以下是一个使用Spring MVC拦截器来控制JSP页面访问权限的简单实例。
创建一个拦截器类,继承自`HandlerInterceptor`接口:

```java
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
// 检查用户是否已经登录
Object user = request.getSession().getAttribute("







