 其中行数是代表修改几本数，每一个行包含三个数据，bookid，库存量，销量*/public void batchUpdateSalesAndStock(Object[][] params);
}

（3）OrderDAO

package com.atguigu.dao;import java.util.List;import com.atguigu.bean.Order;public interface OrderDAO {/*** 保存订单的方法* @param order Order 包含新订单的信息*/public void saveOrder(Order order);/*** 获取我的订单的方法* @param userId int 用户编号* @return List<Order> 当前用户的所有订单*/public List<Order> getMyOrders(int userId);
}

（4）OrderItemDAO

package com.atguigu.dao;import java.util.List;import com.atguigu.bean.OrderItem;public interface OrderItemDAO {/*** 根据订单号获取对应的订单项* * @param orderId String 订单编号* @return List<OrderItem> 该订单的订单明细*/public List<OrderItem> getOrderItemsByOrderId(String orderId);/*** 批量插入订单项的方法* @param params Object[][] 行数就是有几项订单项，每一行就是一条订单明细记录*/public void batchInsertOrderItems(Object[][] params);
}

7、使用如下测试类进行测试

（1）UserDAOTest.java

package com.atguig.test;import java.util.Scanner;import org.junit.Test;import com.atguigu.bean.User;
import com.atguigu.dao.UserDAO;
import com.atguigu.dao.impl.UserDAOImpl;public class UserDAOTest {private UserDAO ud = new UserDAOImpl();/** 登录测试*/@Testpublic void test01(){Scanner input = new Scanner(System.in);System.out.println("----登录----");System.out.print("用户名：");String username = input.nextLine();System.out.print("密码：");String password = input.nextLine();User user = new User(username,password);user = ud.getUser(user);if(user == null){System.out.println("登录失败，用户名或密码错误");}else{System.out.println("登录成功：" + user);}input.close();}/** 注册测试*/@Testpublic void test02(){Scanner input = new Scanner(System.in);System.out.println("----注册----");String username;while(true){System.out.print("用户名：");username = input.nextLine();if(ud.checkUserName(username)==false){break;}else{System.out.println("用户名已存在，请重写输入");}}System.out.print("密码：");String password = input.nextLine();System.out.print("邮箱：");String email = input.nextLine();try {User user = new User(username,password,email);ud.saveUser(user);System.out.println("注册成功");} catch (Exception e) {System.out.println("注册失败，原因：" + e.getMessage());}input.close();}
}

（2）BookDAOTest.java

package com.atguig.test;import java.util.List;
import java.util.Scanner;import org.junit.Test;import com.atguigu.bean.Book;
import com.atguigu.dao.BookDAO;
import com.atguigu.dao.impl.BookDAOImpl;
import com.atguigu.utils.Page;public class BookDAOTest {private BookDAO bd = new BookDAOImpl();/** 测试添加图书*/@Testpublic void test01(){Scanner input = new Scanner(System.in);System.out.print("请输入书名：");String title = input.nextLine();System.out.print("请输入作者：");String author = input.nextLine();System.out.print("请输入价格：");double price = input.nextDouble();System.out.print("请输入库存量：");int stock = input.nextInt();input.nextLine();System.out.print("请输入图片路径(例如：upload/books/从入门到精通.jpg：");String imgPath = input.nextLine();try {Book book = new Book(title, author, price, 0, stock, imgPath);bd.addBook(book);System.out.println("添加成功");} catch (Exception e) {System.out.println("添加失败，原因：" + e.getMessage());}input.close();}/** 测试修改图书*/@Testpublic void test02(){List<Book> books = bd.getBooks();for (Book book : books) {System.out.println(book);}Scanner input = new Scanner(System.in);System.out.print("请选择你要修改的图书的编号：");String bookId = input.nextLine();Book book = bd.getBookById(bookId);System.out.println("直接回车表示该项不修改");System.out.print("请输入书名("+book.getTitle()+")：");String title = input.nextLine();if (title.length() != 0){book.setTitle(title);}System.out.print("请输入作者("+book.getAuthor()+")：");String author = input.nextLine();if (author.length() != 0){book.setAuthor(author);}System.out.print("请输入价格("+book.getPrice()+")：");String strPrice = input.nextLine();if(strPrice.length() != 0){book.setPrice(Double.parseDouble(strPrice));}System.out.print("请输入库存量("+book.getStock()+")：");String stockStr = input.nextLine();if(stockStr.length() != 0){book.setStock(Integer.parseInt(stockStr));}System.out.print("请输入图片路径("+book.getImgPath()+")：");String imgPath = input.nextLine();if(imgPath.length() != 0){book.setImgPath(imgPath);}try {bd.updateBook(book);System.out.println("修改成功");} catch (Exception e) {System.out.println("修改失败，原因：" + e.getMessage());}input.close();}/** 测试删除图书*/@Testpublic void test03(){List<Book> books = bd.getBooks();for (Book book : books) {System.out.println(book);}Scanner input = new Scanner(System.in);System.out.print("请选择你要修改的图书的编号：");String bookId = input.nextLine();try {bd.deleteBookById(bookId);System.out.println("删除成功");} catch (Exception e) {System.out.println("删除失败，原因：" + e.getMessage());}input.close();}/** 测试图书查询，分页*/@Testpublic void test04(){Scanner input = new Scanner(System.in);Page<Book> page = new Page<>();page.setPageNo(1);boolean flag = true;while(flag){Page<Book> pageBooks = bd.getPageBooks(page);List<Book> list = pageBooks.getList();System.out.println("一共：" + page.getTotalPageNo() + "页，当前是第" + page.getPageNo() + "页");for (Book book : list) {System.out.println(book);}System.out.print("请选择页码：");int pageNo = input.nextInt();page = new Page<>();page.setPageNo(pageNo);}input.close();}/** 测试图书查询，分页，并加价格筛选*/@Testpublic void test05(){Scanner input = new Scanner(System.in);System.out.println("请输入价格范围：");System.out.print("最低价格：");double minPrice = input.nextDouble();System.out.print("最高价格：");double maxPrice = input.nextDouble();Page<Book> page = new Page<>();page.setPageNo(1);boolean flag = true;while(flag){Page<Book> pageBooks = bd.getPageBooksByPrice(page, minPrice, maxPrice);if(page.getTotalPageNo() == 0){System.out.println("该范围没有数据");break;}List<Book> list = pageBooks.getList();System.out.println("一共：" + page.getTotalPageNo() + "页，当前是第" + page.getPageNo() + "页");for (Book book : list) {System.out.println(book);}System.out.print("请选择页码：");int pageNo = input.nextInt();page = new Page<>();page.setPageNo(pageNo);}input.close();}
}

（3）OrderDAOTest.java

package com.atguig.test;import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;import org.junit.AfterClass;
import org.junit.Before;
import org.junit.Test;import com.atguigu.bean.Book;
import com.atguigu.bean.Order;
import com.atguigu.bean.User;
import com.atguigu.dao.BookDAO;
import com.atguigu.dao.OrderDAO;
import com.atguigu.dao.OrderItemDAO;
import com.atguigu.dao.UserDAO;
import com.atguigu.dao.impl.BookDAOImpl;
import com.atguigu.dao.impl.OrderDAOImpl;
import com.atguigu.dao.impl.OrderItemDAOImpl;
import com.atguigu.dao.impl.UserDAOImpl;public class OrderDAOTest {private UserDAO ud = new UserDAOImpl();private OrderDAO od = new OrderDAOImpl();private OrderItemDAO oid = new OrderItemDAOImpl();private BookDAO bd = new BookDAOImpl();private User login;private static Scanner input = new Scanner(System.in);/** 测试登录*/@Beforepublic void test01(){System.out.println("----登录----");System.out.print("用户名：");String username = input.nextLine();System.out.print("密码：");String password = input.nextLine();User user = new User(username,password);login = ud.getUser(user);if(login == null){System.out.println("登录失败，用户名或密码错误");}else{System.out.println("登录成功：" + login);}}/** 测试查看某个用户查看自己的订单信息*/@Testpublic void test02(){if(login == null){System.out.println("请先登录");return;}List<Order> myOrders = od.getMyOrders(login.getId());for (Order order : myOrders) {System.out.println(order);}}/** 模拟购物和结算*/@Testpublic void test03(){if(login == null){System.out.println("请先登录");return;}List<Book> books = bd.getBooks();for (Book book : books) {System.out.println(book);}//因为没有更丰富的图形化界面支持，如果同一个本书买了两本，即输入两次相同id,当做两件商品来算System.out.print("请输入你要购买的图书的编号，用空格分割：");String str = input.nextLine();String[] ids = str.split(" ");//模拟购物车ArrayList<Book> list = new ArrayList<>();double totalAmount = 0;for (String bookId : ids) {Book book = bd.getBookById(bookId);list.add(book);totalAmount += book.getPrice(); }//1、保存一个订单long time = System.currentTimeMillis();//获取当前系统时间距离1970-1-1 0:0:0 0毫秒的毫秒数String orderId = time + "" + login.getId();Order order = new Order(orderId, new Date(), list.size(), totalAmount, 0, login.getId());od.saveOrder(order);//2、保存所有的订单明细//3、更新该订单中的图书的销量和库存量//count,amount,title,author,price,img_path,order_id//sales = ? , stock = ? where id = ?";Object[][] arr1 = new Object[list.size()][7];Object[][] arr2 = new Object[list.size()][3];for (int i = 0; i < list.size(); i++) {Book book = list.get(i);arr1[i][0] = 1;arr1[i][1] = book.getPrice()*1;arr1[i][2] = book.getTitle();arr1[i][3] = book.getAuthor();arr1[i][4] = book.getPrice();arr1[i][5] = book.getImgPath();arr1[i][6] = order.getId();arr2[i][0] = book.getSales() + 1;arr2[i][1] = book.getStock() - 1;arr2[i][2] = book.getId();}//批量添加订单明细oid.batchInsertOrderItems(arr1);//批量更新图书的销量和库存量bd.batchUpdateSalesAndStock(arr2);}@AfterClasspublic static void test04(){input.close();}
}