student_classes.jsp

来自「< J2EE应用开发详解>>一书全部的源代码. 本书基于J」· JSP 代码 · 共 39 行

<%@ page import="java.io.IOException,java.util.*,javax.naming.*,javax.servlet.*,
javax.servlet.http.*,java.rmi.*,javax.rmi.PortableRemoteObject,javax.ejb.*,com.j2ee14.ch17.*"%>
<%@ page contentType="text/html;charset=gb2312"%>
<%
		try {
			// 创建初始上下文。并且查找EJB Home接口。
			Context ctx = new InitialContext();
			StudentLocal student = null;		
		    ClassesLocal classes = null;
			StudentLocalHome studentHome = (StudentLocalHome)ctx.lookup("ejb/StudentEJB");
		    ClassesLocalHome classesHome = (ClassesLocalHome)ctx.lookup("ejb/ClassesEJB");					
		    
            classes=classesHome.findByPrimaryKey("classes1");		    
		    Collection students=new ArrayList();		    
		    for(int i=0;i<5;i++)
		    {
		       student=studentHome.findByPrimaryKey("hellking"+i);
		       student.setClasses(classes);
		       students.add(student);
		    }		    
		    classes.setStudents(students);    	
		    out.println("<br>测试从student获得classes信息...");
		    out.println("<br>student.classes.id:"+student.getClasses().getId());	   
		    out.println("<br>student.classes.name:"+student.getClasses().getName());
		    out.println("<hr>获得Classes的所有Student的id...");		   
		   
		    Iterator it=classes.getAllStudentsId().iterator();
		    while(it.hasNext())
		    {
		      out.println(it.next());
		      out.println("<br>");
		     }
		    
		}
		catch (Exception e) {
			out.println("<br>发生异常!"+e);
			e.printStackTrace();
		}		
%>