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建立普通JAVA工程导入外部JAR包

jar包生成和使用package讲解

下载Maven3.6.3：http://maven.apache.org/download.cgi解压zip包并置于某个目录，如放置在 “~/” 目录下Ensure JAVA_HOME environment variable is set and points to your JDK installation打开terminel输入以下命令打开.bash_profile文件：vim ~/.bash_profileAdd the bin directory of the created dire.

log4j.rootLogger = INFO, Consolelog4j.appender.Console = org.apache.log4j.ConsoleAppenderlog4j.appender.Console.layout = org.apache.log4j.PatternLayoutlog4j.appender.Console.layout.ConversionPatte...