正则表达式_网页爬虫

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTest {

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

        
        List<String> list = getMails();
        
        for(String mail : list){
            System.out.println(mail);
        }
    }
    
    

    public static List<String>  getMails() throws IOException{
        
        //1,读取源文件。
        BufferedReader bufr = new BufferedReader(new FileReader("F:\\IO\\mail.html"));
        
        //2,对读取的数据进行规则的匹配。从中获取符合规则的数据.
        String mail_regex = "\\w+@\\w+(\\.\\w+)+";
        
        List<String> list = new ArrayList<String>();
        
        
        Pattern p = Pattern.compile(mail_regex);
        
        String line = null;
        
        while((line=bufr.readLine())!=null){
            
            Matcher m = p.matcher(line);
            while(m.find()){
                //3,将符合规则的数据存储到集合中。
                list.add(m.group());
            }
            
        }
        return list;
        
    }
}

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTest {

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

        
        List<String> list = getMailsByWeb();
        
        for(String mail : list){
            System.out.println(mail);
        }
    }
    public static List<String> getMailsByWeb() throws IOException {
        
        URL url = new URL("http://192.168.1.100:8080/myweb/mail.html");
        
        BufferedReader bufIn = new BufferedReader(new InputStreamReader(url.openStream()));
                
        //2,对读取的数据进行规则的匹配。从中获取符合规则的数据.
        String mail_regex = "\\w+@\\w+(\\.\\w+)+";
        
        List<String> list = new ArrayList<String>();
        
        
        Pattern p = Pattern.compile(mail_regex);
        
        String line = null;
        
        while((line=bufIn.readLine())!=null){
            
            Matcher m = p.matcher(line);
            while(m.find()){
                //3,将符合规则的数据存储到集合中。
                list.add(m.group());
            }
            
        }
        return list;
    }
}