SpringBoot-日志系统

官方文档： 

https://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html\#howto-configure-logback-for-logging

通过看文档整理以下几点：

1.Spring Boot 通过引入 spring-boot-starter-web 模块即可引入日志相关依赖包。

2.Spring Boot 根据类路径下的相关日志框架的依赖包去自动构建日志系统。首选日志框架是 Logback。 

**83.1 Configure Logback for Logging **

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1<?xml version="1.0" encoding="UTF-8"?>

2<configuration>

3   <include resource="org/springframework/boot/logging/logback/base.xml"/>

4   <logger name="org.springframework.web" level="DEBUG"/>

5</configuration>

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83.1.1 Configure Logback for File-only Output

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1<?xml version="1.0" encoding="UTF-8"?>

2<configuration>

3   <include resource="org/springframework/boot/logging/logback/defaults.xml" />

4   <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>

5   <include resource="org/springframework/boot/logging/logback/file-appender.xml" />

6   <root level="INFO">

7       <appender-ref ref="FILE" />

8   </root>

9</configuration>

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 Demo

在 src/main/resource 下创建文件 logback-spring.xml

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1<?xml version="1.0" encoding="UTF-8"?>

2<configuration>

3    <include resource="org/springframework/boot/logging/logback/defaults.xml" />

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5    <property name="LOG_FILE" value="d:/log/my.log"/>

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7    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />

8    <include resource="org/springframework/boot/logging/logback/file-appender.xml" />

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10    <root level="INFO">

11        <appender-ref ref="CONSOLE" />

12        <appender-ref ref="FILE" />

13    </root>

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15    <logger name="org.springframework.web" level="INFO"/>

16</configuration>

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相关技术点

1.可以设置不同功能模块的日志级别

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1logging.level.org.springframework.web=DEBUG

2logging.level.org.hibernate=ERROR

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2.可以更改日志配置文件的存储位置

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1logging.config=classpath:logback-spring.xml

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3.源码切入点

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1LoggingApplicationListener

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