Java实现统计项目代码行！

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class SumJavaCode {

static long normalLines = 0; // 代码行
static long commentLines = 0; // 注释行
static long whiteLines = 0; // 空行

public static void main(String[] args) {
SumJavaCode sjc = new SumJavaCode();
File f = new File("E://MyEclipse 9//iwfncms//");
System.out.println(f.getName());
sjc.treeFile(f);

System.out.println("空行：" + whiteLines);
System.out.println("注释行：" + commentLines);
System.out.println("代码行：" + normalLines);
}

private void treeFile(File f) {

File[] childs = f.listFiles();

for (int i = 0; i < childs.length; i++) {
if (!childs[i].isDirectory()) {
if (childs[i].getName().matches(".*.java$")) {
System.out.println(childs[i].getName());
// count ++;
sumCode(childs[i]);
}
} else {
treeFile(childs[i]);
// sum += count;
}
}
}

/**
* 计算一个.java文件中的代码行，空行，注释行 . * 57. * @param file 58. * 要计算的.java文件 59.
*/
private void sumCode(File file) {
BufferedReader br = null;
boolean comment = false;
try {
br = new BufferedReader(new FileReader(file));
String line = "";
try {
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 (true == comment) {
commentLines++;
if (line.endsWith("*/")) {
comment = false;
}
} else if (line.startsWith("//")) {
commentLines++;
} else {
normalLines++;
}
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
br = null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

}