您的位置:首页 > 运维架构 > 网站架构

Java模拟网站登录

2007-05-11 20:43 363 查看
web登陆无非就是网页获取,cookie 的管理,post和get方式的模拟。

1.网页内容获取
java.io.InputStream in;
java.net.URL url = new java.net.URL(www.xyz.com/content.html);
java.net.HttpURLConnection connection = (java.net.HttpURLConnection)
url.openConnection();
connection = (java.net.HttpURLConnection) url.openConnection();
//模拟成IE
connection.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
connection.connect();
in = connection.getInputStream();
java.io.BufferedReader breader =
new BufferedReader(new InputStreamReader(in , "GBK"));
String str=breader.readLine());
while(st != null){
System.out.println(str);
str=breader.readLine());
}
2.cookie管理

1.直接的方式
取得cookie:
HttpURLConnection huc= (HttpURLConnection) url.openConnection();
InputStream is = huc.getInputStream();
// 取得sessionID.
String cookieVal = hc.getHeaderField("Set-Cookie");
String sessionId;
if(cookieVal != null)
{
sessionId = cookieVal.substring(0, cookieVal.indexOf(";"));
}

发送设置cookie:
HttpURLConnection huc= (HttpURLConnection) url.openConnection();
if(sessionId != null)
{
huc.setRequestProperty("Cookie", sessionId);
}
InputStream is = huc.getInputStream();
2.利用的jcookie包(http://jcookie.sourceforge.net/ )
获取cookie:

URL url = new URL("http://www.site.com/");
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.connect();
InputStream is = huc.getInputStream();
Client client = new Client();
CookieJar cj = client.getCookies(huc);
新的请求,利用上面获取的cookie:

url = new URL("http://www.site.com/");
huc = (HttpURLConnection) url.openConnection();
client.setCookies(huc, cj);
3.post方式的模拟
URL url = new URL("www.xyz.com");
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
//设置允许output
huc.setDoOutput(true);
//设置为post方式
huc.setRequestMethod("POST");
huc.setRequestProperty("User-Agent","Mozilla/4.7 [en] (Win98; I)");
StringBuffer sb = new StringBuffer();
sb.append("userName="+userNme);
sb.append("&password="+password);

//post信息
OutputStream os = huc.getOutputStream();
os.write(sb.toString().getBytes("GBK"));
os.close();

BufferedReader br = new BufferedReader(new InputStreamReader(huc.getInputStream()))

huc.connect();

String line = br.readLine();

while(line != null){

l

System.out.printli(line);

line = br.readLine();

}

结束语:
上面的代码基本就可以实现网站的登陆、信息获取的功能。看到登陆奇兵等软件卖的那么火,我们也做一个去吧

.

参考:
1.A recipe for cookie management
http://www.javaworld.com/javaworld/jw-04-2002/jw-0426-cookie.html
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: