控制台输出：

Hibernate: insert into girl (age, cup_size) values (?, ?)

2017-12-12 16:29:49.727  WARN 3576 --- [nio-8080-exec-5] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 1364, SQLState: HY000

2017-12-12 16:29:49.727 ERROR 3576 --- [nio-8080-exec-5] o.h.engine.jdbc.spi.SqlExceptionHelper   : Field 'id' doesn't have a default value

2017-12-12 16:29:49.731 ERROR 3576 --- [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not execute statement; nested exception is org.hibernate.exception.GenericJDBCException: could not execute statement] with root cause

java.sql.SQLException: Field 'id' doesn't have a default value

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964) ~[mysql-connector-java-5.1.44.jar:5.1.44]