1.相關概念

日志統一框架(日志門面)：apache commons logging、slf4j

日志實現框架(實現層)：JDK自帶的logging(java.util.logging)、log4j、Java Util Logging、log4j2、logback.

(1)JDK自帶的logging(java.util.logging)用法：

1 importjava.util.logging.Logger;2

3 public classIfTest{4 private static final Logger logger=Logger.getLogger(IfTest.class.getName());5

6 public static voidmain(String args[]) {7 logger.info("Hello world!");8 }9

10 }

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(2)log4j的使用:

log4j

log4j

1.2.17

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1 importorg.apache.log4j.Logger;2

3 /**

4 * Hello world!5 *6 */

7 public classLog4jtest8 {9 private static final Logger logger=Logger.getLogger(Log4jtest.class);10

11 public static voidmain( String[] args )12 {13 logger.info("Hello world!");14 }15 }

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相應的配置文件log4j.properties

log4j.rootLogger =debug, console

log4j.appender.console=org.apache.log4j.ConsoleAppender

log4j.appender.console.layout=org.apache.log4j.PatternLayout

log4j.appender.console.layout.ConversionPattern= %-d{yyyy-MM-dd HH:mm:ss} %m%n

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(3)log4j2的使用:

org.apache.logging.log4j

log4j-api

2.2

org.apache.logging.log4j

log4j-core

2.2

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1 importorg.apache.log4j.LogManager;2 importorg.apache.log4j.Logger;3

4 public classLog4j2test {5 private static final Logger logger=LogManager.getLogger(Log4j2test.class);6 public static voidmain(String[] args) {7 logger.info("Hello world!");8 }9 }

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相應的配置文件log4j2.xml?(目前log4j2只支持xml json yuml，不再支持properties文件)

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

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(4)logback的使用：

1

2

3 ch.qos.logback

4 logback-core

5 1.1.3

6

7

8 ch.qos.logback

9 logback-classic

10 1.1.3

11

12

13 org.slf4j

14 slf4j-api

15 1.7.12

16

17

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1 importorg.slf4j.Logger;2 importorg.slf4j.LoggerFactory;3

4 public classLogbackTest {5 private static final Logger logger=LoggerFactory.getLogger(LogbackTest.class);6 public static voidmain(String[] args) {7 logger.info("Hello world!");8 }9 }

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配置文件logback.xml

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

2

3

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5

6 %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n

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2.spring boot中日志管理

Spring Boot uses Commons Logging for all internal logging, but leaves the underlying log implementation open. Default configurations are provided for Java Util Logging,Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file output also available.

By default, If you use the ‘Starters’, Logback will be used for logging. Appropriate Logback routing is also included to ensure that dependent libraries that use Java Util Logging, Commons Logging, Log4J or SLF4J will all work correctly.

Spring Boot在所有內部日志中使用Commons Logging，但是默認配置也提供了對常用日志的支持，如：Java Util Logging，Log4J, Log4J2和Logback。每種Logger都可以通過配置使用控制臺或者文件輸出日志內容。

如果使用了spring boot的Starter，默認情況下使用Logback作為日志管理。

直接在application.properties文件中配置：

logging.level.root=WARN

logging.level.org.springframework.web=DEBUG

logging.file=/log/log/my.log

logging.pattern.console=%d{yyyy/MM/dd-HH:mm:ss} [%thread]%-5level %logger- %msg%n

logging.pattern.file=%d{yyyy/MM/dd-HH:mm} [%thread] %-5level %logger- %msg%n

或者單獨配置Logback的配置文件。

Logging SystemCustomization

Logback

logback-spring.xml,?logback-spring.groovy,?logback.xml?or?logback.groovy

Log4j2

log4j2-spring.xml?or?log4j2.xml

JDK (Java Util Logging)

logging.properties

鏈接：https://pan.baidu.com/s/1ynSXl5xhZfpK7sqhcne0Zg

提取碼：rip3

參考：

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