统计指定目录下的文本行数

CodeLineCount.java

package com;

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

/**
 * @author Administrator
 * @date 2018-11-27 16:42
 **/
public class Count {
    public static void main(String[] args) {
        long java = count(new File("D:\\App"), new FileFilter() {
            @Override
            public boolean accept(File pathname) {
                return !pathname.getAbsolutePath().contains("D:\\App\\.idea")
                        && !pathname.getAbsolutePath().contains("D:\\App\\gen")
                        && (pathname.isDirectory()
                        || pathname.getName().endsWith(".java")
                        || pathname.getName().endsWith(".xml"));
            }
        });
        System.out.println(java);
    }

    public static long count(File dir, FileFilter filter) {
        if (!dir.exists()) return 0;
        if (dir.isDirectory()) {
            File[] files = dir.listFiles(filter);
            if (files.length <= 0) {
                return 0;
            } else {
                int length = 0;
                for (File file : files) {
                    length += count(file, filter);
                }
                return length;
            }
        } else if (dir.isFile()) {
            System.out.println(dir);
            int length = 0;
            try {
                BufferedReader r = new BufferedReader(new FileReader(dir));
                while (null != r.readLine()) {
                    length++;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return length;
        }
        return 0;
    }

}