```java
RequestCache requestCache = new HttpSessionRequestCache();
```
将请求缓存到session中。
```java
SavedRequest savedRequest = requestCache.getRequest(request, response);
```
获取被保存的请求。示例：
```java
@RestController
public class BrowserSecurityController {
private RequestCache requestCache = new HttpSessionRequestCache();
private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();
@GetMapping("/authentication/require")
@ResponseStatus(HttpStatus.UNAUTHORIZED)
public String requireAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {
SavedRequest savedRequest = requestCache.getRequest(request, response);
if (savedRequest != null) {
String targetUrl = savedRequest.getRedirectUrl();
if (StringUtils.endsWithIgnoreCase(targetUrl, ".html"))
redirectStrategy.sendRedirect(request, response, "/login.html");
}
return "访问的资源需要身份认证！";
}
}
```
