[Java] 正则表达式 02 EmailSpider 抓邮件, CodeCounter 统计程序有效代码行数

EmailSpider.java

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("D:\share\EmailHtm\email.htm"));
            String line = "";
            while((line=br.readLine()) != null) {
                parse(line);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            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());
        }
    }

}

CodeCounter.java

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;
    static long commentLines = 0;
    static long whiteLines = 0;
    
    public static void main(String[] args) {
        File f = new File("D:\share\JavaProjects\CodeCounter\src");
        File[] codeFiles = f.listFiles();
        for(File child : codeFiles){
            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;
        boolean comment = false;
        try {
            br = new BufferedReader(new FileReader(f));
            String line = "";
            while((line = br.readLine()) != null) { // readLine() 已经吃掉了后面的换行符号
                line = line.trim();
                if(line.matches("^[\s&&[^\n]]*$")) {
                    whiteLines ++;
                } else if (line.startsWith("/*") && !line.endsWith("*/")) {
                    commentLines ++;
                    comment = true; 
                } else if (line.startsWith("/*") && line.endsWith("*/")) {
                    commentLines ++;
                } else if (true == comment) {
                    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();
                }
            }
        }
    }

}