Java使用正则表达式爬取网站全部连接

package Regex;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 网络爬虫取连接然后逐个取出
 * @param args
 */

public class WebSpiderTest {
	
	/**
	 * 获得urlStr对应的网页的源码内容
	 * @param urlStr
	 * @return
	 */
	public static String getURLContent(String urlStr, String charset) {
		StringBuilder sb = new StringBuilder();
		try {
			URL url = new URL(urlStr);
			//url.openStream()打开一个输入流
			BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream(), Charset.forName(charset)));
			String temp = "";
			while((temp = reader.readLine()) != null) {
				sb.append(temp);
//				System.out.println(temp);//打印输入网站源码
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return sb.toString();
	}

	public static List getMatherSubstrs(String destStr, String regexStr) {
//		Pattern p = Pattern.compile(""); //取到所有超链接的a标签里的所有内容
		Pattern p = Pattern.compile(regexStr);	//取到超链接的地址
		Matcher m = p.matcher(destStr);
		List result = new ArrayList();
		while(m.find()) {
			result.add(m.group(1));
		}
		return result;
	}
	public static void main(String[] args) {
		String destStr = getURLContent("https://www.163.com/", "gbk");
		
		List result = getMatherSubstrs(destStr, "href=\"([\\w\\s./:]+？)\"");
		for(String temp : result) {
			System.out.println(temp);
		}

				
	}

}