lendbookaction.java

这是图书管理系统 ~~用JSP实现的 大家要的可以

package jthink.action.user;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import jthink.bean.*;
import jthink.bean.db.*;
import jthink.util.*;
import java.util.*;
public class LendBookAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) {
        int users_ID=((UserBean)request.getSession().getAttribute("user")).getUsers_ID();
        int books_ID=Integer.parseInt(request.getParameter("books_ID"));
        int lendDay=Integer.parseInt(request.getParameter("lendDay"));
        String laction=request.getParameter("laction");
        LendBean lb=new LendBean();
        lb.setUsers_ID(users_ID);
        lb.setBooks_ID(books_ID);
        lb.setBookLend_StarTime(MyDate.getDate());
        MyDate md=new MyDate();
        String msg="";
       lb.setBookLend_EndTime(md.addDays(lb.getBookLend_StarTime(),lendDay));
       if(laction.equals("insert"))
       {
           DataBean db = new DataBean();
            msg = db.lendBooks(lb);
           db.Close();
       }else
       {
           msg="删除成功";
       }
        ArrayList list = (ArrayList) request.getSession().getAttribute("car");
       for(int i=0;i<list.size();i++)
       {
           BooksBean bsb=(BooksBean)list.get(i);
           if(bsb.getBooks_ID()==lb.getBooks_ID())
           {
               list.remove(i);
               break;
           }
       }
       request.setAttribute("lendMsg",msg);

        return mapping.findForward("car");
    }
}