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為灞橋等地區(qū)用戶提供了全套網(wǎng)頁設(shè)計制作服務(wù),及灞橋網(wǎng)站建設(shè)行業(yè)解決方案。主營業(yè)務(wù)為網(wǎng)站建設(shè)、網(wǎng)站制作、灞橋網(wǎng)站設(shè)計,以傳統(tǒng)方式定制建設(shè)網(wǎng)站,并提供域名空間備案等一條龍服務(wù),秉承以專業(yè)、用心的態(tài)度為用戶提供真誠的服務(wù)。我們深信只要達到每一位用戶的要求,就會得到認(rèn)可,從而選擇與我們長期合作。這樣,我們也可以走得更遠(yuǎn)!最近弄爬蟲,遇到的一個問題就是如何使用post方法模擬登陸爬取網(wǎng)頁。
下面是極簡版的代碼:
import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.HttpURLConnection; import java.net.URL; import java.util.HashMap; public class test { //post請求地址 private static final String POST_URL = ""; //模擬谷歌瀏覽器請求 private static final String USER_AGENT = ""; //用賬號登錄某網(wǎng)站后 請求POST_URL鏈接獲取cookie private static final String COOKIE = ""; //用賬號登錄某網(wǎng)站后 請求POST_URL鏈接獲取數(shù)據(jù)包 private static final String REQUEST_DATA = ""; public static void main(String[] args) throws Exception { HashMap<String, String> map = postCapture(REQUEST_DATA); String responseCode = map.get("responseCode"); String value = map.get("value"); while(!responseCode.equals("200")){ map = postCapture(REQUEST_DATA); responseCode = map.get("responseCode"); value = map.get("value"); } //打印爬取結(jié)果 System.out.println(value); } private static HashMap<String, String> postCapture(String requestData) throws Exception{ HashMap<String, String> map = new HashMap<>(); URL url = new URL(POST_URL); HttpURLConnection httpConn = (HttpURLConnection) url.openConnection(); httpConn.setDoInput(true); // 設(shè)置輸入流采用字節(jié)流 httpConn.setDoOutput(true); // 設(shè)置輸出流采用字節(jié)流 httpConn.setUseCaches(false); //設(shè)置緩存 httpConn.setRequestMethod("POST");//POST請求 httpConn.setRequestProperty("User-Agent", USER_AGENT); httpConn.setRequestProperty("Cookie", COOKIE); PrintWriter out = new PrintWriter(new OutputStreamWriter(httpConn.getOutputStream(), "UTF-8")); out.println(requestData); out.close(); int responseCode = httpConn.getResponseCode(); StringBuffer buffer = new StringBuffer(); if (responseCode == 200) { BufferedReader reader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), "UTF-8")); String line = null; while ((line = reader.readLine()) != null) { buffer.append(line); } reader.close(); httpConn.disconnect(); } map.put("responseCode", new Integer(responseCode).toString()); map.put("value", buffer.toString()); return map; } }
網(wǎng)頁標(biāo)題:使用Post方法模擬登陸爬取網(wǎng)頁的實現(xiàn)方法-創(chuàng)新互聯(lián)
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