student_course.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 50 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"%>
<%

		CourseLocal course = null;

		try {
			// 创建初始上下文。并且查找EJB Home接口。
			Context ctx = new InitialContext();
			
			StudentLocalHome studentHome = (StudentLocalHome)ctx.lookup("ejb/StudentEJB");
			CourseLocalHome courseHome = (CourseLocalHome)ctx.lookup("ejb/CourseEJB");						
		    
		    course=courseHome.findByPrimaryKey("course1");
		  	  
		    Collection courses=new ArrayList();
		    courses.add(course);
		    	    
		    Collection students=new ArrayList();		    
		    for(int i=0;i<5;i++)
		    {
		       StudentLocal student=studentHome.findByPrimaryKey("hellking"+i);
		        student.setCourses(courses);
		       students.add(student);
		    }		      
		    course.setStudents(students);
		    StudentLocal student2=studentHome.findByPrimaryKey("hellking1");
		    out.println("<br>测试从student获得course信息...");
		    Iterator it=student2.getAllCourseId().iterator();
		    while(it.hasNext())
		    {
		      out.println(it.next());
		      out.println("<br>");
		     }
		     
		      out.println("<hr>测试从course获得student信息...");
		     it=course.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();
		}		
%>