作者：whisper

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　　slf4j+log4j的方式；

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
  <exclusions>
    <exclusion>
      <artifactId>logback-classic</artifactId>
      <groupId>ch.qos.logback</groupId>
    </exclusion>
    <exclusion>
      <artifactId>log4j-over-slf4j</artifactId>
      <groupId>org.slf4j</groupId>
    </exclusion>
  </exclusions>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
</dependency>

　　切换为log4j2

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

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

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