updatebookservlet.java

一套网上书店系统采用JAVABEAN+SERVLET+JSP

package cn.dang.servlet;

import file_upload.File_upload;
import ghy_db.Conn_Manager;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.dang.entity.Author;
import cn.dang.entity.Book;
import cn.dang.entity.BookType;
import cn.dang.entity.Concem;
import cn.dang.service.AllService;

public class UpdateBookServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public UpdateBookServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		AllService ref = new AllService();
		Book book=new Book();
		try {
			// 创建文件上传对象
			File_upload File_upload_ref = new File_upload();
			//调用begin_upload()方法获得表单中的元素值并进行图片更新
			HashMap hm = File_upload_ref.begin_upload(request, response);
			//创建容器对象保存作者名字
			ArrayList values_list_author=new ArrayList();
			values_list_author.add(hm.get("authorName"));	
			//创建容器对象保存出版社名字
			ArrayList values_list_concem=new ArrayList();
			values_list_concem.add(hm.get("bookConcem"));
			//更新作者信息
			int aid=ref.getAuthorService().getAuthorIdByNameAndUpdate(values_list_concem);
			//更新出版社信息
			int cid=ref.getConcemService().getConcemIdByNameAndUpdate(values_list_concem);
			//创建容器对象保存书籍信息
			ArrayList values_list_book=new ArrayList();
			values_list_book.add(hm.get("bkName"));
			values_list_book.add(cid);
			values_list_book.add(hm.get("ISBN"));
			values_list_book.add(hm.get("publishTime"));
			values_list_book.add(hm.get("price"));
			values_list_book.add(hm.get("dangPrice"));
			values_list_book.add(hm.get("content"));
			values_list_book.add(aid);
			values_list_book.add(hm.get("cover"));
			values_list_book.add(hm.get("smallType2"));
			values_list_book.add(hm.get("bid"));
			//跟新书籍
			ref.getBookService().updateBookInfo(values_list_book);
			//如果所有更新操作成功进行事务提交
			Conn_Manager.transaction_commit();
			request.setAttribute("message", "更新书籍信息成功");
			request.setAttribute("msg", "返回操作书籍信息页面");
			request.setAttribute("rightBook", "../manager/rightBook.jsp");
			request.getRequestDispatcher("../manager/message.jsp").forward(request, response);
		} catch (Throwable e) {
			// TODO Auto-generated catch block
			Conn_Manager.transaction_rollback();
			e.printStackTrace();
		}
	}
	
	
	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}