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spring5新特性-日志文件

夏天的枫_ 2022-04-03 阅读 62
java

日志文件(可以找出程序哪里出的错误) 通用的日志封装

1.引入四个jar包 

 

<dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.11.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.11.2</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.30</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-slf4j-impl</artifactId>
        <version>2.11.2</version>
    </dependency>

2.写log4f2.xml文件(文件名不能出错),这样只要程序出错,就会显示出错日志

 

 

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO" >

    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] [%-5level] %logger{36} - %l - %msg%n"/>
        </Console>
    </Appenders>
    <Loggers>

        <Root level="all">
            <appender-ref ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

 3.或者可以新建一个logconfig类

package org.hxut.zyk;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.xml.soap.Text;

public class log4j2 {
    public static final Logger log= LoggerFactory.getLogger(log4j2.class);

    public static void main(String[] args) {
        log.info("hello lo4j2_info");
        log.warn("hello lo4j2_warn");
    }
}

 

 

 

 

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