转换指定目录及其子目录下所有文件的编码从GBK到UTF-8

UnicodeCover.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

/**
 * 
 */

/**
 * @author <p>Innate Solitary 于2012-5-3 9:16:45</p>
 *
 */
public class UnicodeCover {
	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		long start = System.currentTimeMillis();
		unCoverUnicodeForDir("F:\\work\\jwzt\\source\\soms4", "F:\\work\\jwzt\\test", "F:\\work\\jwzt\\source\\soms4\\", "GBK");
		long end = System.currentTimeMillis();
		System.out.println(end - start);
	}
	
	public static void unCoverUnicodeForDir(String dirPath, String outpath, String prefixPath, String sourceCharset) throws Exception {
		File dir = new File(dirPath);
		if(!dir.isDirectory()) {
			String content = unCoverUnicode(dirPath, sourceCharset);
			File file = new File(outpath + "/" + dirPath.replace(prefixPath, "").replace(dirPath.split("\\\\")[dirPath.split("\\\\").length - 1], ""));
			if(!file.exists()) {
				file.mkdirs();
			}
			FileOutputStream fos= new FileOutputStream(outpath + "/" + dirPath.replace("F:\\work\\jwzt\\source\\soms4\\", ""));
			BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos));
			bw.write(content);
			bw.close();
			fos.close();
			return;
		}
		
		File[] files = dir.listFiles();
		for (File file : files) {
			System.out.println(file.getAbsolutePath());
	                unCoverUnicodeForDir(file.getAbsolutePath(), outpath, prefixPath, sourceCharset);
                }
		
	}
	
	public static String unCoverUnicode(String filePath, String sourceCharset) throws Exception {
		String cmd = "native2ascii -reverse " + filePath;
		BufferedReader br = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec(cmd).getInputStream(), sourceCharset));
		
		StringBuffer sb = new StringBuffer();
		
		for(String line = br.readLine(); line != null; line = br.readLine()) {
			sb.append(line).append("\r\n");
		}
		br.close();
		return sb.toString();
	}

}