网上购书系统

package struts.actions; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; 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 org.apache.struts.actions.DispatchAction; import spring.pojo.Books; import spring.pojo.User; import struts.beans.GotoBean; import dao.BookManagerDAO; public class BookManagerAction extends DispatchAction{ private BookManagerDAO bookManager; public ActionForward queryAllBooks(ActionMapping arg0, ActionForm arg1, HttpServletRequest arg2, HttpServletResponse arg3)throws Exception{ System.out.println("进入处理阶段"); GotoBean go=null;//用于输入文本框传参进行提取页面 int currentpage;//当前页 String catelog=arg2.getParameter("catelog");//分类标准 HttpSession session=arg2.getSession(false); if(null==catelog){//判断是是不是从输入文本传参进来，如果是,分类标准从session中提取 catelog=session.getAttribute("catelog").toString(); } if(arg1 instanceof GotoBean){//判断是不是从文本框中传参，如果是，转化为文本Bean go=(GotoBean)arg1; } if(null==go){//如果不是从文本框传参进行提取页面,那么直接读取其它方法的传参 currentpage=(Integer.valueOf(arg2.getParameter("goto"))); } else{//否则就从文本框中提取数据 currentpage=(Integer.valueOf(go.getGoes())); } if(currentpage<=0){//如果传来的参数是负数或者不合法，设置当前页为1 currentpage=1; } if(currentpage>=(bookManager.getPage().getPages()) && (bookManager.getPage().getPages())!=0){//如果传来的参数大于数据库中的记录的页数，就把页数设为最大页 currentpage=(bookManager.getPage()).getPages(); } System.out.println(catelog); if("0".equals(catelog)){//判断分类标准，0为无标准，即查询所有，否则根据数据库目录来分 String sql1="from Books"; String sql2="select count(*) from Books"; List<Books> list=bookManager.queryBook(currentpage, sql1, sql2); bookManager.getPage().setCurrentpage(currentpage); session.setAttribute("catelog", catelog); session.setAttribute("books",list); session.setAttribute("page", bookManager.getPage()); return arg0.findForward("BOOKSVIEW"); } else{//根据数据库目录来分 System.out.println(catelog+"1"); int catelog1=Integer.valueOf(catelog); String sql1="from Books where book_catelog="+catelog1; String sql2="select count(*) from Books where book_catelog="+catelog1; List<Books> list=bookManager.queryBook(currentpage, sql1, sql2); (bookManager.getPage()).setCurrentpage(currentpage); session.setAttribute("catelog", catelog); session.setAttribute("books",list); session.setAttribute("page", bookManager.getPage()); return arg0.findForward("BOOKSVIEW"); // } } } public ActionForward BuyBooks(ActionMapping arg0, ActionForm arg1, HttpServletRequest arg2, HttpServletResponse arg3)throws Exception{ System.out.println("进入购买!"); long book_id=Long.parseLong(arg2.getParameter("bookId")); // System.out.println(book_id); HttpSession session =arg2.getSession(false); if(session.getAttribute("user")==null){ return arg0.findForward("LOGIN"); } User user=(User) session.getAttribute("user"); Books book=bookManager.appendBook(book_id); user.getBookMap().put(book, 1); session.setAttribute("user", user); ActionMessages mess=new ActionMessages(); mess.add("AddOne",new ActionMessage("ShopCart.AddSuccess")); saveMessages(arg2,mess); return arg0.getInputForward(); // Iterator set=user.getBookSet().iterator(); // while(set.hasNext()){ // Books book1=(Books)set.next(); // System.out.println(book.getBookName()); // } } public BookManagerDAO getBookManager() { return bookManager; } public void setBookManager(BookManagerDAO bookManager) { this.bookManager = bookManager; } }