productsaleservlet.java

该源代码实现了系统的进货

package servlet;

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

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

import operation.ComSaleOperation;

public class ProductSaleServlet extends HttpServlet
{

	/**
	 * Constructor of the object.
	 */
	public ProductSaleServlet()
	{
		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
	{

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
	}

	/**
	 * 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
	{

		request.setCharacterEncoding("gb2312");
		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
		
		HttpSession session=request.getSession();
		session.setAttribute("ProviderSaleList", null);
		ComSaleOperation cso=new ComSaleOperation();
		String ProductName=request.getParameter("ProductName");
		if(ProductName.equals("请选择------ "))
		{
			out.println("<script>alert('您没有选择查询条件!');window.location.href='ComEnterQuery.jsp';</script>");
		}
		else
		{
		ArrayList list=cso.getProductSaleInfo(ProductName);
		session.setAttribute("ProviderSaleList", list);
		RequestDispatcher requestDispatcher = request.getRequestDispatcher("ComSaleQuery.jsp");
		requestDispatcher.forward(request,response);
		
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException
	{
		// Put your code here
	}

}