如何使用Springboot自定义过滤器记录跟踪id

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

public class TrackingFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        String trackingId = generateTrackingId(); // 生成跟踪ID的方法，可以根据实际需求进行实现

        // 在请求头中添加跟踪ID
        httpRequest.addHeader("X-Tracking-ID", trackingId);

        // 执行过滤器链
        chain.doFilter(request, response);
    }

    // 生成跟踪ID的方法示例
    private String generateTrackingId() {
        // 实现自己的跟踪ID生成逻辑，可以使用UUID等方式生成唯一的ID
        return UUID.randomUUID().toString();
    }

    // 其他方法，如初始化和销毁方法，可以根据需要进行实现
}

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfig {

    @Bean
    public FilterRegistrationBean<TrackingFilter> trackingFilterRegistrationBean() {
        FilterRegistrationBean<TrackingFilter> registrationBean = new FilterRegistrationBean<>();
        registrationBean.setFilter(new TrackingFilter());
        registrationBean.addUrlPatterns("/*"); // 设置过滤器的URL模式，这里设置为拦截所有请求
        return registrationBean;
    }

    // 其他配置和Bean定义
}

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

public class TrackingFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        String trackingId = httpRequest.getHeader("X-Tracking-ID");

        // 在这里可以记录或处理跟踪ID，例如将其写入日志或存储到数据库

        chain.doFilter(request, response);
    }

    // 其他方法，如初始化和销毁方法，可以根据需要进行实现
}