spring 日志存留时间 spring操作日志

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mob64ca140eb362 2024-02-08 13:28:09

文章标签 spring 日志存留时间 spring apache xml 文章分类 架构后端开发

日志打印是一个项目中必不可少的部分，没有日志打印，我们的代码的可维护性将会非常的差，为了能让我们的代码便于自己调试也便于别人维护，所以在项目中必须要打印日志，所以此文要解决的问题就是在spring项目中如何配置log日志。

1.首先目录结构是这样的：

spring 日志存留时间 spring操作日志_xml

注：红色标注的部分为运行项目后实际生成的log文件

2.pom文件是这样的

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zlb.springaop</groupId>
    <artifactId>spring-aop</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--spring核心依赖-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.8.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.1.8.RELEASE</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.1.8.RELEASE</version>
        </dependency>

        <!--sping aop 所必须依赖的jar包-->
        <!-- https://mvnrepository.com/artifact/aopalliance/aopalliance -->
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/aspectj/aspectjrt -->
        <dependency>
            <groupId>aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.5.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

    </dependencies>


</project>

注意：

aopalliance依赖一定不能少，如果少了就会报如下异常

org.springframework.beans.factory.BeanCreationExcspring-aopeption: Error creating bean with name 'org.springframework.aop.config.internalAutoProxyCreator': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator]: Constructor threw exception; nested exception isJava.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor

3.log4j.xml文件这样写

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

	<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%p][%d{ISO8601}][%t][%c][%m]%n" />
		</layout>
	</appender>

	<!--class定义日志记录器-->
	<appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
		<!--相对于应用服务器的输出路径,应用服务器的路径指定在common包中指定-->
		<param name="File" value="springaop/log/debug/app-debug.log" />
		<!--是否追加写入文件 true-是 false-否,此部分不建议改动-->
		<param name="Append" value="true" />
		<!--当日志文件超过定义数值则自动备分一个新文件-->
		<!--可以定义为1MB,1KB,1GB这样的类型,也可以定义为1000则表示1000字节-->
		<param name="MaxFileSize" value="30MB" />
		<!--备分文件最多的数量-->
		<param name="MaxBackupIndex" value="30" />
		<!--输出的日志文件格式,根据操作系统编码指定-->
		<param name="Encoding" value="UTF8" />
		<!--log4j的打印日志布局,可参考相关log4j文档设置-->
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%p][%d{ISO8601}][%t][%c][%m]%n" />
		</layout>
		<!--日志级别过滤器-->
		<!--LevelMin表示最小的级别,LevelMax表示最大的级别,建议不做改动-->
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="DEBUG" />
			<param name="LevelMax" value="DEBUG" />
		</filter>
	</appender>

	<appender name="INFO" class="org.apache.log4j.RollingFileAppender">
		<param name="File" value="springaop/log/debug/app-debug.log" />
		<!--<param name="File" value="D:/Program Files/log/info/app-info.log" />-->
		<param name="Append" value="true" />
		<param name="MaxFileSize" value="30MB" />
		<param name="MaxBackupIndex" value="30" />
		<param name="Encoding" value="UTF8" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%p][%d{ISO8601}][%t][%c][%m]%n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="INFO" />
			<param name="LevelMax" value="INFO" />
		</filter>
	</appender>

	<appender name="WARN" class="org.apache.log4j.RollingFileAppender">
		<param name="File" value="springaop/log/debug/app-debug.log" />
		<param name="Append" value="true" />
		<param name="MaxFileSize" value="30MB" />
		<param name="MaxBackupIndex" value="30" />
		<param name="Encoding" value="UTF8" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%p][%d{ISO8601}][%t][%c][%m]%n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="WARN" />
			<param name="LevelMax" value="WARN" />
		</filter>
	</appender>

	<appender name="ERROR" class="org.apache.log4j.RollingFileAppender">
		<param name="File" value="springaop/log/debug/app-debug.log" />
		<!--<param name="File" value="D:/Program Files/log/error/app-error.log" />-->
		<param name="Append" value="true" />
		<param name="MaxFileSize" value="30MB" />
		<param name="MaxBackupIndex" value="30" />
		<param name="Encoding" value="UTF8" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="[%p][%d{ISO8601}][%t][%c][%m]%n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="ERROR" />
			<param name="LevelMax" value="ERROR" />
		</filter>
	</appender>

	<logger name="mapper/userMapper.xml">
		<level value="DEBUG"></level>
		<appender-ref ref="STDOUT"></appender-ref>
	</logger>
	<root>
		<!--定义日志的最低输出级别-->
		<priority value="INFO" />
		<appender-ref ref="STDOUT" />
		<appender-ref ref="DEBUG" />
		<appender-ref ref="INFO" />
		<appender-ref ref="WARN" />
		<appender-ref ref="ERROR" />
	</root>

</log4j:configuration>

注意：<param name="File" value="springaop/log/debug/app-debug.log" />

这就是你想要log文件写出的地址！

4.java类这样写

（1）LogAspect

package com.zlb.spring.aop;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import java.util.Arrays;

@Component
@Aspect
@Order(1)
public class LogAspect {
    private org.apache.log4j.Logger logger = Logger.getLogger(this.getClass());
    @Pointcut("execution(public * com.zlb.spring.aop.*.*(..))")
    public  void  pointCut(){}

    @Before("pointCut()")
    public void doBefore(JoinPoint joinPoint){
        logger.info("class_method : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName()+" start");
        logger.info("args : " + Arrays.toString(joinPoint.getArgs()));
    }

    @After("pointCut()")
    public void doAfter(JoinPoint joinPoint){
        logger.info("class_method : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName()+" end");
    }

    @AfterReturning(returning ="result",value = "pointCut()")
    public void doAfterReturning(Object result){
       logger.info("returned"+result);
    }

    @AfterThrowing(value = "pointCut()",throwing = "exception")
    public void doAfterThrowing(Exception exception){
        logger.info("method exception"+exception.getMessage());
    }
}

注意：

@AfterReturning与@AfterThrowing所标记的方法，参数位置不能改变！

（2）LogConfig这样写

package com.zlb.spring.aop;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@ComponentScan(value = "com.zlb.spring.aop")
@Configuration
@EnableAspectJAutoProxy
public class LogConfig {
}

注意：如果用spring注解方式开发项目，一定要使用@EnableAspectJAutoProxy注解，不然没法实现aop

（3）被测试的目标方法类这样写

package com.zlb.spring.aop;

import org.springframework.stereotype.Component;

@Component
public class MathCalculator {
    public int getDiv(int x,int y){
        return x/y;
    }
}

（4）测试类这样写

package com.zlb.spring.aop;

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class TestAop {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(LogConfig.class);
        System.out.println("ioc 容器舒适化完成！");
        //打印logger日志
        MathCalculator mathCalculator = applicationContext.getBean(MathCalculator.class);
        mathCalculator.getDiv(6,0);
    }
}

运行结果长这样：

ioc 容器舒适化完成！
[INFO][2019-06-27 19:09:15,758][main][com.zlb.spring.aop.LogAspect][class_method : com.zlb.spring.aop.MathCalculator.getDiv start]
[INFO][2019-06-27 19:09:15,759][main][com.zlb.spring.aop.LogAspect][args : [6, 1]]
[INFO][2019-06-27 19:09:15,787][main][com.zlb.spring.aop.LogAspect][class_method : com.zlb.spring.aop.MathCalculator.getDiv end]
[INFO][2019-06-27 19:09:15,787][main][com.zlb.spring.aop.LogAspect][returned6]

Process finished with exit code 0

思考：如果 MathCalculator mathCalculator = applicationContext.getBean(MathCalculator.class);

改成 MathCalculator mathCalculator = new MathCalculator（）还能实现日志打印吗？

答：这样是不能的，因为切面日志只能管理spring容器中的bean，而不能管理我们手动创建的bean。

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