maven打的jars项目，log4j不会输出日志

通过maven打完包，运行jars时，会输出警告

log4j:WARN No appenders could be found for logger (com.dlht.DataCenterSYNC.opt.App).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

将jars包解压后，确实发现包中并没有我写的log4j.xml

网上查了一下

http://stackoverflow.com/questions/27250001/maven-log4j-no-appenders-could-be-found-for-logger

需要在pom.xml中配置resources。配置后，解压发现即会有log4j，运行jars，日志也可成功输出。  我的配置文件如下 ，标红的即是resources（注意配置的是资源路径，只要是需要打包的资源理论上都要扔到resources目录中）

<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.dlht</groupId>
	<artifactId>DataCenterSYNC</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>DataCenterSYNC</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>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.28</version>
		</dependency>
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.4.2</version>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.16</version>
		</dependency>
		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1.2</version>
		</dependency>
		<dependency>
			<groupId>commons-cli</groupId>
			<artifactId>commons-cli</artifactId>
			<version>1.3.1</version>
		</dependency>
	</dependencies>

	<build>
		<finalName>DataCenerSync</finalName>
		<resources>
			<resource>
				<directory>src/main/java</directory>
			</resource>
		</resources>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-resources-plugin</artifactId>
				<version>2.5</version>
				<configuration>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>

			<plugin>
				<groupId> org.apache.maven.plugins</groupId>
				<artifactId> maven-shade-plugin</artifactId>
				<version>2.3</version>
				<executions>
					<execution>
						<phase>package</phase>
						<goals>
							<goal>shade</goal>
						</goals>
						<configuration>
							<transformers>
								<transformer
									implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
									<mainClass>com.dlht.DataCenterSYNC.opt.App</mainClass>  <!--这里运行类！ -->
								</transformer>
							</transformers>
						</configuration>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

</project>