将文件读入内存？

with open('file.txt', 'r') as f:
    content = f.read()

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;

public class ReadFile {
    public static void main(String[] args) {
        try {
            String content = new String(Files.readAllBytes(Paths.get("file.txt")), StandardCharsets.UTF_8);
            System.out.println(content);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

const fs = require('fs');

fs.readFile('file.txt', 'utf8', (err, content) => {
    if (err) {
        console.error(err);
        return;
    }
    console.log(content);
});