使用Log4J收集日志

一：搭建好Selenium+testNG+Maven环境，可参考

http://www.cnblogs.com/hc1020/p/8602863.html

二：百度搜索Maven仓库，然后搜索Log4j.jar，点击需要的版本，Copy如下的信息至Pom.xml中（本博主选的是1.2.17版本）

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

三：在src这个根目录下创建Log4j.properties文件，然后搜索Log4j配置Copy到Log4j.properties中。Log4j配置如下：

### u8BBEu7F6E###
log4j.rootLogger = debug,stdout,D,E

### u8F93u51FAu4FE1u606Fu5230u63A7u5236u62AC ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

### u8F93u51FADEBUG u7EA7u522Bu4EE5u4E0Au7684u65E5u5FD7u5230=E://logs/error.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = logs/log.log   
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### u8F93u51FAERROR u7EA7u522Bu4EE5u4E0Au7684u65E5u5FD7u5230=E://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = logs/error.log 
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

四：在需要调用的类中，引用

Logger logger=Logger.getLogger(类名.class);

然后调用即可

logger.info("This is Log4j information");