Question

我希望将我的字符串添加为app中每条日志消息的前缀。我的意思是，我有几个java应用程序，我想要一个在消息中有一些前缀，如：

DATE, INFO(or other), [sample] (-->this is my added string) , rest of standard message

我看过几个教程，但没有一个能适合我。我已经将依赖包含在pom中了：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

你有什么技巧或简单的解决方案吗？要编写某种包装器或配置类？

Answer 1

映射诊断上下文（MDC）日志记录允许您设置与当前线程关联的属性，以便SLF4J（通过您的记录器实现库）可以使用每个日志记录语句记录这些属性，而无需指定它。所以你需要的是把你的前缀文本放在MDC中。如果您正在使用Spring MVC，那么一种方法是实现HandlerInterceptor。

import org.slf4j.MDC;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoggingInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        MDC.put("PREFIX", "your text");
        return true;
    }

    @Override
    public void afterConcurrentHandlingStarted(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        MDC.clear();
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        MDC.clear();
    }
}

import com.tigerit.kai.education.util.LoggingInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class BeanConfiguration {

   @Bean
   public LoggingInterceptor loggingHandlerInterceptor() {
      return new LoggingInterceptor();
   }

   @Bean
   public WebMvcConfigurerAdapter webConfigurer() {
      return new WebMvcConfigurerAdapter() {
         @Override
         public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(loggingHandlerInterceptor());
         }
      };
   }
}

最后在application.properties

中添加以下内容

logging.pattern.console=%d %-4r [%thread] %-5level PREFIX=%X{PREFIX} - %msg%n

在spring mvc log4j

1 个答案: