Java程序中的Log文件配置

log4j.properties文件

log4j.rootLogger=info,stdout,logfile

#stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} [%p]-[%C %M %L]-%m%n

#logfile
log4j.appender.logfile=org.apache.log4j.RollingFileAppender
log4j.appender.logfile.File=/usr/local/logs/xx.log
log4j.appender.logfile.MaxFileSize=128MB
log4j.appender.logfile.MaxBackupIndex=100
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} [%p]-[%C %M %L]-%m%n

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Spring和log4j结合

<!-- 属性注入器，用于读取项目配置文件中的属性 -->
<bean class="org.springframework.beans.factory.config.PropertiesFactoryBean" id="configProperties">
　　<property name="locations">
　　　　<list>
　　　　　　<value>classpath*:log4j.properties</value>
　　　　</list>
　　</property>
</bean>

三种方式：
第一种(Log)：

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

private static Log log = LogFactory.getLog(XXX.class);
log.info("**");

<dependency>
　　<groupId>commons-logging</groupId>
　　<artifactId>commons-logging</artifactId>
　　<version>1.1.1</version>
</dependency>

第二种(Log4J)：

import org.apache.log4j.Logger;

private static Logger log = Logger.getLogger(XXX.class);
log.info("**");

<dependency>
　　<groupId>log4j</groupId>
　　<artifactId>log4j</artifactId>
　　<version>1.2.17</version>
</dependency>

第三种(slf4j):

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

private static final Logger log = LoggerFactory.getLogger(XXX.class);
log.info("**");

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.0</version>
</dependency>