logback入门实例
java：
package com;

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

public class Test
{
/**
* 日志记录
*/
private Logger logger = LoggerFactory.getLogger("traceInfo");
/**
* 目录信息
*/
private Logger categoryInfo = LoggerFactory.getLogger("categoryInfo");

/**
* 目录与目录的关联关系
*/
private Logger productInfo = LoggerFactory.getLogger("productInfo");

public void print()
{
// 日志记录
if (logger.isDebugEnabled())
{
logger.debug("Entry: print().");
}
categoryInfo.info("categoryInfo");
productInfo.info("productInfo");
// 日志记录
if (logger.isDebugEnabled())
{
logger.debug("Exit: print().");
}

}

/**
* @param args
*/
public static void main(String[] args)
{
new Test().print();

}

}
config：
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="log.path" value="E:\\crawl\\spider\\output" />
<appender name="traceInfo" level="info" additivity="false">
<appender-ref ref="categoryAppender" />
</logger>

<logger name="productInfo" level="info" additivity="false">
<appender-ref ref="productAppender" />
</logger>

<root level="INFO">
<appender-ref ref="traceInfo" />
</root>
</configuration>