package com.huawei.download; import java.io.File; import java.io.FileInputStream; 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 org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipOutputStream; public class DownLoadAction extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; /** * Constructor of the object. */ public DownLoadAction() { 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(); out .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.print(" This is "); out.print(this.getClass()); out.println(", using the GET method"); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close(); } /** * 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 { response.reset(); response.setContentType("APPLICATION/zip"); response.setHeader("Content-Disposition", "attachment; filename=data.zip"); File file = new File("D:\\testdata"); File[] files = file.listFiles(); FileInputStream fileInputStream = null; ZipOutputStream outputStream = new ZipOutputStream(response .getOutputStream()); for (File file2 : files) { fileInputStream = new FileInputStream(file2); outputStream.putNextEntry(new ZipEntry("test/" + file2.getName())); byte[] bytes = new byte[1024]; int i = 0; while ((i = fileInputStream.read(bytes)) != -1) { outputStream.write(bytes, 0, i); } outputStream.flush(); outputStream.closeEntry(); fileInputStream.close(); } outputStream.flush(); outputStream.close(); } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { // Put your code here } }
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