common-logging

在springframework的spring-core中強(qiáng)制指定了使用common-logging模塊，該模塊是標(biāo)準(zhǔn)的實(shí)現(xiàn)至Jarka Common Log（JCL）的，并在runtime運(yùn)行時(shí)自動(dòng)發(fā)現(xiàn)其它框架選擇的日志組件，并定位一個(gè)認(rèn)為最接近的日志組件作為應(yīng)用日志（如果什么都沒(méi)找到，會(huì)使用JDK的LOG，(java.util.logging or JUL for short)），在maven中只需要配置了spring-core就有了

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.5.RELEASE</version>
  </dependency>
</dependencies>

SLF4J

使用SLF4J（Simple Log Factory For JAVA）需要將common-logging排除，同時(shí)需要使用SL4J橋接，將springframework的common-logging橋接到SL4J上，所以需要4個(gè)依賴，同時(shí)排除spring-core中自帶的common-logging，使用maven如下

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.5.RELEASE</version>
    <exclusions>
      <exclusion>
         <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
      </exclusion>
    </exclusions>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>jcl-over-slf4j</artifactId>
    <version>1.5.8</version>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.5.8</version>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.5.8</version>
  </dependency>
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.14</version>
  </dependency>
</dependencies>

log4j

使用log4j時(shí)不需要排除spring-core中的common-logging，同時(shí)log4j也是運(yùn)行時(shí)綁定，相當(dāng)于common-logging在運(yùn)行時(shí)綁定了log4j，maven如下

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.5.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.14</version>
  </dependency>
</dependencies>