mybookaction.java

基于java/mysql的图书管理系统,主要使用的技术有java+jsp+tomcat+mysql+eclipse jdk版本1.6.0

//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.0/xslt/JavaClass.xsl

package com.zyuntao.struts.action;

import javax.servlet.http.*;
import java.sql.*;
import java.util.*;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.zyuntao.struts.form.*;
import com.zyuntao.struts.model.*;
/** 
 * MyEclipse Struts
 * Creation date: 04-04-2006
 * 
 * XDoclet definition:
 * @struts.action input="/user.jsp"
 * @struts.action-forward name="success" path="/mybook.jsp"
 */
public class MybookAction extends Action {

	// --------------------------------------------------------- Instance Variables

	// --------------------------------------------------------- Methods

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) throws SQLException{
HttpSession session=request.getSession();
		if(session.getAttribute("username")!=null)
		{
			String username=(String)session.getValue("username");
			BookManager bm=new BookManager();
			Collection BookForm=new LinkedList();
			BookForm=bm.mybook(username);
			
			
			ActionMessages messages= new ActionMessages();
			if(BookForm!=null)
			{   
				request.setAttribute("BookForm",BookForm);
				return mapping.findForward("success");
			}
			
			messages.add("nobook", new ActionMessage("error.book.no"));
			saveMessages(request, messages);
			return mapping.getInputForward();
			
			
		}
		return mapping.findForward("index");
	}

}