log4j学习笔记（二）

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二、通过配置文件输出日志

1.配置log4j.xml

2.创建应用类log4jtest.LogTest_Config.java

package log4jtest;

import org.apache.log4j.Logger;
import org.apache.log4j.xml.DOMConfigurator;

public class LogTest_Config {

	public static Logger log = Logger.getLogger(LogTest_Config.class);

	public static void main(String[] args) {
		DOMConfigurator.configure("conf/log4j.xml");

		log.debug("debug:");
		log.info("info:");
		log.warn("warn:");
		log.error("error:");
		log.fatal("fatal:");

	}
}

  创建应用类pkg1.AAA.java

package pkg1;

import org.apache.log4j.Logger;
import org.apache.log4j.xml.DOMConfigurator;

public class AAA {

	public static Logger log = Logger.getLogger(AAA.class);

	public static void main(String[] args) {
		DOMConfigurator.configure("conf/log4j.xml");

		log.debug("debug:");
		log.info("info:");
		log.warn("warn:");
		log.error("error:");
		log.fatal("fatal:");

	}
}

• log4j.jar (349.7 KB)
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