错误情况
maven工程时，一直提示junit错误，仔细查看，发现有junit包，但是仍然没起作用，pom.xml加上了版本信息，还是不行，感觉为包错误，浏览包类，打开提示 “invalid LOC header (bad signature)”，感觉下载的junit包出问题。
解决手段
删除本地repository 中junit 包，重新run install，更新工程，无错误。
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------< com.iluwatar:abstract-factory >--------------------
[INFO] Building abstract-factory 1.18.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-checkstyle-plugin:2.17:check (validate) @ abstract-factory ---
[INFO] Starting audit...
Audit done.
[INFO]
[INFO] --- jacoco-maven-plugin:0.7.2.201409121644:prepare-agent (prepare-agent) @ abstract-factory ---
[INFO] argLine set to -javaagent:D:\\maven\\repository\\org\\jacoco\\org.jacoco.agent\\0.7.2.201409121644\\org.jacoco.agent-0.7.2.201409121644-runtime.jar=destfile=C:\\Users\\livingbody\\Desktop\\pdf\\java-design-patterns\\abstract-factory\\target\\jacoco.exec
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ abstract-factory ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.0:compile (default-compile) @ abstract-factory ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- urm-maven-plugin:1.4.4:map (default) @ abstract-factory ---
[INFO] Skip configured (in pom.xml) for current project "abstract-factory". Plugin will not be executed!
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ abstract-factory ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.0:testCompile (default-testCompile) @ abstract-factory ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ abstract-factory ---
[INFO] Surefire report directory: C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\target\surefire-reports
[INFO] Using configured provider org.apache.maven.surefire.junitcore.JUnitCoreProvider
[INFO] parallel='none', perCoreThreadCount=true, threadCount=0, useUnlimitedThreads=false, threadCountSuites=0, threadCountClasses=0, threadCountMethods=0, parallelOptimized=true
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running com.iluwatar.abstractfactory.AbstractFactoryTest
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec - in com.iluwatar.abstractfactory.AbstractFactoryTest
Running com.iluwatar.abstractfactory.AppTest
17:30:29.629 [main] INFO com.iluwatar.abstractfactory.App - Elf Kingdom
17:30:29.653 [main] INFO com.iluwatar.abstractfactory.App - This is the Elven Army!
17:30:29.653 [main] INFO com.iluwatar.abstractfactory.App - This is the Elven castle!
17:30:29.654 [main] INFO com.iluwatar.abstractfactory.App - This is the Elven king!
17:30:29.654 [main] INFO com.iluwatar.abstractfactory.App - Orc Kingdom
17:30:29.654 [main] INFO com.iluwatar.abstractfactory.App - This is the Orc Army!
17:30:29.654 [main] INFO com.iluwatar.abstractfactory.App - This is the Orc castle!
17:30:29.654 [main] INFO com.iluwatar.abstractfactory.App - This is the Orc king!
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec - in com.iluwatar.abstractfactory.AppTest
Results :
Tests run: 6, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ abstract-factory ---
[INFO] Building jar: C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\target\abstract-factory-1.18.0-SNAPSHOT.jar
[INFO]
[INFO] >>> maven-pmd-plugin:3.6:check (default) > :pmd @ abstract-factory >>>
[INFO]
[INFO] --- maven-pmd-plugin:3.6:pmd (pmd) @ abstract-factory ---
[WARNING] Unable to locate Source XRef to link to - DISABLED
[INFO]
[INFO] <<< maven-pmd-plugin:3.6:check (default) < :pmd @ abstract-factory <<<
[INFO]
[INFO]
[INFO] --- maven-pmd-plugin:3.6:check (default) @ abstract-factory ---
[INFO]
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ abstract-factory ---
[INFO] Installing C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\target\abstract-factory-1.18.0-SNAPSHOT.jar to D:\maven\repository\com\iluwatar\abstract-factory\1.18.0-SNAPSHOT\abstract-factory-1.18.0-SNAPSHOT.jar
[INFO] Installing C:\Users\livingbody\Desktop\pdf\java-design-patterns\abstract-factory\pom.xml to D:\maven\repository\com\iluwatar\abstract-factory\1.18.0-SNAPSHOT\abstract-factory-1.18.0-SNAPSHOT.pom
[INFO]
[INFO] --- license-maven-plugin:2.11:format (install-format) @ abstract-factory ---
[INFO] Updating license headers...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 8.053 s
[INFO] Finished at: 2018-12-12T17:30:31+08:00
[INFO] ------------------------------------------------------------------------