1 public class ChangeFileEncoding { 2     public static int fileCount = 0; 3     public static String sourceFileRoot = "替换为要转换的源文件或源目录"; // 将要转换文件所在的根目录 4     public static String sourceCharset = "GB2312"; // 源文件编码 5     public static String targetCharset = "utf8"; // 目标文件编码 6     public static void main(String[] args) throws IOException { 7         File fileDir = new File(sourceFileRoot); 8         convert(fileDir); 9         System.out.println("Total Dealed : " + fileCount + "Files");10     }11 12     public static void convert(File file) throws IOException {13         // 如果是文件则进行编码转换，写入覆盖原文件14         if (file.isFile()) {15             // 只处理.java结尾的代码文件16             if (file.getPath().indexOf(".java") == -1) {17                 return;18             }19             InputStreamReader isr = new InputStreamReader(new FileInputStream(20                     file), sourceCharset);21             BufferedReader br = new BufferedReader(isr);22             StringBuffer sb = new StringBuffer();23             String line = null;24             while ((line = br.readLine()) != null) {25                 // 注意写入换行符26                 line =  URLEncoder.encode(line, "utf8");27                 sb.append(line + "\r\n");//windows 平台下 换行符为 \r\n28             }29             br.close();30             isr.close();31 32             File targetFile = new File(file.getPath());33             OutputStreamWriter osw = new OutputStreamWriter(34                     new FileOutputStream(targetFile), targetCharset);35             BufferedWriter bw = new BufferedWriter(osw);36             // 以字符串的形式一次性写入37             bw.write(URLDecoder.decode(sb.toString(), "utf8"));38             bw.close();39             osw.close();40 41             System.out.println("Deal:" + file.getPath());42             fileCount++;43         } else {44             //利用递归对目录下的每个以.java结尾的文件进行编码转换45             for (File subFile : file.listFiles()) {46                 convert(subFile);47             }48         }49     }50 51 }