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://*.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>