Spring Boot日志配置logback,log4j

spring boot默认日志输出内容比较简单而且少，所以要改一下配置。 
目前实现slf4j有logbak和log4j，logback性能好点，目前在用。 
具体做法： 
resource目录下增加logback-spring.xml下载，spring会自动检测。 

Xml代码  

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <configuration>  
3.     <!-- 控制台输出 -->  
4.     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
5.         <layout class="ch.qos.logback.classic.PatternLayout">  
6.             <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->  
7.             <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{30} [%file:%line]-%msg%n  
8.             </pattern>  
9.         </layout>  
10.     </appender>  
11.     <root level="${log.root.level}">  
12.         <appender-ref ref="STDOUT" />  
13.     </root>  
14. </configuration>  

${log.root.level}这里是不同环境的切换 
在pom.xml中下载配置maven-resources-plugin，当通过 mvn clean package -Pdev 打包的时候会自动替换成对应profile值 

Xml代码  

1. <profiles>  
2.         <profile>  
3.             <id>dev</id>  
4.             <properties>  
5.                 <profiles.active>dev</profiles.active>  
6.                 <maven.test.skip>true</maven.test.skip>  
7.                 <scope.jar>compile</scope.jar>  
8.                 <log.root.level>DEBUG</log.root.level>  
9.             </properties>  
10.             <activation>  
11.                 <activeByDefault>true</activeByDefault>  
12.             </activation>  
13.         </profile>  
14.         <profile>  
15.             <id>test</id>  
16.             <properties>  
17.                 <profiles.active>test</profiles.active>  
18.                 <maven.test.skip>true</maven.test.skip>  
19.                 <scope.jar>provided</scope.jar>  
20.                 <log.root.level>DEBUG</log.root.level>  
21.             </properties>  
22.         </profile>  
23.         <profile>  
24.             <id>prod</id>  
25.             <properties>  
26.                 <profiles.active>prod</profiles.active>  
27.                 <maven.test.skip>true</maven.test.skip>  
28.                 <scope.jar>provided</scope.jar>  
29.                 <log.root.level>INFO</log.root.level>  
30.             </properties>  
31.         </profile>  
32.     </profiles>