spring配置日志

spring默认使用了commons-logging,在集成其它日志框架,slf4j使用了编译时绑定来代替运行时发现.它注定是更高效的(当然slf4j还可以使用占位符绑定等功能).下文介绍spring三种常用方案记录日志,推荐第三种

方案一:commons-logging+Log4J

1.依赖:

< dependency>
< groupId>org.springframework </ groupId>
< artifactId>spring-context </ artifactId>
< version>${spring.version} </ version>
</ dependency>
< dependency>
< groupId>log4j </ groupId>
< artifactId>log4j </ artifactId>
< version>1.2.17 </ version>
</ dependency>

2.在classpath根目录添加log4j.properties或log4j.xml,关于开发的日志级别配置,调得太高,会漏到一些信息看不见,调得太低,输出得太多,看得眼花缭乱,在产品阶段甚至影响应用性能.我觉得开发时,默认(一般依赖也是用默认appender)给WARN,项目本身编写的代码可以给DEBUG,其它另外特别指定,以下是log4j.properties的一个例子:

log4j.rootCategory=WARN, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d {ABSOLUTE} %5p %t %c {2}:%L - %m%n

log4j.category.org.exam=DEBUG
log4j.category.org.springframework.beans.factory=INFO

根据log4j API(http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Category.html),Category已经过时,应使用Logger代替.而Logger是Category的子类,在Category的所有操作都可以在Logger上执行.以上的properties文件内容应改为

log4j.rootLogger=WARN, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d {ABSOLUTE} %5p %t %c {2}:%L - %m%n

log4j.logger.org.exam=DEBUG
log4j.logger.org.springframework.beans.factory=INFO

3.代码用法:

import org.apache.log4j.Logger;
public class UserService {
final Logger logger = Logger.getLogger(UserService.class);
public boolean save (){
logger.error( "虽然A喜欢我,但是我喜欢B");
return true;
}
}

方案二:slf4j+Log4J

1.先在spring排除commons-logging.再引入4个包:桥接包jcl-over-slf4j,SLF4J API包slf4j-api,绑定到Log4J的包slf4j-log4j12,Log4J实现包log4j12.

< dependency>
< groupId>org.slf4j </ groupId>
< artifactId>jcl-over-slf4j </ artifactId>
< version>1.7.7 </ version>
</ dependency>
< dependency>
< groupId>org.slf4j </ groupId>
< artifactId>slf4j-log4j12 </ artifactId>
< version>1.7.7 </ version>
</ dependency>
< dependency>
< groupId>org.springframework </ groupId>
< artifactId>spring-context </ artifactId>
< version>${spring.version} </ version>
< exclusions>
< exclusion>
< groupId>commons-logging </ groupId>
< artifactId>commons-logging </ artifactId>
</ exclusion>
</ exclusions>
</ dependency>

2.log4j配置同上.

3.代码用法:

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UserService {
final Logger logger = LoggerFactory.getLogger(UserService.class);
public boolean save (){
logger.error( "虽然{}喜欢我,但是我喜欢{}", "A", "B");
return true;
}
}

方案三:slf4j+logback.其中,logback是slf4j原生的实现.

1.先引入logback-classic依赖,它会将其它依赖引入,再在spring排除commons-logging.

< dependency>
< groupId>ch.qos.logback </ groupId>
< artifactId>logback-classic </ artifactId>
< version>1.1.3 </ version>
</ dependency>
< dependency>
< groupId>org.springframework </ groupId>
< artifactId>spring-webmvc </ artifactId>
< version>${spring.version} </ version>
< exclusions>
< exclusion>
< groupId>commons-logging </ groupId>
< artifactId>commons-logging </ artifactId>
</ exclusion>
</ exclusions>
</ dependency>

2.logback配置:查找顺序logback.groovy-->logback-test.xml-->logback.xml,详细配置还是参考文档http://logback.qos.ch/documentation.html .下面是logback.xml例子

<?xml version= "1.0" encoding= "UTF-8" ?>
< configuration>
< appender name= "console" class= "ch.qos.logback.core.ConsoleAppender">
< encoder>
< pattern>%d{yy.MM.dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n </ pattern>
</ encoder>
</ appender>
< logger name= "org.exam" level= "debug" />
< logger name= "org.springframework.beans.factory" level= "info" />
< root level= "warn">
< appender-ref ref= "console"/>
</ root>
</ configuration>

3.代码用法:同方案二一样

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原文链接:https://blog.csdn.net/xiejx618/article/details/41698913

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[这个贴子最后由 flybird 在 2020-03-10 12:25:25 重新编辑]

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