filedownload.java

一个完整的代码管理系统的源代码

package hunnu.edu.cn.product.servlet;
import hunnu.edu.cn.product.common.db.DBUtil;

import java.io.IOException;
import java.io.PrintWriter;

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


public class FileDownLoad extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * Constructor of the object.
	 */
	public FileDownLoad() {
		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 {
		
	  String file_stg_id =request.getParameter("file_stg_id");
	  String file_name = request.getParameter("file_name")+".zip";
	 
	
	  int file_id = Integer.parseInt(file_stg_id);
      try{
	   DBUtil.downLoadBlob(file_id, file_name, response);
      }catch(Exception e){
    	  
    	  
    	  System.out.println(e.getMessage());
      }
	}


	/**
	 * 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 {
          HttpSession session = request.getSession(true);
		 String pro_id=(String)session.getAttribute("pro_id");
		  if(pro_id!=null){
			  int id = Integer.parseInt(pro_id);
			  DBUtil.downLoadBAll(id, response);
		  }
	}

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

}