springboot Log4j configuration (printing log output console)

In springboot integration mybatis development process, Log4j configuration file in order to view the process Mybatis operation of the database

Editor: IDEA

Step: pom.xml introducing dependency (dependency and log4j2 MyBatis dependent)

as follows:

# The spring-boot-starter-web in dependence logging automatically configured, in use need to preclude reliance Log4j

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

# Depend on the introduction of Log4j2

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

Step Two: Log4j configuration .xml file, file location: src / mian / resources (after introduction Log4j dependent, springboot automatically loads Log4j2.xml file)

The basic configuration XML file is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN" monitorInterval="30">
    <Properties>
        <Property name="LOG_PATTERN">
            %d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${hostName} --- [%15.15t] %-40.40c{1.} : %m%n%ex
        </Property>
    </Properties>
    <Appenders>
        <Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
            <PatternLayout pattern="${LOG_PATTERN}"/>
        </Console>
    </Appenders>
    <Loggers>
        <Logger name="#{这里填写.mapper包}" level="trace"   additivity="false">
            <AppenderRef ref="ConsoleAppender" />
        </Logger>

        <Root level="info">
            <AppenderRef ref="ConsoleAppender" />
        </Root>
    </Loggers>
</Configuration>

In the above <Logger> </ Logger> in Level = "trace", the lowest level Mybatis log is trace, in this log level, Mybatis outputs detailed information about SQL during execution, this level is particularly suitable for use in the development process .

Print Results:

To achieve the above basic configuration, if you want to achieve a log file can be output as a reference address: https://www.callicoder.com/spring-boot-log4j-2-example/

Original Address: https: //blog.csdn.net/U201311105/article/details/85238874