用java我想获取登录后的html文档,一直报错403

import java.io.*;
import java.net.*;
public class FormPoster
{
String str="account=******&password=******";

static String a="";
public InputStream post(URL url) throws IOException
{
HttpURLConnection uc=(HttpURLConnection) url.openConnection();

uc.setDoOutput(true);
uc.setDoInput(true);
uc.setRequestProperty("User-Agent","Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko");
uc.setRequestProperty("请求","POST / HTTP/1.1");
uc.setRequestProperty("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
uc.setRequestProperty("Accept","text/html, application/xhtml+xml");
 uc.setRequestProperty("Accept-Language","zh-CN");  
 uc.setRequestProperty("Accept-Encoding","gzip, deflate");  
 uc.setRequestProperty("Connection","Keep-Alive");
uc.setRequestProperty("Set-Cookie", "q_c1=1dcad38e4a244cb8b611d277de4335a5|1469272988000|1469272988000; l_cap_id=ZmNhNmNjODUzMjMxNDI1Njk1MzdmMmU3OThiOTVlOGU=|1470296178|87e09bd94f9aec0ae514d1a68ee2b0cd76145de6; cap_id=M2JjNzJmYzBmMzJkNDI2NTk1NWU3YzQ4ZDYyMDhjY2E=|1470296178|92d64fc0d0c0fd09454fcf7f07b0b27ca451863f; d_c0=AGDAi1LzRQqPTkeb2yGxHD3Twy27Rm9pXJg=|1469272988; _zap=4bbe642e-7b77-4a68-9a6b-83ad90501a03; __utma=51854390.1443812525.1470275701.1470275701.1470296204.2; __utmz=51854390.1470296204.2.2.utmcsr=zhihu.com|utmccn=(referral)|utmcmd=referral|utmcct=/; login=NDZiY2NiYWNmYTAzNDM3Mzk4NmUwM2NjNWEzOWUyZmU=|1470296186|c1a52509e3e165fb562a273e777c6dffcc514058; __utmb=51854390.8.10.1470296204; __utmt=1; __utmv=51854390.000--|2=registration_date=20160722=1^3=entry_date=20160723=1; n_c=1; __utmc=51854390; a_t=2.0AHAAxB5ARAoXAAAA233KVwBwAMQeQEQKAGDAi1LzRQoXAAAAYQJVTdt9ylcAj4mrzqw5nM97J_Px2AdXkry9tQflr_vYx3dBbD2WypTZRrVqGA8cnA==; z_c0=Mi4wQUhBQXhCNUFSQW9BWU1DTFV2TkZDaGNBQUFCaEFsVk4yMzNLVndDUGlhdk9yRG1jejNzbjhfSFlCMWVTdkwyMUJ3|1470296283|0fd18b8560e36d23aedf8cab27785a74b1b753b2");
 uc.setUseCaches(false);  
uc.setRequestMethod("POST");


OutputStreamWriter out=new OutputStreamWriter(uc.getOutputStream(),"UTF-8");
out.write(str);
out.write("\r\n");
out.flush();
return uc.getInputStream();

}
public static void main(String args[]) throws IOException

{
URL url=new URL("https://www.zhihu.com/#signin");
FormPoster poster=new FormPoster();
InputStream in=poster.post(url);
InputStreamReader theHTML=new InputStreamReader(in,"UTF-8");
int c;
while((c=theHTML.read())!=-1)
{
System.out.print((char)c);
}

}
}
下面是报错的信息Exception in thread "main" java.io.IOException: Server returned HTTP response code: 403 for URL: https://www.zhihu.com/#signin
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
at FormPoster.post(FormPoster.java:30)
at FormPoster.main(FormPoster.java:38)
我试了过吧post改get,没用

3个回答

不是你客户端的错误,而是服务器端的错误。

qq_35636083
RC_ 那我应该怎么修改啊,我就是想抓取知乎网登陆后的html文档。
3 年多之前 回复

403是文件的权限问题,检查下。

不能使用这种方法抓取内容,使用httpclient 就可以抓到,百度一下httpclient 的用法吧

qq_35636083
RC_ 那个我不会,那个要去看什么书啊。而且每次我都用httpclient都缺很多的包,我明明下载了很多包了已经还是缺我都不知道去哪里下载了
3 年多之前 回复
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