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

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());
}
}

}

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();
}
}
}
}

}