import com.sonalb.net.http.cookie.*; 
import java.net.*; 
import java.io.*; 
... 
public class Example 
{ 
... 
public void someMethod() 
{ 
... 
URL url = new URL("http://www.site.com/"); 
HttpURLConnection hUC = (HttpURLConnection) url.openConnection(); 
//在這里初始化HttpURLConnection. 
... 
huc.connect(); 
InputStream is = huc.getInputStream(); 
Client client = new Client(); 
CookieJar cj = client.getCookies(huc); 
//進(jìn)行一些處理 
... 
huc.disconnect(); 
// 執(zhí)行另一請(qǐng)求 
url = new URL("http://www.site.com/"); 
huc = (HttpURLConnection) url.openConnection(); 
client.setCookies(huc, cj); 
huc.connect(); 
... 
// 進(jìn)行一些處理 
} 
} 

package com.sonalb.net.http; 
import com.sonalb.net.http.cookie.*; 
import java.net.*; 
import java.io.*; 
public class HTTPRedirectHandler 
{ 
... 
public HTTPRedirectHandler(HttpURLConnection huc) 
{ 
... 
} 
public void connect() throws IOException 
{ 
if(bConnected) 
{ 
throw new IllegalStateException("No can do. Already connected."); 
} 
int code; 
URL url; 
huc.setFollowRedirects(false); 
// 設(shè)置在Cookies中的檢驗(yàn) 
if(!cj.isEmpty()) 
{ 
client.setCookies(huc,cj); 
} 
is = huc.getInputStream(); 
// 從HttpURLConnection中提取Cookies并加到CookieJar中去 
cj.addAll(Client.getCookies(huc)); 
while((code = huc.getResponseCode()) != successCode && maxRedirects > 0) 
{ 
if(code != 302) 
{ 
throw new IOException("Can't deal with this code (" + code + ")."); 
} 
is.close(); 
is = null; 
url = new URL(huc.getHeaderField("location")); 
huc.disconnect(); 
huc = null; 
huc = (HttpURLConnection) url.openConnection(); 
//和HTTP請(qǐng)求一起發(fā)送Cookies 
Client.setCookies(huc, cj); 
huc.setFollowRedirects(false); 
huc.connect(); 
is = huc.getInputStream(); 
//從響應(yīng)中提取Cookies并加進(jìn)jar中去 
cj.addAll(Client.getCookies(huc)); 
maxRedirects--; 
} 
if(maxRedirects <= 0 && code != successCode) 
{ 
throw new IOException("Max redirects exhausted."); 
} 
bConnected = true; 
} 
//其他方法在這里出現(xiàn) 
public void handleCookies(boolean b) 
{ 
... 
} 
public void setSuccessCode(int i) 
{ 
... 
} 
public void setCookieJar(CookieJar cj) 
{ 
... 
} 
public void addCookies(CookieJar cj) 
{ 
... 
} 
public CookieJar getCookieJar() 
{ 
... 
} 
public HttpURLConnection getConnection() 
{ 
... 
} 
public void setMaxRedirects(int i) 
{ 
... 
}  
} 

public boolean doLogin() throws Exception 
{ 
//對(duì)于HTTPS初始化JSSE 
System.getProperties().put("java.protocol.handler.pkgs","com.sun.net.ssl.internal.www.protocol"); 
java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider()); 
//創(chuàng)建HttpURLConnection并初始化 
URL url = new URL("https://lc2.law13.hotmail.passport.com/cgi-bin/dologin"); 
HttpURLConnection huc = (HttpURLConnection) url.openConnection(); 
huc.setDoOutput(true); 
huc.setRequestMethod("POST"); 
huc.setRequestProperty("User-Agent","Mozilla/4.7 [en] (Win98; I)"); 
//發(fā)送登錄表單字段 
StringBuffer sb = new StringBuffer(); 
sb.append("login="); sb.append(URLEncoder.encode(user)); 
... 
OutputStream os = huc.getOutputStream(); 
os.write(sb.toString().getBytes("US-ASCII")); 
os.close(); 
//創(chuàng)建句柄并進(jìn)行處理 
HTTPRedirectHandler hrh = new HTTPRedirectHandler(huc); 
hrh.connect(); 
huc = hrh.getConnection(); 
//Microsoft有一個(gè)中間過渡頁使用了一個(gè)刷新元標(biāo)簽以便于在HTTPS和HTTP間轉(zhuǎn)換，這將防止安全 
//警告彈出 
//我們需要通過讀取響應(yīng)和解析URL手動(dòng)取出URL 
BufferedReader br = new BufferedReader(new InputStreamReader(huc.getInputStream())); 
... 
//一旦我們有了主頁的URL，我們就又使用HTTPRedirectHandler重定向并處理響應(yīng)以校驗(yàn)正確的注 
//冊(cè) 
url = new URL(homeUrl); 
huc = (HttpURLConnection) url.openConnection(); 
huc.setRequestProperty("User-Agent","Mozilla/4.7 [en] (Win98; I)"); 
hrh = new HTTPRedirectHandler(huc); 
hrh.setCookieJar(cj); 
hrh.connect(); 
... 
//保存Cookies用于以后的請(qǐng)求 
cj.addAll(hrh.getCookieJar()); 
... 
return(bLoggedIn); 
} 

import java.io.*; 
import org.w3c.tidy.*; 
public class ConvertBadHTMLToGood 
{ 
... 
public ConvertBadHTMLToGood(Reader r) 
{ 
if(r == null) 
{ 
throw new IllegalArgumentException(); 
} 
inReader = r; 
} 
public Reader doConvert() throws IOException 
{ 
//初始化JTidy對(duì)象 
Tidy tidy = new Tidy(); 
tidy.setXmlOut(true); 
tidy.setErrout(new PrintWriter(new StringWriter())); 
//JTidy解析器要求一個(gè)InputStream，對(duì)于我的知識(shí)來說這里沒有直接的辦法將一個(gè)Reader轉(zhuǎn)換 
//成一個(gè)InputStream。這個(gè)工作區(qū)代碼沒有字符編碼安全，但還可以混過。 
BufferedReader br = new BufferedReader(inReader); 
StringBuffer sb = new StringBuffer(); 
String line; 
while((line = br.readLine()) != null) 
{ 
sb.append(line); 
sb.append(""); 
} 
ByteArrayInputStream bais = new ByteArrayInputStream(sb.toString().getBytes("US-ASCII")); 
ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
//作一個(gè)將HTML轉(zhuǎn)換well-formed HTML 的預(yù)備。 
tidy.parse(bais, baos); 
//整理一些遺漏的JTidy得到能被“true-blue”XML解析器解析的輸出。 
FixEntities fe = new FixEntities(baos.toString()); 
return(fe.getFixedReader()); 
} 

import com.sonalb.net.http.cookie.*; 
... 
public class HotmailChecker 
{ 
public static void main(String args[]) throws Exception 
{ 
if(args.length != 2) 
{ 
usage(); 
System.exit(0); 
} 
String uname = args[0]; 
String pass = args[1]; 
HotmailChecker hmc = new HotmailChecker(uname,pass); 
if(!hmc.doLogin()) 
{ 
System.out.println("Could not login to Hotmail."); 
System.exit(0); 
} 
Vector newMessages = hmc.getNewMessages(); 
if(newMessages == null) 
{ 
System.out.println("No NEW Messages."); 
return; 
} 
System.out.println("You have " + newMessages.size() + " NEW Messages"); 
System.out.println("---------------------------------------------"); 
Iterator iter = newMessages.iterator(); 
//HMMessage封裝了一個(gè)Hotmail消息 
HMMessage hm; 
while(iter.hasNext()) 
{ 
hm = (HMMessage) iter.next(); 
System.out.println(" From: " + hm.getFrom()); 
System.out.println(" Subject: " + hm.getSubject()); 
System.out.println("Sent Date: " + hm.getSentDate()); 
System.out.println("---------------------------------------------"); 
} 
} 
static void usage() 
{ 
System.out.println("Usage: java HotmailChecker  "); 
} 
//實(shí)例變量和方法從這里開始 
... 
public HotmailChecker(String username, String passWord) 
{ 
... 
} 
public boolean doLogin() throws Exception 
{ 
... 
} 
public Vector getNewMessages() throws Exception 
{ 
... 
} 
... 
} 

（出處：http://m.survivalescaperooms.com）