更新RM

xxl-job-admin/src/main/resources/jdbc.properties

 c3p0.driverClass=com.mysql.jdbc.Driver
-c3p0.url=jdbc:mysql://localhost:3306/xxl-job?Unicode=true&characterEncoding=UTF-8
+c3p0.url=jdbc:mysql://localhost:3306/xxl-job?useUnicode=true&characterEncoding=UTF-8
 c3p0.user=root
 c3p0.password=root_pwd
\ No newline at end of file

xxl-job-executor-example/src/main/resources/jdbc.properties

 c3p0.driverClass=com.mysql.jdbc.Driver
-c3p0.url=jdbc:mysql://localhost:3306/xxl-job?Unicode=true&characterEncoding=UTF-8
+c3p0.url=jdbc:mysql://localhost:3306/xxl-job?useUnicode=true&characterEncoding=UTF-8
 c3p0.user=root
 c3p0.password=root_pwd
\ No newline at end of file