默认存在：@SpringBootApplication
1.注解@MapperScan
1 | @MapperScan("com.hachuizi.service.dao") |
如果没有，错误情况：
1 2 3 4 5 6 7 8 9 10 11 12 13 | Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2018-11-05-16:02:16.006 ERROR 42 --- [main ] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: Field userDao in com.hachuizi.service.UserService required a bean of type 'com.hachuizi.service.dao.UserDao' that could not be found. 或者 java.lang.IllegalArgumentException: At least one base package must be specified |