正则表达式2

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一:抓取网页中的Email地址

利用正则表达式匹配网页中的文本

[\w[.-]]+@[\w[.-]]+\.[\w]+

将网页内容分割提取
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import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class EmailSpider {

public static void main(String[] args) {    try {        BufferedReader br = new BufferedReader(new FileReader("C:\\emailSpider.html"));        String line = "";        while((line=br.readLine()) != null) {            parse(line);        }    } catch (FileNotFoundException e) {        e.printStackTrace();    } catch (IOException e) {        e.printStackTrace();    }}private static void parse(String line) {    Pattern p = Pattern.compile("[\\w[.-]]+@[\\w[.-]]+\\.[\\w]+");    Matcher m = p.matcher(line);    while(m.find()) {        System.out.println(m.group());    }}

}

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打印结果:
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867124664@qq.com
260678675@QQ.com
806208721@qq.com
hr_1985@163.com
32575987@qq.com
qingchen0501@126.com
yingyihanxin@foxmail.com
1170382650@qq.com
1170382650@qq.com
yingyihanxin@foxmail.com
qingchen0501@126.com
32575987@qq.com
hr_1985@163.com

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现在你找到这么多邮箱地址,用上JavaMail的知识,你可以群发垃圾邮件了,呵呵!!!

二:代码统计
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class CodeCounter {

static long normalLines = 0;//正常代码行static long commentLines = 0;//注释行static long whiteLines = 0;//空白行public static void main(String[] args) {    //找到某个文件夹,该文件夹下面在没有文件夹,这里没有写递归处理不在同一文件夹的文件    File f = new File("E:\\Workspaces\\eclipse\\Application\\JavaMailTest\\src\\com\\java\\mail");    File[] codeFiles = f.listFiles();    for(File child : codeFiles){        //只统计java文件        if(child.getName().matches(".*\\.java$")) {            parse(child);        }    }    System.out.println("normalLines:" + normalLines);    System.out.println("commentLines:" + commentLines);    System.out.println("whiteLines:" + whiteLines);}private static void parse(File f) {    BufferedReader br = null;    //表示是否为注释开始    boolean comment = false;    try {        br = new BufferedReader(new FileReader(f));        String line = "";        while((line = br.readLine()) != null) {            //去掉注释符/*前面可能出现的空白            line = line.trim();            //空行 因为readLine()将字符串取出来时,已经去掉了换行符\n            //所以不是"^[\\s&&[^\\n]]*\\n$"            if(line.matches("^[\\s&&[^\\n]]*$")) {                whiteLines ++;            } else if (line.startsWith("/*") && !line.endsWith("*/")) {                //统计多行/*****/                commentLines ++;                comment = true;                } else if (line.startsWith("/*") && line.endsWith("*/")) {                //统计一行/**/                commentLines ++;            } else if (true == comment) {                //统计*/                commentLines ++;                if(line.endsWith("*/")) {                    comment = false;                }            } else if (line.startsWith("//")) {                commentLines ++;            } else {                normalLines ++;            }        }    } catch (FileNotFoundException e) {        e.printStackTrace();    } catch (IOException e) {        e.printStackTrace();    } finally {        if(br != null) {            try {                br.close();                br = null;            } catch (IOException e) {                e.printStackTrace();            }        }    }}

}
文章出处:http://www.cnblogs.com/ITtangtang/archive/2012/05/01/2477563.html

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