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##Bookshelf javaee program ###Preparation: * install mysql * install gradle * github repository ### Description * BookShelf是一个可以添加图书和浏览图书的程序，通过读取输入文件，将文件中的图书信息保存起来，并且可以浏览所有图书，另外还可以通过指定条件查找图书。 * 每条记录的格式为：ISBN,bookName,price,author ### Requirement 1. 使用servlet完成HTML Form，不能使用jsp, 只能使用print得到表单，表单行为是添加一本书的信息 ISBN: int, bookName: string, price: double, author: string 步骤： - gradle servlet - web.xml servletname and mapping - servlet 实现doget dopost 2. 将图书信息Write to DB 步骤： - mysql中新建book表 - $mysqld开启mysql服务 - $mysql -u root -p bookshelf进入数据库命令行 - $source create-db.sql - 使用DriverManager连接数据库 3. JDBC: DataSource DBCP BasicDatasource 优点 - JNDI - ConnectionPool mysql: - show databases; - use database; - show tables; 把basicDatasource放在ServletContext,在app启动的时候，listener监听到后注册进去 1.Servlet处理表单（表单内容为BookShelf中的一个Book的信息），保存到MySQL数据库里面（使用javax.sql.Datasource） 2.用另一个Servlet从数据库中读取所有Book的信息，再通过JSP显示出来 3.将Datasource放在自己的容器里面，以此来模拟IoC容器。将该容器放在ServletContext或者Servlet中，两者的区别是什么？ 4.只使用Spring的ClasspathXmlApplicationContext来存放该Datasource，然后将其放在ServletContext中让Servlet访问。 记得频繁提交哦。 作业： 1. display/add book用datasource实现 2. datasource 放在 serveltcontext 3. 自己的spring容器classpath app context, 通过getBean的方式拿出来，注入到 servletContext的attribute中 ClassPathXMLApplicationContext Spring: IOC容器 事务处理 AOP 事件处理 application.xml servlet can access servlet context getattribute(); getBean(); Add/Display 都有一个datasource - - Factory 添加和删除attribute的时候都会触发listener 1. ServletContext级别 context listener Attribute可以放任何自定义的东西 2. Session级别 attribute 3. Request attribute JSP提供了EL ${books},会自动转换成getAttribute()

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