"C:\Program Files\Java\jdk1.8.0_171\bin\java.exe" -Dmaven.multiModuleProjectDirectory=E:\IDEA\mmall "-Dmaven.home=E:\IDEA\IntelliJ IDEA 2018.1.5\plugins\maven\lib\maven3" "-Dclassworlds.conf=E:\IDEA\IntelliJ IDEA 2018.1.5\plugins\maven\lib\maven3\bin\m2.conf" "-javaagent:E:\IDEA\IntelliJ IDEA 2018.1.5\lib\idea_rt.jar=53876:E:\IDEA\IntelliJ IDEA 2018.1.5\bin" -Dfile.encoding=UTF-8 -classpath "E:\IDEA\IntelliJ IDEA 2018.1.5\plugins\maven\lib\maven3\boot\plexus-classworlds-2.5.2.jar" org.codehaus.classworlds.Launcher -Didea.version=2018.1.5 org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate -f pom.xml
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com:mmall:war:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 266, column 15
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building mmall Maven Webapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- mybatis-generator-maven-plugin:1.3.2:generate (default-cli) @ mmall ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.514 s
[INFO] Finished at: 2018-10-25T12:22:38+08:00
[INFO] Final Memory: 9M/113M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate (default-cli) on project mmall: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate failed: Cannot resolve classpath entry: C:\Users\Administrator.m2\repository\mysql\mysql-connector-java\8.0.12\mysql-connector-java-8.0.12.jar -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

Process finished with exit code 1

报错如上，datasource.properties写的是数据库的属性配置

db.driverLocation=C:\\Users\\Administrator\这里的斜杠漏了转义字符，运行时无法读取斜杠.m2\\repository\\mysql\\mysql-connector-java\\8.0.12\\mysql-connector-java-8.0.12.jar
db.driverClassName=com.mysql.cj.jdbc.Driver

应该为：

db.driverLocation=C:\\Users\\Administrator\\.m2\\repository\\mysql\\mysql-connector-java\\8.0.12\\mysql-connector-java-8.0.12.jar
db.driverClassName=com.mysql.cj.jdbc.Driver