org.springframework.web.servlet.FlashMapManager#saveOutputFlashMap ( )源码实例Demo

/**
 * Convert model to request parameters and redirect to the given URL.
 * @see #appendQueryProperties
 * @see #sendRedirect
 */
@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
		HttpServletResponse response) throws IOException {

	String targetUrl = createTargetUrl(model, request);
	targetUrl = updateTargetUrl(targetUrl, model, request, response);

	FlashMap flashMap = RequestContextUtils.getOutputFlashMap(request);
	if (!CollectionUtils.isEmpty(flashMap)) {
		UriComponents uriComponents = UriComponentsBuilder.fromUriString(targetUrl).build();
		flashMap.setTargetRequestPath(uriComponents.getPath());
		flashMap.addTargetRequestParams(uriComponents.getQueryParams());
		FlashMapManager flashMapManager = RequestContextUtils.getFlashMapManager(request);
		if (flashMapManager == null) {
			throw new IllegalStateException("FlashMapManager not found despite output FlashMap having been set");
		}
		flashMapManager.saveOutputFlashMap(flashMap, request, response);
	}

	sendRedirect(request, response, targetUrl, this.http10Compatible);
}
 

/**
 * Convert model to request parameters and redirect to the given URL.
 * @see #appendQueryProperties
 * @see #sendRedirect
 */
@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
		HttpServletResponse response) throws IOException {

	String targetUrl = createTargetUrl(model, request);
	targetUrl = updateTargetUrl(targetUrl, model, request, response);

	FlashMap flashMap = RequestContextUtils.getOutputFlashMap(request);
	if (!CollectionUtils.isEmpty(flashMap)) {
		UriComponents uriComponents = UriComponentsBuilder.fromUriString(targetUrl).build();
		flashMap.setTargetRequestPath(uriComponents.getPath());
		flashMap.addTargetRequestParams(uriComponents.getQueryParams());
		FlashMapManager flashMapManager = RequestContextUtils.getFlashMapManager(request);
		if (flashMapManager == null) {
			throw new IllegalStateException("FlashMapManager not found despite output FlashMap having been set");
		}
		flashMapManager.saveOutputFlashMap(flashMap, request, response);
	}

	sendRedirect(request, response, targetUrl, this.http10Compatible);
}
 

/**
 * Convenience method that retrieves the {@link #getOutputFlashMap "output"
 * FlashMap}, updates it with the path and query params of the target URL,
 * and then saves it using the {@link #getFlashMapManager FlashMapManager}.
 * @param location the target URL for the redirect
 * @param request the current request
 * @param response the current response
 * @since 5.0
 */
public static void saveOutputFlashMap(String location, HttpServletRequest request, HttpServletResponse response) {
	FlashMap flashMap = getOutputFlashMap(request);
	if (CollectionUtils.isEmpty(flashMap)) {
		return;
	}

	UriComponents uriComponents = UriComponentsBuilder.fromUriString(location).build();
	flashMap.setTargetRequestPath(uriComponents.getPath());
	flashMap.addTargetRequestParams(uriComponents.getQueryParams());

	FlashMapManager manager = getFlashMapManager(request);
	Assert.state(manager != null, "No FlashMapManager. Is this a DispatcherServlet handled request?");
	manager.saveOutputFlashMap(flashMap, request, response);
}
 

/**
 * Convenience method that retrieves the {@link #getOutputFlashMap "output"
 * FlashMap}, updates it with the path and query params of the target URL,
 * and then saves it using the {@link #getFlashMapManager FlashMapManager}.
 * @param location the target URL for the redirect
 * @param request the current request
 * @param response the current response
 * @since 5.0
 */
public static void saveOutputFlashMap(String location, HttpServletRequest request, HttpServletResponse response) {
	FlashMap flashMap = getOutputFlashMap(request);
	if (CollectionUtils.isEmpty(flashMap)) {
		return;
	}

	UriComponents uriComponents = UriComponentsBuilder.fromUriString(location).build();
	flashMap.setTargetRequestPath(uriComponents.getPath());
	flashMap.addTargetRequestParams(uriComponents.getQueryParams());

	FlashMapManager manager = getFlashMapManager(request);
	Assert.state(manager != null, "No FlashMapManager. Is this a DispatcherServlet handled request?");
	manager.saveOutputFlashMap(flashMap, request, response);
}