log4j控制台日志信息，根据不同级别，以颜色显示

下面说的让控制台日志颜色高亮显示，是分两种情况的。

一。 在eclipse控制台

此时，用的比较简单的实现方式。不需要其它工具类。

warn,error,fatal级别以红色显示。debug,info, 默认的颜色

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

	<!-- Appenders -->
	<appender name="CONSOLE.ERR" class="org.apache.log4j.ConsoleAppender">
		<param name="target" value="System.err" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern"
				value="%-5p: %c - %m%n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="warn" />
			<param name="LevelMax" value="fatal" />
			<param name="AcceptOnMatch" value="false" />
		</filter>
	</appender>

	<appender name="CONSOLE.OUT" class="org.apache.log4j.ConsoleAppender">
		<param name="target" value="System.out" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern"
				value="%-5p: %c - %m%n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="debug" />
			<param name="LevelMax" value="info" />
			<param name="AcceptOnMatch" value="false" />
		</filter>
	</appender>
	
	<logger name="com.errout">
		<level value="debug" />
	</logger>


	<!-- Root Logger -->
	<root>
		<priority value="warn" />
		<appender-ref ref="CONSOLE.ERR" />
		<appender-ref ref="CONSOLE.OUT" />
	</root>

</log4j:configuration>

package com.errout;

import org.apache.log4j.Logger;

public class TestErrOut {

	private static final Logger logger = Logger.getLogger(TestErrOut.class);
	
	public static void main(String[] args) {
		logger.debug(" This is debug!!!");
		logger.info(" This is info!!!");
		logger.warn(" This is warn!!!");
		logger.error(" This is error!!!");
		logger.fatal(" This is fatal!!!");
	}

}

二。 使用jcabi-log-0.2.1.jar 

官网 http://www.jcabi.com/jcabi-log/multicolor.html

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">


	<appender name="multicolorConsole" class="org.apache.log4j.ConsoleAppender">
    <layout class="com.jcabi.log.MulticolorLayout">
        <param name="ConversionPattern" value="[%color{%-5p}] %c: %m%n" />
    </layout>
	</appender>

	<logger name="com.jcabi">
		<level value="debug" />
	</logger>
	
	<!-- Root Logger -->
	<root>
		<priority value="warn" />
		<appender-ref ref="multicolorConsole" />
	</root>

</log4j:configuration>

package com.jcabi;

import org.apache.log4j.Logger;

/**
 * 使用Jcabi来让log4j控制台颜色显示
 * @author Lena yang
 *
 */
public class TestJcabi {
	
	private static final Logger logger = Logger.getLogger(TestJcabi.class);
	
	
	public static void main(String arg[]){
		logger.debug(" This is debug!!!");
		logger.info(" This is info!!!");
		logger.warn(" This is warn!!!");
		logger.error(" This is error!!!");
		logger.fatal(" This is fatal!!!");
	}

}

这个，在eclipse里面没效果。在Linux里面才有效果。

jcabi  jar包下载：

http://download.csdn.net/detail/hardwin/4633978