Java 合并文本文件

本文介绍了 Java 使用多线程的方式合并多个文本文件。

import java.io.*;
/**
 * 使用多线程的方式合并文本文件
 */
public class MergeFilesThread extends Thread {
    private File file;
    private MergeFilesThread(File file) {
        super();
        this.file = file;
    }
    public void run() {
        InputStream in = null;
        OutputStream out = null;
        try {
            System.out.println(Thread.currentThread().getName() + file.getName());
            in = new FileInputStream(file);
            byte[] b = new byte[in.available()];
            in.read(b);
            out = new FileOutputStream("out.txt", true);
            out.write(b);
            out.write('\n'); // 每个文件一行
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                in.close();
                out.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    public static void main(String[] args) throws Exception {
        File dir = new File("文件夹路径");
        File[] listFiles = dir.listFiles();
        for (File file : listFiles) {
            MergeFilesThread a1 = new MergeFilesThread(file);
            a1.start();
            a1.join();
        }
    }
}