import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.Reader; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * * @author Administrator * */ public class JavaCode { private static final String PROJECT_DIR = "C:\\test"; private static int totle = 0; //總行數 private static int source = 0; //代碼行數 private static int blank = 0; //空白行數 private static int comments = 0; //註釋行數 /** * 讀取文件夾內java文件 * @param dir */ private static void listNext(File dir) { File[] files = dir.listFiles(); for (int i = 0; i < files.length; i++) { //判斷是不是文件夾,若是是文件夾繼續向下檢索 if (files[i].isDirectory()) { listNext(files[i]); } else { try { if (files[i].getName().endsWith(".java")) { System.out.println(files[i].getAbsolutePath()); javaLine(files[i]); } }catch (Exception e) { e.printStackTrace(); } } } } /** * 讀取java文件總行數,代碼行數,空白行數,註釋行數 * @param f * @throws IOException * @throws FileNotFoundException */ private static void javaLine(File f) throws FileNotFoundException, IOException{ String strLine = ""; String str = fromFile(f); if (str.length() > 0) { while (str.indexOf('\n') != -1) { totle++; //System.out.println(totle); strLine = str.substring(0, str.indexOf('\n')).trim(); //str = str.substring(str.indexOf('\n') + 1, str.length()); if (strLine.length() == 0 ) { blank++; }else if (strLine.charAt(0) == '*' || strLine.charAt(0) == '/') { comments++; }else{ source++; String regEx = "^*//"; if(regEx(strLine,regEx)){ comments++; } } str = str.substring(str.indexOf('\n') + 1, str.length()); } } } /** * 將java文件以字符數組形式讀取 * @param f * @return * @throws FileNotFoundException * @throws IOException */ private static String fromFile(File f) throws FileNotFoundException,IOException { FileInputStream fis = new FileInputStream(f); byte[] b = new byte[(int) f.length()]; fis.read(b); fis.close(); return new String(b); } /** * 正則匹配 * @param str 輸入字符串 * @param regEx 正則匹配字符串 * @return */ private static boolean regEx(String str,String regEx){ Pattern p=Pattern.compile(regEx); Matcher m=p.matcher(str); boolean result=m.find(); return result; } public static void main(String[] args) throws FileNotFoundException, IOException { //File root = new File(PROJECT_DIR); File directory = new File("");//參數爲空 //獲取項目路徑 String projectFile = directory.getCanonicalPath() ; System.out.println(projectFile+"==============="); listNext(new File(projectFile)); System.out.println(totle+1); System.out.println(source); System.out.println(blank); System.out.println(comments); } }
好東西,記錄一下,轉帖
java