批量文件编码转换

package zhyzh.ncs.base;
import java.io.BufferedReader;    
import java.io.BufferedWriter;    
import java.io.File;    
import java.io.FileFilter;    
import java.io.FileInputStream;    
import java.io.FileOutputStream;    
import java.io.IOException;    
import java.io.InputStream;    
import java.io.InputStreamReader;    
import java.io.OutputStream;    
import java.io.OutputStreamWriter;    
import java.io.Reader;    
import java.io.UnsupportedEncodingException;    
import java.io.Writer;    
   
public class EncodeConverter {    
   
    // 原文件目录    
    private static String srcDir = "D:\\webapps\\zpdht\\src";    
    // 转换后的存放目录    
    private static String desDir = "D:\\des";     
    // 源文件编码    
    private static String srcEncode = "gb2312";    
    // 输出文件编码    
    private static String desEncode = "utf-8";    
        
    // 处理的文件过滤,过滤器   
    private static FileFilter filter = new FileFilter() {    
        public boolean accept(File pathname) {    
            // 只处理：目录 或是 .java文件    
            if (pathname.isDirectory()    
                    || (pathname.isFile() && pathname.getName().endsWith(    
                            ".java")))    
                return true;    
            else   
                return false;    
        }    
    };    
        
    /**   
     * @param file   
     */   
    public static void readDir(File file)    
    {    
//    	以过滤器作为参数
        File[] files = file.listFiles(filter);   
        for (File subFile : files) {    
            // 建立目标目录    
            if (subFile.isDirectory()) {    
                File file3 = new File(desDir + subFile.getAbsolutePath().substring(srcDir.length()));    
                if (!file3.exists()) {    
                    file3.mkdir();    
                }    
                file3 = null;    
                readDir(subFile);    
            } else {    
                System.err.println("一源文件：\t"+subFile.getAbsolutePath() + "\n目标文件：\t" + (desDir + subFile.getAbsolutePath().substring(srcDir.length())));    
                System.err.println("-----------------------------------------------------------------");    
                try {    
                    convert(subFile.getAbsolutePath(), desDir + subFile.getAbsolutePath().substring(srcDir.length()), srcEncode, desEncode);    
                } catch (UnsupportedEncodingException e) {    
                    e.printStackTrace();    
                } catch (IOException e) {    
                    e.printStackTrace();    
                }    
            }    
        }    
    }    
        
    /**   
     *    
     * @param infile    源文件路径   
     * @param outfile   输出文件路径   
     * @param from  源文件编码   
     * @param to    目标文件编码   
     * @throws IOException   
     * @throws UnsupportedEncodingException   
     */   
    public static void convert(String infile, String outfile, String from,    
            String to) throws IOException, UnsupportedEncodingException {    
        // set up byte streams    
        InputStream in;    
        if (infile != null)    
            in = new FileInputStream(infile);    
        else   
            in = System.in;    
        OutputStream out;    
        if (outfile != null)    
            out = new FileOutputStream(outfile);    
        else   
            out = System.out;    
   
        // Use default encoding if no encoding is specified.    
        if (from == null)    
            from = System.getProperty("file.encoding");    
        if (to == null)    
            to = System.getProperty("file.encoding");    
   
        // Set up character stream    
        Reader r = new BufferedReader(new InputStreamReader(in, from));    
        Writer w = new BufferedWriter(new OutputStreamWriter(out, to));    
   
        // Copy characters from input to output. The InputStreamReader    
        // converts from the input encoding to Unicode,, and the    
        // OutputStreamWriter    
        // converts from Unicode to the output encoding. Characters that cannot    
        // be    
        // represented in the output encoding are output as '?'    
        char[] buffer = new char[4096];    
        int len;    
        while ((len = r.read(buffer)) != -1)    
            w.write(buffer, 0, len);    
        r.close();    
        w.flush();    
        w.close();    
    }    
        
   
    public static void main(String[] args) {    
        // 建立目标文件夹    
        File desFile = new File(desDir);    
        if (!desFile.exists()) {    
            desFile.mkdir();    
        }    
        desFile = null;    
   
        File srcFile = new File(srcDir);    
        // 读取目录 循环转换文件    
        readDir(srcFile);    
        srcFile = null;    
    }    
}