多線程上傳和下載HttpURLConnection

1、0.操作說明：操作說明：1. 建議一個(gè) web 項(xiàng)目2.在運(yùn)行 main 方法前一定要現(xiàn)發(fā)布 web 項(xiàng)目， 以確保向服務(wù)器的連接可用1.利用利用 HttpURLConnection 進(jìn)行多線程下載進(jìn)行多線程下載package com.ykp.down;import java.io.IOException;import java.io.InputStream;import java.io.RandomAccessFile;import .HttpURLConnection;import .URL;/* 多線程下載* author 燕鯤鵬* version 1.0 2012-8-18*/publ

2、ic class Down public static void main(String args) throws Exception /1.聲明urlURL url = new URL(:8087/day26/aa.avi);/2.獲得連接HttpURLConnection con = (HttpURLConnection) url.openConnection();/3.設(shè)置請(qǐng)求的方式con.setRequestMethod(GET);/4.設(shè)置不緩存con.setUseCaches(false);/5.訪問成功了,獲得http狀態(tài)碼int code = co

3、n.getResponseCode();/6.對(duì)狀態(tài)嗎進(jìn)行判斷if(200 = code)/訪問成功/定義保存的文件名String fileName = E:/aa.avi;/從http頭信息獲得文件長(zhǎng)度int length = con.getContentLength();/聲明一個(gè)臨時(shí)文件RandomAccessFile file = new RandomAccessFile(fileName, rw);/設(shè)置文件大小file.setLength(length);/關(guān)閉臨時(shí)文件file.close();System.err.println(臨時(shí)文件的大小為：+length);/計(jì)算每個(gè)線程

4、應(yīng)該下載的大小int block = length/3=0?length/3:length/3+1;/啟動(dòng)三個(gè)線程for(int i=0;i+code);/斷開連接con.disconnect();4. 通過通過 post 方式來發(fā)送方式來發(fā)送，解決中文亂碼，解決中文亂碼1.java 源代碼package com.ykp.httpURLConnection;import java.io.InputStream;import java.io.OutputStream;import .HttpURLConnection;import .URL;import org.junit.Test;Testp

5、ublic void URLGet() throws Exception /獲得url對(duì)象URL url = new URL(http:/localhost:8087/day26/OneServlet?name=ykp燕鯤鵬);/通過.URL類來獲得httpUrlConnection對(duì)象，建立與服務(wù)器的連接,打開url的連接HttpURLConnection con = (HttpURLConnection) url.openConnection();/2、通過設(shè)置請(qǐng)求頭處理中文參數(shù)的亂碼con.setRequestProperty(Content-Type,application/x-www

6、-form-urlencoded);con.setRequestProperty(encoding, UTF-8);con.setRequestMethod(GET);con.setDoInput(true);con.setDoOutput(true);/獲得狀態(tài)碼，以表示請(qǐng)求完成int code = con.getResponseCode();if(code = 200)InputStream in = con.getInputStream();byte b = new byte1024;int len = 0;while(len=in.read(b)!=-1)System.err.prin

7、tln(new String(b, 0, len);/System.err.println(jjj);/斷開連接con.disconnect();/* 通過post方式來發(fā)送*/Testpublic void URLPost() throws Exception /獲得url對(duì)象URL url = new URL(http:/localhost:8087/day26/OneServlet?);/通過.URL類來獲得httpUrlConnection對(duì)象，建立與服務(wù)器的連接,打開url的連接HttpURLConnection con = (HttpURLConnection) url.openC

8、onnection();/2、通過設(shè)置請(qǐng)求頭處理中文參數(shù)的亂碼con.setRequestProperty(Content-Type,application/x-www-form-urlencoded);con.setRequestProperty(encoding, UTF-8);/設(shè)置相應(yīng)的方式為postcon.setRequestMethod(POST);/設(shè)置可以輸入和輸出con.setDoInput(true);con.setDoOutput(true);/獲得輸出流，來向服務(wù)器發(fā)送數(shù)據(jù)OutputStream out = con.getOutputStream();/向服務(wù)器發(fā)送數(shù)

9、據(jù)out.write(name=ykp&addr=hh北京.getBytes();/關(guān)閉輸出流out.close();/獲得狀態(tài)碼，以表示請(qǐng)求完成int code = con.getResponseCode();if(code = 200)/獲得輸入流，來接收服務(wù)器發(fā)送的數(shù)據(jù)InputStream in = con.getInputStream();byte b = new byte1024;int len = 0;/在客戶端輸出從服務(wù)器接收的數(shù)據(jù)while(len=in.read(b)!=-1)System.err.println(new String(b, 0, len);/Sys

10、tem.err.println(jjj);/斷開連接con.disconnect();2. servlet 源代碼package com.ykp.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class OneServlet e

11、xtends HttpServlet private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest request, HttpServletResponseresponse)throws ServletException, IOException request.setCharacterEncoding(UTF-8);System.err.println(OneServlet-get);String name = request.getParameter(name);System.err.println(name-+name);protected void doPost(HttpServletRequest request, HttpServletResponseresponse)throws ServletException, IOException request.setCharacterEncoding(UTF-8