java爬取百度首页logo

package com.test;

? ?

import java.io.*;

import java.net.*;

import java.util.regex.*;

? ?

public class baidulogo {

????static String getUrlContentString(String urlString) throws Exception {

????????String result = "";

????????URL url = new URL(urlString);

????????URLConnection urlConnection = url.openConnection();

????????urlConnection.connect();

????????InputStreamReader inputStreamReader = new InputStreamReader(

????????????????urlConnection.getInputStream(), "utf-8");

????????BufferedReader in = new BufferedReader(inputStreamReader);

????????String line;

????????while ((line = in.readLine()) != null) {

????????????result += line;

????????}

????????return result;

????}

? ?

????static String getLogoUrl(String contentString, String patternString) {

????????String LogoUrl = null;

????????Pattern pattern = Pattern.compile(patternString);

????????Matcher matcher = pattern.matcher(contentString);

????????if (matcher.find()) {

????????????LogoUrl = matcher.group(1);

????????}

????????return LogoUrl;

? ?

????}

? ?

????public static void main(String[] args) throws Exception {

????????// 定义即将访问的链接

????????String urlString = "http://www.baidu.com";

????????String result = getUrlContentString(urlString);

????????String patternString = "src=\"(.+?)\"";

????????String contentString = result;

????????String logoUrl = getLogoUrl(contentString, patternString);

????????System.out.println(logoUrl);

????}

}