SpringBoot 整合 Shiro和Log4j2

引入POM.xml

（最新依赖 https://mvnrepository.com/ ）
shiro

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring-boot-starter</artifactId>
            <version>1.7.1</version>
        </dependency>

log4j

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

log4j-slf4j-impl

        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>2.14.1</version>
        </dependency>

排除SpringBoot自带的logging

spring-boot的依赖中默认支持日志spring-boot-starter-logging，需要去掉之后log4j2才可以生效，否则包冲突。

<exclusions><!-- 去掉springboot默认配置 -->
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
 <exclusions>

自带的依赖会又很多携带日志，一点要全部排除：
示例

...
<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions><!-- 去掉springboot默认配置 -->
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
            <exclusions><!-- 去掉springboot默认配置 -->
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
...

配置log4j2.xml

默认地址在resources下，示例（特别简单）

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appenders>
        <console name="Console" target="SYSTEM_OUT">
            <!--<patternlayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%p] %c %m
            %n"/>-->
            <patternlayout pattern="&#128051; [%p] %m %n"/>
        </console>
    </appenders>
    ALL -->
    <loggers>
            <appender-ref ref="Console"/>
        </root>
    </loggers>
</configuration>

如何自定义地址?

添加配置文件
application.yml

  logging:
  config: classpath:/mylog/mylog4j2.xml

或者
application.properties

logging.config=classpath:/mylog/mylog4j2.xml
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