springboot集成log4j（完成错误信息邮件发送）

springboot项目pom.xml修改如下，其他不变，运行springboot完成！！！

<dependencies>
  <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>

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
   <groupId>log4j</groupId>
   <artifactId>log4j</artifactId>
   <version>1.2.17</version>
</dependency>
    <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
<dependency>
   <groupId>javax.mail</groupId>
   <artifactId>mail</artifactId>
   <version>1.4.7</version>
</dependency>
    <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
<dependency>
   <groupId>javax.activation</groupId>
   <artifactId>activation</artifactId>
   <version>1.1.1</version>
</dependency>