addbook.java

JSP制作的一个在线书店 拥有简单的功能 请看看吧 初学者

package bookadmin;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import common.BookInfoBean;
import java.util.Calendar;;

public class AddBook extends HttpServlet{
    private static final String CONTENT_TYPE = "text/html; charset=GB2312";
    Calendar objCal;
    int hour;
    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        response.setCharacterEncoding("GB2312");
        request.setCharacterEncoding("GB2312");
        PrintWriter out = response.getWriter();
        HttpSession session = request.getSession();
        objCal = Calendar.getInstance();
        if (objCal.get(Calendar.AM_PM ) == objCal.get(Calendar.AM )) {
            hour = objCal.get(Calendar.HOUR) + 12;
        }
        String BookNo = "" + objCal.get(Calendar.YEAR) +
                        (objCal.get(Calendar.MONTH) + 1 ) +
                        objCal.get(Calendar.DATE) +  hour +
                        objCal.get(Calendar.MINUTE)  +
                        objCal.get(Calendar.SECOND)  +
                        objCal.get(Calendar.MILLISECOND);
        String BookName = request.getParameter("BookName");
        String BookType = request.getParameter("BookType");
        String author = request.getParameter("author");
        String book_concern = request.getParameter("book_concern");
        String image = null;
        if (session != null) {
            image = "upload\\" + session.getAttribute("picPath");
        } else {
            System.out.println("没有任何东西");
        }
        String introduc = request.getParameter("introduc");
        String BookCount = request.getParameter("addBookCount");
        String price = request.getParameter("addprice");

        common.BookInfoBean objB = new BookInfoBean();
        objB.setBookNo(BookType + BookNo);
        objB.setBookName(BookName);
        objB.setBookType(Integer.parseInt(BookType));
        objB.setAuthor(author);
        objB.setBook_concern(book_concern);
        if (image != null) {
            if (image.equals("") || image.length() == 0) {} else {
                objB.setImage(image);
            }
        }
        if (introduc != null) {
            if (introduc.equals("") || introduc.length() == 0) {} else {
                objB.setIntroduc(introduc);
        }
      }
        objB.setBookCount(Integer.parseInt(BookCount));
        objB.setPrice(Float.parseFloat(price));
        ConnBean.AddBookDB objAD = new ConnBean.AddBookDB();
        if (objAD.InsertDB(objB)) {
            Vector BookNoVector=(Vector)session.getAttribute("BookNo");
            if (BookNoVector==null)
            {
                BookNoVector=new Vector();
            }
            BookNoVector.addElement(objB.getBookNo());
            session.setAttribute("BookNo", BookNoVector);
            response.sendRedirect("AddbookSucceed.jsp");
        } else {
            response.sendRedirect("errorPage.jsp");
        }
        /*HttpSession session=request.getSession();
              session.setAttribute("BookName",BookName);
              session.setAttribute("BookType",BookType);
              session.setAttribute("Author",author);
              session.setAttribute("book_concern",book_concern);
              session.setAttribute("image",image);
              session.setAttribute("introduc",introduc);
              session.setAttribute("price",price);
              session.setAttribute("BookCount",BookCount); */
        out.close();
   }

   //Process the HTTP Post request
   public void doPost(HttpServletRequest request, HttpServletResponse response) throws
           ServletException, IOException {
       doGet(request, response);
           }

  //Clean up resources
  public void destroy() {
   }
}