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 {

    }
}