使用 FileReader 逐行读取文件内容

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

public class ReadFile {

    public static void main(String[] args) {
        try (FileReader reader = new FileReader("example.txt"); BufferedReader buffer = new BufferedReader(reader);) {

            String line;
            // 逐行读取文件内容
            while ((line = buffer.readLine()) != null) {
                System.out.println(line);
            }

            System.out.println("文件读取成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}