使用HttpClient进行资源下载和压缩，提供终端版本和web版本实现

HttpClient使用时需要的包如下

commons-httpclient-3.1.jarcommons-logging-1.0.4.jarcommons-codec-1.2.jar

终端版本

package TestHttpclient;import java.io.BufferedOutputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.methods.GetMethod;public class App {public static void main(String[] args) throws IOException {// 多个文件打包下载String[] uris = {"http://b.55show.com/uploads/day_20090308/face_1EIeBR.gif","http://b.55show.com/uploads/day_20090308/face_hXAI5T.gif","http://b.55show.com/uploads/day_20090307/face_EdALSr.gif" };OutputStream os = new FileOutputStream("C:/Users/Steven.Yang/temp.zip");ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(os));HttpClient hc = new HttpClient();GetMethod gm = null;for (String uri : uris) {gm = new GetMethod(uri);hc.executeMethod(gm);InputStream is = gm.getResponseBodyAsStream();int signIndex = uri.lastIndexOf("/");String name = uri.substring(signIndex + 1);out.putNextEntry(new ZipEntry(name));int c = -1;while ((c = is.read()) != -1) {out.write(c);}is.close();}out.flush();out.close();// 单个文件下载// String uri = "http://192.168.1.3:8080/TgsPic/kakou.jpg";//// HttpClient hc = new HttpClient();// GetMethod gm = new GetMethod(uri);//// hc.executeMethod(gm);//// InputStream is = gm.getResponseBodyAsStream();// OutputStream os = new// FileOutputStream("C:/Users/Steven.Yang/temp.jpg");//// int c = -1;// while ((c = is.read()) != -1) {// os.write(c);// }// is.close();// os.flush();// os.close();}}

web servlet版本

package cn.steven.servlet;import java.io.BufferedOutputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import java.net.URLEncoder;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.methods.GetMethod;public class Downloadservlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("application/zip");String filename = URLEncoder.encode("test测试test.zip", "UTF-8");response.setHeader("Content-disposition", "attachment; filename="+ filename + ";");// 多个文件打包下载String[] uris = {"http://b.55show.com/uploads/day_20090308/face_1EIeBR.gif","http://b.55show.com/uploads/day_20090308/face_hXAI5T.gif","http://b.55show.com/uploads/day_20090307/face_EdALSr.gif" };// OutputStream os = new// FileOutputStream("C:/Users/Steven.Yang/temp.zip");ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));HttpClient hc = new HttpClient();GetMethod gm = null;for (String uri : uris) {gm = new GetMethod(uri);hc.executeMethod(gm);InputStream is = gm.getResponseBodyAsStream();int signIndex = uri.lastIndexOf("/");String name = uri.substring(signIndex + 1);out.putNextEntry(new ZipEntry(name));int c = -1;while ((c = is.read()) != -1) {out.write(c);}is.close();}out.flush();out.close();}}