如何使用Servlet过滤器获取请求/响应有效负载

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

public class PayloadFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // 初始化过滤器
    }

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

        // 获取请求的有效负载
        String requestPayload = httpRequest.getReader().lines().reduce("", (accumulator, actual) -> accumulator + actual);

        // 获取响应的有效负载
        ResponseWrapper responseWrapper = new ResponseWrapper(httpResponse);
        chain.doFilter(request, responseWrapper);
        String responsePayload = responseWrapper.getResponsePayload();

        // 在控制台输出请求和响应的有效负载
        System.out.println("Request Payload: " + requestPayload);
        System.out.println("Response Payload: " + responsePayload);

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

    @Override
    public void destroy() {
        // 销毁过滤器
    }
}

<filter>
    <filter-name>PayloadFilter</filter-name>
    <filter-class>com.example.PayloadFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>PayloadFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>