3、取邮件

package regex;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestReg03_email {
    public static void main(String[] args) {
        BufferedReader br = null;
        StringBuilder sb = new StringBuilder();

        try {
            br = new BufferedReader(new FileReader("G:\IoTest\01.htm"));
            String str = null;
            while ((str = br.readLine()) != null) {
                sb.append(str);
            }
            List<String> emails = getEmails(sb.toString());
            for (String e : emails) {
                System.out.println(e);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (br != null)
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
    }

    public static List<String> getEmails(String str) {
        List<String> es = new ArrayList<String>();
        Pattern p = Pattern.compile("[\w\.-]*\w+@[\w\.-]*\w+\.\w{2,5}");
        Matcher m = p.matcher(str);
        while (m.find()) {
            es.add(m.group());
        }
        return es;
    }
}