Spring Boot 2.2.5。如何在Spring Filter中检索PathVariable参数

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // 初始化操作
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;

        // 获取所有请求参数的映射
        Map<String, String[]> parameterMap = httpRequest.getParameterMap();

        // 遍历请求参数映射
        for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {
            String paramName = entry.getKey();
            String[] paramValues = entry.getValue();

            // 检查是否为PathVariable参数
            if (httpRequest.getAttribute(paramName) != null) {
                // 处理PathVariable参数
                String pathVariableValue = (String) httpRequest.getAttribute(paramName);
                // 进行相应的处理逻辑
            }
        }

        // 继续处理请求
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        // 销毁操作
    }
}