import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.Scanner;

/**
 * 把gbk編碼的程序變換為用utf-8的格式編碼
 *
 * 此程序只是為了改變 .java文件的編碼格式如果你想要變換為其他格式只需要改變下面對(duì)應(yīng)的編碼按格式
 *
 * @author 明金同學(xué)	CSDN:https://ymjin.blog.csdn.net/
 */
public class Files {

    /**
     *
     * @param args
     * @throws UnsupportedEncodingException
     * @throws IOException
     */
    public static void main(String[] args) throws UnsupportedEncodingException, IOException {
        Scanner scan = new Scanner(System.in);
        System.out.println("請(qǐng)輸入需要改變編碼格式的文件位置");
        String str = scan.nextLine();
        File file = new File(str);
        System.out.println("文件的初始編碼");
        String bm1 = scan.nextLine();
        System.out.println("文件需要轉(zhuǎn)換成的編碼");
        String bm2 = scan.nextLine();
        getAllFiles(file, bm1, bm2);
    }

    /**
     *
     * @param file 要編譯的文件
     * @param bm1 文件的初始編碼
     * @param bm2 文件需要轉(zhuǎn)換成的編碼
     * @throws FileNotFoundException 文件找不到
     * @throws UnsupportedEncodingException 編碼出錯(cuò)
     * @throws IOException io異常
     */
    public static void getAllFiles(File file, String bm1, String bm2) throws FileNotFoundException, UnsupportedEncodingException, IOException {
        if (file.isDirectory()) {
            File[] test = file.listFiles();
            for (File test1 : test) {
                //類的名字
                String str = test1.getPath();
                if (str.endsWith("java") & test1.isFile()) {
                    String[] s = str.split("\\.");
                    String filecope = s[0] + "cope." + s[1];
                    System.out.println(filecope);
                    File fil = new File(filecope);
                    //轉(zhuǎn)格式
                    InputStreamReader isr = new InputStreamReader(new FileInputStream(test1), bm1);
                    OutputStreamWriter osr = new OutputStreamWriter(new FileOutputStream(fil), bm2);
                    int re = -1;
                    while ((re = isr.read()) != -1) {
                        osr.write(re);
                    }
                    isr.close();
                    osr.close();
                    InputStreamReader isrr = new InputStreamReader(new FileInputStream(fil), bm2);
                    OutputStreamWriter osrw = new OutputStreamWriter(new FileOutputStream(test1), bm2);
                    int r = -1;
                    while ((r = isrr.read()) != -1) {
                        osrw.write(r);
                    }
                    isrr.close();
                    osrw.close();
                    boolean d = fil.delete();
                    System.out.println(str + "文件轉(zhuǎn)換utf-8成功:" + d);
                }
                getAllFiles(test1, bm1, bm2);
            }
        }
    }

}