HttpServletRequest在spring中获取及使用

一般在controller 中直接获取：HttpServletRequest

HttpServletRequest 是线程安全的，所以在service层可以直接通过注入使用

@Autowired
private HttpServletRequest servletRequest;

业务逻辑中，也可通过RequestContextHolder 获取

ServletRequestAttributes requestAttributes1 = (ServletRequestAttributes) 

HttpServletRequest servletRequest = requestAttributes1.getRequest(); 

HttpServletResponse response = requestAttributes1.getResponse();

父线程传递请求信息到子线程用法

若在子线程中需要传递主线程的请求头信息，可以在主线程获取RequestAttributes

RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

在子线程设置：

RequestContextHolder.setRequestAttributes(requestAttributes);