使用 FileWriter 逐行写入文本

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class WriteToFile {
    public static void main(String[] args) {
        try (FileWriter writer = new FileWriter("example.txt"); BufferedWriter buffer = new BufferedWriter(writer)) {
            // 写入文件
            buffer.write("第一行文本");
            // 换行
            buffer.newLine();
            
            System.out.println("文件写入成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}