EJB3.0——jsp网页调用

很多学者对EJB3.0的有状态会话Bean和无状态会话Bean的概念不太清楚，通过本人这次上机实验，本人搞清楚了有状态会话Bean和无状态会话Bean的区别，同时利用无状态会话bean和有状态会话Bean实现了相关的实例。希望对大家能够有点用。本例子中包含有状态会话Bean实现简易的购物车。

package stateFullBean;

public class BookException extends Exception{
	String str;
	public BookException（String s）
	{
		str=s;
	}
	public String getString（）
	{
		return str;
	}
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件      156672  2008-04-24 22:18  EJB上机实验实验报告.doc
     目录           0  2008-04-24 01:05  stateBean_web\
     文件         340  2008-04-24 01:05  stateBean_web\.classpath
     目录           0  2008-04-24 01:05  stateBean_web\.myeclipse\
     文件         312  2008-04-24 01:05  stateBean_web\.mymetadata
     文件        1231  2008-04-22 10:12  stateBean_web\.project
     目录           0  2008-04-24 01:05  stateBean_web\src\
     目录           0  2008-04-24 01:05  stateBean_web\WebRoot\
     文件         866  2008-04-22 10:17  stateBean_web\WebRoot\index.jsp
     目录           0  2008-04-24 01:05  stateBean_web\WebRoot\meta-INF\
     文件          39  2008-04-22 10:10  stateBean_web\WebRoot\meta-INF\MANIFEST.MF
     文件        5564  2008-04-24 21:49  stateBean_web\WebRoot\statefull.jsp
     文件        2507  2008-04-22 10:20  stateBean_web\WebRoot\stateless.jsp
     目录           0  2008-04-24 01:05  stateBean_web\WebRoot\WEB-INF\
     目录           0  2008-04-24 01:05  stateBean_web\WebRoot\WEB-INF\classes\
     目录           0  2008-04-24 01:05  stateBean_web\WebRoot\WEB-INF\lib\
     文件         375  2008-04-24 01:05  stateBean_web\WebRoot\WEB-INF\web.xml
     目录           0  2008-04-24 00:56  stateFullBean\
     文件         346  2008-04-22 10:00  stateFullBean\.classpath
     目录           0  2008-04-24 00:56  stateFullBean\.myeclipse\
     文件         177  2008-04-24 00:58  stateFullBean\.mymetadata
     文件        1138  2008-04-22 10:40  stateFullBean\.project
     目录           0  2008-04-24 00:58  stateFullBean\classes\
     目录           0  2008-04-24 00:58  stateFullBean\classes\meta-INF\
     文件          39  2008-04-22 10:00  stateFullBean\classes\meta-INF\MANIFEST.MF
     目录           0  2008-04-24 00:58  stateFullBean\classes\stateFullBean\
     文件         487  2008-04-24 18:00  stateFullBean\classes\stateFullBean\BookException.class
     文件        2014  2008-04-24 01:10  stateFullBean\classes\stateFullBean\Cart.class
     文件         522  2008-04-24 01:10  stateFullBean\classes\stateFullBean\CartRemote.class
     文件         412  2008-04-24 01:10  stateFullBean\classes\stateFullBean\IdVerifier.class
     目录           0  2008-04-24 00:56  stateFullBean\src\
............此处省略24个文件信息