java批量將utf-8轉化爲gbk

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;

public class UTFToGBK {

	/**
	 * @param args
	 */

	private static void transferFile(String srcFileName, String destFileName)
			throws IOException {

		File OldFile = new File(srcFileName);
		if (!OldFile.exists()) {
			System.out.print("要轉化的文件路徑不存在！");
			return;
		}

		File NewFile = new File(destFileName);

		// NewFile.mkdir();

		// 如果是文件，則轉換
		if (OldFile.isFile()) {
			String line_separator = System.getProperty("line.separator");
			FileInputStream fis = new FileInputStream(srcFileName);
			StringBuffer content = new StringBuffer();
			DataInputStream in = new DataInputStream(fis);
			BufferedReader d = new BufferedReader(new InputStreamReader(in,
					"utf-8"));
			String line = null;
			while ((line = d.readLine()) != null)
				content.append(line + line_separator);
			d.close();
			in.close();
			fis.close();
			// 轉化之後寫入新文件
			Writer ow = new OutputStreamWriter(new FileOutputStream(
					destFileName), "GBK");
			ow.write(content.toString());
			ow.close();
		} else {
			
			if (!NewFile.exists()) {
				NewFile.mkdir();
			}

			// 查找目錄下面的所有文件與文件夾
			File[] childFiles = OldFile.listFiles();
			for (int i = 0, n = childFiles.length; i < n; i++) {
				File child = childFiles[i];
				String childFrom = srcFileName + "/" + child.getName();
				String childTo = destFileName + "/" + child.getName();
				transferFile(childFrom, childTo);
			}
		}

	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			transferFile("C:\\Users\\Dove\\Desktop\\java\\tpartnerregbaseinfo",
					"C:\\Users\\Dove\\Desktop\\tpartnerregbaseinfo");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}