java 批量文件后缀重命名

import java.io.File;

public class BatchFileSuffixRename {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
//        File.separator  　这是用你所用的系统默认的文件分割符
//        String path = "C:"+File.separator+"my.doc" ;
        
        String path = "E:" + File.separator + "cc" + File.separator + "images" + File.separator + "Images";
        //String path = "E:\\cc\\images\\Images";
//        String path = "E:/cc/images/Images";
        String from = "JPG";
        String to = "jpg";
        suffixRename(path, from, to);
    }

    /**
     * 
     * @param path 要批量修改后缀名文件夹路径
     * @param from 源文件后缀名
     * @param to  修改后目标文件后缀名
     */
    public static void suffixRename(String path, String from, String to) {
        File file = new File(path);
        File[] fs = file.listFiles();
        for (int i = 0; i < fs.length; i++) {
            File f2 = fs[i];
            if (f2.isDirectory()) {
                suffixRename(f2.getPath(), from, to);
            } else {
                String name = f2.getName();
                if (name.endsWith(from)) {
                    f2.renameTo(new File(f2.getParent() + File.separator 
                            + name.substring(0, name.indexOf(from)) + to));
                }
            }
        }
    }

}