Java将整个文件夹里的文本中的字符串替换成另外一个字符串（可用于项目复制，变成另一个项目）

 import org.junit.Test;

 import java.io.*;

 /**
  * User: HYY
  * Date: 13-8-18
  * Time: 下午8:11
  * To change this template use File | Settings | File Templates.
  */
 public class ReplaceStr {
     private File fileRootDir = new File("D:\\ahgw\\src\\com\\ahgw");//根目录文件
     private String saveDirPath = "D:\\ahgw\\src\\com\\ahgw2";//替换之后的新的一个目录名称
     private String srcStr = "baoxiu";//要替换的原字符串
     private String destStr = "ahgw";//目的字符串

     @Test
     public void test() throws IOException {

         if (!fileRootDir.exists()) {
             throw new ExceptionInInitializerError("根目录不存在");
         }

         File saveRootDir = new File(saveDirPath);
         if (!saveRootDir.exists()) {
             saveRootDir.mkdirs();
         }

         File[] files = fileRootDir.listFiles();
         operate(files);
     }

     public void operate(File[] files) throws IOException {
         for (File file : files) {
             if (file.isDirectory()) {
                 if (file.listFiles().length == 0) {
                     file.mkdir();
                     System.out.println(file.listFiles().length);
                 } else {
                     operate(file.listFiles());
                 }
             } else {
                 System.out.println("srcPath=" + file.getPath());
                 System.out.println("fileRootDir.getPath()=" + fileRootDir.getPath());

                 String savePath = saveDirPath + file.getPath().substring(fileRootDir.getPath().length());
 //                String savePath = fileRootDir.getParent() + File.separator + saveDirName + File.separator + file.getName();
                 File saveFile = new File(savePath);
                 System.out.println("savePath=" + savePath);
                 replace(file, saveFile);
             }
         }
     }

     /**
      * 根据源文件，修改相应的字符串，并保存起来
      *
      * @param file     源文件
      * @param saveFile 保存的目标文件
      */
     public void replace(File file, File saveFile) throws IOException {
         BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
         if (!saveFile.getParentFile().exists()) {
             saveFile.getParentFile().mkdirs();
         }
         PrintWriter pw = new PrintWriter(saveFile);
         String line;
         while ((line = br.readLine()) != null) {
             line = line.replaceAll(srcStr, destStr);
             pw.println(line);
         }
         br.close();
         pw.close();
     }

     public static void main(String[] args) throws IOException {

     }
 }