How to save files locally in java
知识补充:
File
类以抽象的方式代表文件名和目录路径名,该类主要用于文件和目录的创建、文件的查找和文件的删除等。
FileOutputStream
类用来创建一个文件并向文件中写数据,如果该流在打开文件进行输出前,目标文件不存在,那么该流会创建该文件。
保存方法:
首先根据要保存的文件路径创建一个文件对象,然后通过“exists”方法判断文件是否存在,若不存在则新建文件,若存在则开始通过“FileOutPutStream”类创建新文件并向该文件中写入数据即可。
示例如下:
private void savePic(InputStream inputStream, String fileName) { OutputStream os = null; try { String path = "D:\\testFile\\"; // 2、保存到临时文件 // 1K的数据缓冲 byte[] bs = new byte[1024]; // 读取到的数据长度 int len; // 输出的文件流保存到本地文件 File tempFile = new File(path); if (!tempFile.exists()) { tempFile.mkdirs(); } os = new FileOutputStream(tempFile.getPath() + File.separator + fileName); // 开始读取 while ((len = inputStream.read(bs)) != -1) { os.write(bs, 0, len); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { // 完毕,关闭所有链接 try { os.close(); inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } }
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