- package com.hongyuan.test;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.net.HttpURLConnection;
- import java.net.MalformedURLException;
- import java.net.URL;
- import java.net.URLDecoder;
- public class FileDownload {
- public static final String LOCAL_PATH="d:/";
- public static void main(String[] args) {
- //待下载文件地址
- String fileUrl="http://211.162.55.16/cdn.baidupcs.com/file/6a73dab7c03023a9835cc737f447674d?xcode=af6ffdc43a44169bac968d32c4bd420084a9a97c308112c9&fid=3255571826-250528-130564002&time=1397293108&sign=FDTAXER-DCb740ccc5511e5e8fedcff06b081203-mQkOeRDtXpyQWwYJkI%2BxKJpxn5k%3D&to=cb&fm=N,B,U,nc&newver=1&expires=1397297563&rt=sh&r=854979042&logid=1751715936&sh=1&vuk=3255571826&fn=web%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1%20%E7%AC%AC5%E7%89%88.pdf&wshc_tag=0&wsiphost=ipdbm";
- InputStream in=null;
- OutputStream out=null;
- HttpURLConnection conn=null;
- String fileName=null;
- try {
- //初始化连接
- URL url=new URL(fileUrl);
- conn = (HttpURLConnection) url.openConnection();
- conn.setDoInput(true);
- conn.setDoOutput(true);
- //获取文件名
- String disposition=conn.getHeaderField("Content-Disposition");
- if(disposition!=null&&!"".equals(disposition)){
- //从头中获取文件名
- fileName=disposition.split(";")[1].split("=")[1].replaceAll("\\"","");
- }else{
- //从地址中获取文件名
- fileName=fileUrl.substring(fileUrl.lastIndexOf("/")+1);
- }
- if(fileName!=null&&!"".equals(fileName)){
- //文件名解码
- fileName=URLDecoder.decode(fileName, "utf-8");
- }else{
- //如果无法获取文件名,则随机生成一个
- fileName="file_"+(int)(Math.random()*10);
- }
- //读取数据
- if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){
- byte[] buffer=new byte[2048];
- in = conn.getInputStream();
- out=new FileOutputStream(new File(LOCAL_PATH,fileName));
- int count=0;
- int finished=0;
- int size=conn.getContentLength();
- while((count=in.read(buffer))!=-1){
- if(count!=0){
- out.write(buffer,0,count);
- finished+=count;
- System.out.printf("########################################---->%1$.2f%%\\n",(double)finished/size*100);
- }else{
- break;
- }
- }
- }
- } catch (MalformedURLException e) {
- e.printStackTrace();
- } catch (IOException e) {
- e.printStackTrace();
- }finally{
- try {
- out.close();
- in.close();
- conn.disconnect();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/1606201512864.html
来源: http://www.codesnippet.cn/detail/1606201512864.html