关于正则表达式的小程序

本程序是转于尚学堂马老师课上代码

网页上抓取email地址

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("E://yzh//src//1.html"));
   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());
  }
 }

}
代码统计器：

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("E://yzh//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) {
    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();
    }
   }
  }
 }

}