文件编码转换

目录文件编码转换

java 代码

package com.xw.file;

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 FileEncodeConverter {

    // 原文件目录
    private static String srcDir = "x:/src";
    // 转换后的存放目录
    private static String desDir = "x:/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
    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)
    {
        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;
    }

}