📄 fileuploadservlet.java

📁 使用jsp+Servlet,采用MVC模式,实现了一典型小型电子商务网站的全过程.包括前台和后台的全部功能.适合于初学者学习使用.
💻 JAVA
字号:
package com.eshop.servlet.manager.product;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.GregorianCalendar;
import java.util.Iterator;
import java.util.List;

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

import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;

public class FileUploadServlet extends HttpServlet {

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

		doPost(request,response);
	}

	/**
	 * 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 {

		String uploadPath = "D:\\Tomcat 5.5\\webapps\\e-shop\\productPic\\"; // 上传文件的目录
	    String tempPath = "D:\\Tomcat 5.5\\webapps\\e-shop\\productPic\\temp\\"; // 临时文件目录
		DiskFileUpload fu = new DiskFileUpload();
	    // 设置最大文件尺寸，这里是4MB
	    fu.setSizeMax(4194304);
	    // 设置缓冲区大小，这里是4kb
	    fu.setSizeThreshold(4096);
	    // 设置临时目录：
	    fu.setRepositoryPath(tempPath);
	    // 得到所有的文件：
	    List fileItems;
		try {
			fileItems = fu.parseRequest(request);
			 Iterator i = fileItems.iterator();
			 String time = "";
			    String strExtend = "";
			    while(i.hasNext()) {
			            
			                SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmssSSS");
			                GregorianCalendar cal = new GregorianCalendar();
			                time = formatter.format(cal.getTime());            
			                FileItem fi = (FileItem)i.next();
			                // 获得文件名，这个文件名包括路径：
			                String fileName = fi.getName();
			                int j=0;
			                j=fileName.lastIndexOf('.');
			                strExtend = fileName.substring(j,fileName.length());
			                
			                // 在这里可以记录用户和文件信息
			                // ...
			                // 写入文件，暂定文件名为a.txt，可以从fileName中提取文件名：
			                try {
								fi.write(new File(uploadPath + time + strExtend));
								response.setCharacterEncoding("gbk");
					            response
					            .getWriter()
					            .write(
					                "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gbk\" /><html><script language=\"javascript\">window.location.href=\"../manager/fileupload/fileUpload.jsp?product_pic=" + time + strExtend + "\"</script></html>");
							} catch (Exception e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
							//String product_pic=time + strExtend;
							/*request.setAttribute("product_pic", product_pic);
							RequestDispatcher requestDisptcher=request.getRequestDispatcher("../manager/fileupload/fileUpload.jsp");
							requestDisptcher.forward(request, response);*/
							response.setCharacterEncoding("gbk");
				            response
				            .getWriter()
				            .write(
				                "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gbk\" /><html><script language=\"javascript\">window.location.href=\"../manager/fileupload/fileUpload.jsp?product_pic=" + time + strExtend + "\"</script></html>");
		}} catch (FileUploadException e1) {
			 
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
	   
	     // 依次处理每一个文件：
	   
	             
	          
	}

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

}
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