打开多行读取

with open('file.txt', 'r') as file:
    lines = file.readlines()
    for line in lines:
        print(line)

try (BufferedReader reader = new BufferedReader(new FileReader("file.txt"))) {
    String line;
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
    }
} catch (IOException e) {
    e.printStackTrace();
}

var xhr = new XMLHttpRequest();
xhr.open('GET', 'file.txt', true);
xhr.onreadystatechange = function() {
    if (xhr.readyState === 4 && xhr.status === 200) {
        var lines = xhr.responseText.split('\n');
        for (var i = 0; i < lines.length; i++) {
            console.log(lines[i]);
        }
    }
};
xhr.send();