只拷贝xml文件至对应目录

/**
     * 复制整个文件夹内容
     * @param oldPath String 原文件路径 如：c:/fqf
     * @param newPath String 复制后路径 如：f:/fqf/ff
     * @return boolean
     */
   public void copyFolder(String oldPath, String newPath) {

       try {
           (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹
           File a=new File(oldPath);
           String[] file=a.list();
           File temp=null;
           for (int i = 0; i < file.length; i++) {
               if(oldPath.endsWith(File.separator)){
                   temp=new File(oldPath+file[i]);
               }
               else{
                   temp=new File(oldPath+File.separator+file[i]);
               }
               
               if(temp.isFile()){
               String tempName = temp.getName();
if (tempName.length() > 3) {
String tempHouzui = tempName.substring(tempName.length() - 3, tempName.length());
if (tempHouzui.equals("xml")) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(
newPath + "/" + (temp.getName()).toString());
byte[] b = new byte[1024 * 5];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
}
               }
               if(temp.isDirectory()){// 如果是子文件夹
                   copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
               }
           }
       }
       catch (Exception e) {
           System.out.println("复制整个文件夹内容操作出错");
           e.printStackTrace();

       }

   }