private static void copy(String source, String target) { // 检查source是否存在 Path sourcePath =Paths.get(source).normalize().toAbsolutePath(); if (!sourcePath.toFile().isFile()){ throw new IllegalArgumentException(source);
    } // 检查target是否存在，不存在创建 Path targetPath =Paths.get(target).normalize().toAbsolutePath();
    Path targetParentPath =targetPath.getParent(); if (!targetParentPath.toFile().exists()){
       targetParentPath.toFile().mkdirs();
    } // 复制 try (InputStream input= new FileInputStream(sourcePath.toString());
         OutputStream output = new FileOutputStream(targetPath.toString());){ byte[] buffer = new byte[1024]; int len; while ((len =input.read(buffer)) != -1) {
            output.write(buffer, 0, len);
        }
        output.flush();
    } catch (IOException e) {
        e.printStackTrace();
    }
}