本文共 3974 字，大约阅读时间需要 13 分钟。

问题描述

日志是排查问题的重要依据，但是有时不容易定位报错信息，不明确哪条错误信息对应哪次请求。如果给日志加上唯一的追踪ID，排查就方便多了。

开发环境

• SpringBoot - 2.1.10.RELEASE
• JDK 1.8

创建过滤器

package com.nobody.filter;import java.io.IOException;import java.util.UUID;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import org.slf4j.MDC;/** * 过滤器，每次请求设置日志唯一追踪ID *  * @author Μr.ηobοdy * * @date 2020-04-29 * */public class LogMDCFilter implements Filter {
       @Override    public void init(FilterConfig filterConfig) throws ServletException {
       }    @Override    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,            FilterChain filterChain) throws IOException, ServletException {
           String requestIdKey = "requestId";        String requestId = UUID.randomUUID().toString().replace("-", "");        MDC.put(requestIdKey, requestId);        try {
               filterChain.doFilter(servletRequest, servletResponse);        } finally {
               MDC.remove(requestIdKey);        }    }    @Override    public void destroy() {
       }}

注册过滤器

package com.nobody.ehr.config;import org.springframework.boot.web.servlet.FilterRegistrationBean;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.nobody.ehr.filter.LogMDCFilter;/** * 注册日志过滤器 *  * @author Μr.ηobοdy * * @date 2020-04-29 * */@Configurationpublic class FilterConfig {
       @Bean    public FilterRegistrationBean
   
     logFilterRegistration() {
           FilterRegistrationBean
    
      registration =                new FilterRegistrationBean
     
      ();        // 注入过滤器        registration.setFilter(new LogMDCFilter());        // 拦截规则        registration.addUrlPatterns("/*");        // 过滤器名称        registration.setName("logMDCFilter");        // 过滤器顺序        registration.setOrder(0);        return registration;    }}
     
    
   

返回值封装

package com.nobody.ehr.exception;import org.slf4j.MDC;import lombok.Getter;import lombok.Setter;import lombok.ToString;/** * 异常数据封装 *  * @author Μr.ηobοdy * * @date 2020-03-12 * */@Getter@Setter@ToStringpublic class RestErrorData {
       private String error;    private int error_code;    private String error_description;    private String error_uri;    private String requestId = MDC.get("requestId");    public RestErrorData() {
           super();    }    public RestErrorData(String error, int error_code, String error_description) {
           super();        this.error = error;        this.error_code = error_code;        this.error_description = error_description;    }    public RestErrorData(RestAPIError restAPIError) {
           super();        this.error = restAPIError.error;        this.error_code = restAPIError.error_code;        this.error_description = restAPIError.error_description;    }}

logback.xml文件，其中%X{requestId}就是唯一追踪ID的值

   
   	
    	
    	
    	
    	
    		
     			
      
       ${
   layout}
      		
     	
    	
    		
     
      ./logs/server.log
     		
     			
      
       ./logs/server%d{
   yyyy-MM-dd}_%i.log
      			
      
       ${
   maxHistory}
      			
      				
       
        ${
   maxFileSize}
       			
      		
     		
     			
      
       UTF-8
      			
      
       ${
   layout}
      		
     	
    	
    		
     
      0
     		
     	
    	
    		
     		
     	
    	
    	
    		
     
      ./logs/motan.log
     		
     			
      
       ./logs/motan.log.%d{
   yyyy-MM-dd}.%i			
      			
      
       ${
   maxHistory}
      			
      				
       
        ${
   maxFileSize}
       			
      		
     		
     			
      
       UTF-8
      			
      				
       
        ${
   layout}
       			
      		
     	
    	
    		
     
      0
     		
     		
     	
    	
    		
     	
    	
    		
     	
    
   

验证结果：

转载地址：https://javalib.blog.csdn.net/article/details/105844926 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！