Spring中使用Log4j记录日志

以下内容引用自http://wiki.jikexueyuan.com/project/spring/logging-with-log4j.html：

例子：

pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.jsoft.testspring</groupId><artifactId>testlog4juse</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>testlog4juse</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency><!-- Spring Core --><!-- http://mvnrepository.com/artifact/org.springframework/spring-core --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.1.4.RELEASE</version></dependency><!-- Spring Context --><!-- http://mvnrepository.com/artifact/org.springframework/spring-context --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.1.4.RELEASE</version></dependency><!-- Log4j --><!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core --><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-core</artifactId><version>2.1</version></dependency></dependencies>
</project>

HelloWorld.java：

package com.jsoft.testspring.testlog4juse;public class HelloWorld {private String message;public void setMessage(String message) {this.message = message;}public void getMessage() {System.out.println("Your Message : " + message);}
}

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- 配置参考：http://blog.csdn.net/seven_zhao/article/details/42124131 -->
<!-- status="OFF"，可以去掉，它的含义为是否记录log4j2本身的event信息，默认是OFF -->
<configuration status="OFF"><!-- 定义下面的引用名 --><Properties><property name="log_pattern">%d{yyyy-MM-ddHH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n</property><property name="basePath">c:/</property><property name="file_name">${basePath}/applog/app.log</property><property name="rolling_file_name">${basePath}/applog/app-%d{yyyy-MM-dd}-%i.log.gz</property><property name="every_file_size">10M</property><!-- 日志切割的最小单位 --><property name="output_log_level">debug</property><!-- 日志输出级别 --></Properties><!--先定义所有的appender--><appenders><!--这个输出控制台的配置--><Console name="Console" target="SYSTEM_OUT"><!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch）--><ThresholdFilter level="trace" onMatch="ACCEPT" onMismatch="DENY"/><!--这个都知道是输出日志的格式--><PatternLayout pattern="${log_pattern}"/></Console><!--这个会打印出所有的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档--><!-- 按月生成归档日志，可以使用filePattern="logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"--><RollingFile name="RollingFile" fileName="${file_name}" filePattern="${rolling_file_name}"><PatternLayout pattern="${log_pattern}"/><SizeBasedTriggeringPolicy size="${every_file_size}"/></RollingFile><!--如果需要配置多个Rollingfile地址，还需要在root下添加appender-ref ref="RollingFile1"/> <RollingFile name="RollingFile1" fileName="logs/app1.log" filePattern="logs/app1-%d{yyyy-MM-dd}-%i.log.gz"><PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss z}%-5level %class{36} %L %M - %msg%xEx%n"/><SizeBasedTriggeringPolicy size="10MB"/></RollingFile>--></appenders><!--然后定义logger，只有定义了logger并引入的appender，appender才会生效--><loggers><!--建立一个默认的root的logger，需要在root的level中指定输出的级别，--><root level="${output_log_level}"><appender-ref ref="RollingFile"/><appender-ref ref="Console"/></root></loggers>
</configuration>

beans.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="helloWorld" class="com.jsoft.testspring.testlog4juse.HelloWorld"><property name="message" value="Hello World!" /></bean></beans>

App.java：

package com.jsoft.testspring.testlog4juse;import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.core.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** Hello world!**/
public class App {static Logger log = (Logger) LogManager.getLogger(App.class.getName());public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");log.info("Going to create HelloWord Obj");HelloWorld obj = (HelloWorld) context.getBean("helloWorld");obj.getMessage();log.info("Exiting the program");}
}

测试结果：

测试工程：https://github.com/easonjim/5_java_example/tree/master/springtest/test20/testlog4juse