java下载页面代码 java下载文件夹代码

如何用Java实现模拟登录Discuz!论坛并下载返回的html代码？

package org.shaw;

import org.apache.commons.httpclient.Cookie;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.NameValuePair;

import org.apache.commons.httpclient.methods.GetMethod;

import org.apache.commons.httpclient.methods.PostMethod;

public class BaiyouBBS {

static final String LOGON_SITE = "";

static final int LOGON_PORT = 80;

public Cookie[] login(String name, String pas) {

try {

HttpClient client = new HttpClient();

client.getHostConfiguration().setHost(LOGON_SITE, LOGON_PORT);

PostMethod post = new PostMethod("/logging.php?action=login");

client.executeMethod(post);

String responseString = new String(post.getResponseBody(), "gbk");

post.releaseConnection();

String formhash = getFormHash(responseString);

System.out.println(formhash);

post = new PostMethod("/logging.php?action=login");

NameValuePair[] params = new NameValuePair[11];

params[0] = new NameValuePair("loginfield", "username");

params[1] = new NameValuePair("username", name);

params[2] = new NameValuePair("password", pas);

params[3] = new NameValuePair("referer", "index.php");

params[4] = new NameValuePair("questionid", "0");

params[5] = new NameValuePair("answer", "");

params[6] = new NameValuePair("cookietime", "2592000");

params[7] = new NameValuePair("formhash", formhash);

params[8] = new NameValuePair("loginmode", "");

params[9] = new NameValuePair("loginsubmit", "true");

params[10] = new NameValuePair("styleid", "");

post.setRequestBody(params);

client.executeMethod(post);

// responseString = new String(post.getResponseBody(), "gbk");

post.releaseConnection();

GetMethod get = new GetMethod("/index.php");

client.executeMethod(get);

responseString = new String(get.getResponseBody(), "gbk");

get.releaseConnection();

System.out.println(responseString);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public String getFormHash(String htmlContent) {

try {

int start = htmlContent.indexOf("name=\"formhash\"");

start = htmlContent.indexOf("value=\"", start) + 7;

int end = htmlContent.indexOf("\"", start);

String formhash = htmlContent.substring(start, end);

return formhash;

} catch (RuntimeException e) {

throw e;

}

}

public static void main(String[] args) {

new BaiyouBBS().login("zzzxxxzzz", "zzzxxxzzz");

}

}

相关问答

Q1: java代码实现网页下载

看你的意思，我觉得你可以去网上查查java网络爬虫的实现，就是自动抓取网页内容，并保存

这里有个链接你可以参考下

Q2: 使用java编写一个多线程下载器，需要在URL栏中输入网址，然后通过网址下载。该怎么实现，求源代码

swing做前台界面。后台使用java.net中java下载页面代码的HTTPConnection下载就OK。下载可以用getInputStream（）获取数据java下载页面代码，然后写入文件。只提供思路java下载页面代码，无代码。不搞java好多年……

Q3: java怎么实现下载指定网页中包含的pdf文件。 求代码？

解析指定页面java下载页面代码，得到pdf文件java下载页面代码的地址java下载页面代码，用URL来取回pdfjava下载页面代码的输入流java下载页面代码，然后写到本地文件。

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