Java實現GB2312文件轉UTF8文件

有些書帶的光盤的源代碼是GB2312編碼.通常IDE的編碼是UTF8.這樣直接導入IDE會亂碼. 這時候就需要把GB2312的文件轉成UTF8的文件.轉化的思路很簡單,讀入流初始化的時候告訴jvm是GB2312編碼,讀入后jvm內部會轉成UNICODE,寫出的時候再告訴jvm以UTF8的形式寫出即可.源代碼如下:

import java.io.*;

public class Convert {
    private void process() {
        String srcFile = "D:\\test1\\MatrixState.java";//gb2312編碼
        String destFile = "D:\\test2\\MatrixState.java";//UTF8編碼
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader br = null;

        OutputStream os = null;
        OutputStreamWriter osw = null;
        BufferedWriter bw = null;
        try {
            is = new FileInputStream(srcFile);
            isr = new InputStreamReader(is, "gb2312");
            br = new BufferedReader(isr);
            os = new FileOutputStream(destFile);
            osw = new OutputStreamWriter(os, "UTF-8");
            bw = new BufferedWriter(osw);
            String line;
            for (line = br.readLine(); line != null; line = br.readLine()) {
                System.out.println("line=" + line);
                bw.write(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (isr != null) {
                try {
                    isr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (bw != null) {
                try {
                    bw.flush();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    bw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (osw != null) {
                try {
                    osw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) {
        new Convert().process();
    }
}

參考資料:
http://stackoverflow.com/questions/33535594/converting-utf8-to-gb2312-in-java