JAVA IO面试题文件编码转换-优快云博客

本文介绍了一个使用Java编写的简单程序，该程序可以将一个文本文件从一种字符编码（如GBK）转换为另一种编码（如UTF-8）。通过使用BufferedReader和BufferedWriter，程序能够逐行读取并写入文件，支持包括GBK到UTF-8的多种编码转换。

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import java.io.*;
 
public class ChangeEncoding {

    public static void changeEncoding (String inEncoding, String outEncoding,

            String inFileName, String outFileName)  throws IOException {

        BufferedReader reader = new BufferedReader(

            new InputStreamReader(

            new FileInputStream(inFileName), inEncoding));

        BufferedWriter writer = new BufferedWriter(

            new OutputStreamWriter(

            new FileOutputStream(outFileName), outEncoding));

        String s = null;

        while ((s = reader.readLine()) != null) {

            writer.write(s, 0, s.length());

            writer.newLine();

        }

        writer.flush();

        writer.close();

        reader.close();

    }

    public static void main(String[] args) {

        try {

            changeEncoding("GBK", "UTF-8", "gbk.txt", "utf8.txt");

        } catch (IOException e) {

            System.out.println("转换失败，原因：" + e.getMessage());

        }

    }
}
BufferedWriter输出的UTF-8文件是无BOM格式编码的。