Java逐行读取某个目录下所有文件的内容

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描述

先获取目录basePath下面的文件名组数，再通过目录+文件名的方式读取每一个文件，最后通过BufferedReader的readLine功能读取文件内容

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使用方法

直接上代码

import org.junit.Test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

public class ReadFileTest {

    @Test
    public void test() throws Exception {
        
        String basePath = "C:/Users/Administrator/Desktop/filedir";
        String[] list = new File(basePath).list();

        if (list == null) {
            System.out.println("file not found");
            return;
        }

        for (String filename : list) {
            System.out.println("filename: " + filename);
            BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(basePath + "/" + filename), StandardCharsets.UTF_8));
            String str;
            while ((str = in.readLine()) != null) {
                System.out.println(str);
            }
            in.close();
        }
    }
}