Java 批量修改文件后缀

import java.io.*;  

 

public class test {  

   

  public void reName(String path, String from, String to) {  

    File f = new File(path);  

    File[] fs = f.listFiles();  

  

    for (int i = 0; i < fs.length; ++i) {  

      File f2 = fs[i];  

     

      if (f2.isDirectory()) {  

        reName(f2.getPath(), from, to);  

      } else {  

        String name = f2.getName();

          if (name.endsWith(from)) {  

          f2.renameTo(new File(f2.getParent() + "/" + name.substring(0, name.indexOf(from)) + to));  

        }  

      }  

    }  

  }  

  public static void main(String[] args) {  

   test rf = new test();  

    rf.reName("C:/Documents and Settings/xxxxx/Desktop/astaxie", ".md",".txt");  

  }  

}