关于‘try-with-resources‘的问题

• 开发中在使用读写流的时候会遇到一个问题

      try {
          //通过输入流读取文件内容
          //FileInputStream警告try-with-resources
          FileInputStream inputStream = new FileInputStream(new File(basePath + name));

          byte []bytes = new byte[1024];
          int len = 0;

          //通过输出流将文件写回浏览器, 在浏览器展示图片
          ServletOutputStream outputStream = response.getOutputStream();

          while ((len = inputStream.read(bytes)) != -1) {
              outputStream.write(bytes, 0, len);
          }
      } catch (IOException e) {
          throw new RuntimeException(e);
      }

• 这是忘记关闭流而导致的警告，关闭受警告的流即可停止警告
• inputStream.close(); outputStream.close();

    try {
         //通过输入流读取文件内容
         FileInputStream inputStream = new FileInputStream(new File(basePath + name));

         byte []bytes = new byte[1024];
         int len = 0;

         //通过输出流将文件写回浏览器, 在浏览器展示图片
         ServletOutputStream outputStream = response.getOutputStream();

         while ((len = inputStream.read(bytes)) != -1) {
             outputStream.write(bytes, 0, len);
         }

		//添加close方法
         inputStream.close();
         outputStream.close();
     } catch (IOException e) {
         throw new RuntimeException(e);
     }