package iotest;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class StaticsCodeingLine {
private static int whiteLines = 0;
private static int commentLines = 0;
private static int normalLines = 0;
private static int overallLines=0;
/**
* @param args
*/
public static void main(String[] args) {
File f = new File("E:\\test\\src\\iotest\\StaticsCodeingLine.java");
sumCode(f);
}
private static 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++;
}
overallLines=whiteLines+normalLines+commentLines;
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
System.out.println("空行数:"+whiteLines);
System.out.println("注释行数:"+commentLines);
System.out.println("代码行数:"+normalLines);
System.out.println("总行数:"+overallLines);
br.close();
br = null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
从命令行输入一个参数(指定目录或文件),输出该目录下指定类型文件(.cs, .java)的个数、每个文件的总行数、空行数、注释行数、代码行数。目标二代码
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import java.util.regex.Pattern;
/**
* 代码统计工具
* 统计某个java源文件或某个目录中所有java源文件中注释、空白行、代码行各占多少行
* 注释:包括单行注释(//)、多行注释、文档注释
* 空白行:一行内没有任何内容的表示空白行
* 代码行:以分号“;”结束的一条语句,可以统计为一行有效代码
*/
public class CodeStatDemo {
// 记录注释行数
static long annotationLine = 0;
// 记录空白行数
static long blankLine = 0;
// 记录有效代码的行数
static long codeLine = 0;
// 代码总行数
static long totalLine = 0;
// 文件总数
static long fileCount = 0;
public static void main(String[] args) throws FileNotFoundException {
System.out.println("请输入要统计代码量的java文件或java目录:");
Scanner in = new Scanner(System.in);
String filePath = in.nextLine();
File file = new File(filePath);
// 根据用户输入的文件名和目录执行代码量统计
codeStat(file);
System.out.println("----------统计结果---------");
System.out.println("文件数量:" + fileCount + "个");
System.out.println(file + "文件/目录总行数:" + totalLine);
System.out.println("代码行数:" + codeLine);
System.out.println("注释行数:" + annotationLine);
System.out.println("空白行数:" + blankLine);
long otherLine = totalLine - (codeLine + annotationLine + blankLine);
System.out.println("其它行数:" + otherLine);
}
private static void codeStat(File file) throws FileNotFoundException {
if (file == null || !file.exists())
throw new FileNotFoundException(file + ",文件不存在!");
fileCount ++; // 文件数累加
if (file.isDirectory()) {
File[] files = file.listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) {
return pathname.getName().endsWith(".java") || pathname.isDirectory();
}
});
for (File target : files) {
codeStat(target);
}
} else {
BufferedReader bufr = null;
try {
// 将指定路径的文件与字符流绑定
bufr = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
} catch (FileNotFoundException e) {
throw new FileNotFoundException(file + ",文件不存在!" + e);
}
// 定义匹配每一行的正则匹配器
Pattern annotationLinePattern = Pattern.compile("((//)|(/\\*+)|((^\\s)*\\*)|((^\\s)*\\*+/))+",
Pattern.MULTILINE + Pattern.DOTALL); // 注释匹配器(匹配单行、多行、文档注释)
Pattern blankLinePattern = Pattern.compile("^\\s*$"); // 空白行匹配器(匹配回车、tab键、空格)
Pattern codeLinePattern = Pattern.compile("(?!import|package).+;\\s*(((//)|(/\\*+)).*)*",
Pattern.MULTILINE + Pattern.DOTALL); // 代码行匹配器(以分号结束为一行有效语句,但不包括import和package语句)
// 遍历文件中的每一行,并根据正则匹配的结果记录每一行匹配的结果
String line = null;
try {
while((line = bufr.readLine()) != null) {
if (annotationLinePattern.matcher(line).find()) {
annotationLine ++;
}
if (blankLinePattern.matcher(line).find()) {
blankLine ++;
}
if (codeLinePattern.matcher(line).matches()) {
codeLine ++;
}
totalLine ++;
}
} catch (IOException e) {
throw new RuntimeException("读取文件失败!" + e);
} finally {
try {
bufr.close(); // 关闭文件输入流并释放系统资源
} catch (IOException e) {
throw new RuntimeException("关闭文件输入流失败!");
}
}
}
}
}