java.lang.OutOfMemoryError，将文件中的文本转换为UTF8编码

import java.io.*;

public class FileEncodingConverter {
    public static void main(String[] args) {
        String sourceFilePath = "source.txt";
        String targetFilePath = "target.txt";

        try {
            // 读取源文件
            FileInputStream fis = new FileInputStream(sourceFilePath);
            InputStreamReader isr = new InputStreamReader(fis, "GBK");

            // 写入目标文件
            FileOutputStream fos = new FileOutputStream(targetFilePath);
            OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");

            // 逐行读取并转换编码
            BufferedReader br = new BufferedReader(isr);
            BufferedWriter bw = new BufferedWriter(osw);
            String line;
            while ((line = br.readLine()) != null) {
                bw.write(line);
                bw.newLine();
            }

            // 关闭流
            br.close();
            bw.close();
            fis.close();
            fos.close();

            System.out.println("文件编码转换成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}