Spring过滤器中OncePerRequestFilter应用实现

import org.springframework.web.filter.OncePerRequestFilter;  
import javax.servlet.FilterChain;  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
import java.io.IOException;  
  
public class TimingFilter extends OncePerRequestFilter {  
  
    @Override  
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)  
            throws ServletException, IOException {  
          
        // 记录请求开始时间  
        long startTime = System.currentTimeMillis();  
          
        // 继续过滤器链  
        filterChain.doFilter(request, response);  
          
        // 记录请求处理时间  
        long endTime = System.currentTimeMillis();  
        long duration = endTime - startTime;  
        System.out.println("Request took " + duration + " ms to process");  
    }  
}

import org.springframework.boot.web.servlet.FilterRegistrationBean;  
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.Configuration;  
  
@Configuration  
public class FilterConfig {  
  
    @Bean  
    public FilterRegistrationBean<TimingFilter> timingFilterRegistration() {  
        FilterRegistrationBean<TimingFilter> registration = new FilterRegistrationBean<>();  
        registration.setFilter(new TimingFilter());  
        registration.addUrlPatterns("/*"); // 设置过滤器拦截的URL模式  
        return registration;  
    }  
}