StreamingResponseBody (Spring Framework 4.3.30.RELEASE API)

```
public interface StreamingResponseBody
```
A controller method return value type for asynchronous request processing where the application can write directly to the response OutputStream without holding up the Servlet container thread.
Note: when using this option it is highly recommended to configure explicitly the TaskExecutor used in Spring MVC for executing asynchronous requests. Both the MVC Java config and the MVC namespaces provide options to configure asynchronous handling. If not using those, an application can set the taskExecutor property of RequestMappingHandlerAdapter.
从以下版本开始:
4.2
作者:
Rossen Stoyanchev

- 方法概要
  所有方法实例方法抽象方法
  修饰符和类型方法说明
  void writeTo(OutputStream outputStream)
  A callback for writing to the response body.

- 方法详细资料
  - writeTo
```
void writeTo(OutputStream outputStream)
      throws IOException
```
    A callback for writing to the response body.
    参数:
    outputStream - the stream for the response body
    抛出:
    IOException - an exception while writing