【CSDN常见问题解答】目录文件编码转换

来源：互联网发布：淘宝网首页无尘服编辑：程序博客网时间：2024/05/01 17:36
有时候导入一个工程到Eclipse中发现中文乱码了。原因就是工程的编码格式变了。比如从UTF-8变成了GBK等等。此时我们手动去改的话十分麻烦。下面这个类就是用来改变整个目录的编码的，详细请看代码。
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;       }     }
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