解决spring-boot-starter-logging与log4j冲突

• 使用excusions来排除spring-boot-starter对spring-boot-starter-logging的依赖，然后引入log4j-slf4j-impl

     <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>