springboot结合hibernate jpa自动创建数据表

实体类一定要写对 仔细检查实体类的注解 字段类型
之前一直可以正常启动 但就是创建不了表 也不提示错误 不知道是什么原因导致自动创建表失败
先仔细检查实体类 字段类型 各个实体类之间的联系字段有没有写对
pom.xml中的依赖有没有引入
检查application-dev,yml中数据库的链接配置有没有问题

之前在 Blog.java中 这个字段的类型写错了

 @OneToMany(mappedBy = "blog")
    private Comment comments = new Comment();//一个博客对应多条评论

改成下面后

 @OneToMany(mappedBy = "blog")
    private List<Comment> commentslist = new ArrayList<>();//一个博客对应多条评论

重新生成这个字段的getter setter方法
再启动 自动创建表成功

Hibernate: create table hibernate_sequence (next_val bigint) engine=InnoDB
Hibernate: insert into hibernate_sequence values ( 1 )
Hibernate: create table t_blog (id bigint not null, appreciation bit not null, commentabled bit not null, content varchar(255), create_time datetime, first_picture varchar(255), flag varchar(255), published bit not null, recommend bit not null, share_statement bit not null, title varchar(255), update_time datetime, views integer, type_id bigint, user_id bigint, primary key (id)) engine=InnoDB
Hibernate: create table t_blog_taglist (bloglist_id bigint not null, taglist_id bigint not null) engine=InnoDB
Hibernate: create table t_comment (id bigint not null, avatar varchar(255), content varchar(255), create_time datetime, email varchar(255), nickname varchar(255), blog_id bigint, parent_comment_id bigint, primary key (id)) engine=InnoDB
Hibernate: create table t_tag (id bigint not null, tag_name varchar(255), primary key (id)) engine=InnoDB
Hibernate: create table t_type (id bigint not null, type_name varchar(255), primary key (id)) engine=InnoDB
Hibernate: create table t_user (id bigint not null, avatar varchar(255), create_time datetime, email varchar(255), nickname varchar(255), password varchar(255), type integer, update_time datetime, username varchar(255), primary key (id)) engine=InnoDB
Hibernate: alter table t_blog add constraint FK292449gwg5yf7ocdlmswv9w4j foreign key (type_id) references t_type (id)
Hibernate: alter table t_blog add constraint FK8ky5rrsxh01nkhctmo7d48p82 foreign key (user_id) references t_user (id)
Hibernate: alter table t_blog_taglist add constraint FK366s4qw9i0ys1gpp80w5pnmmx foreign key (taglist_id) references t_tag (id)
Hibernate: alter table t_blog_taglist add constraint FK6pcs7bqnv1ygvqk4l1qag3tqg foreign key (bloglist_id) references t_blog (id)
Hibernate: alter table t_comment add constraint FKke3uogd04j4jx316m1p51e05u foreign key (blog_id) references t_blog (id)
Hibernate: alter table t_comment add constraint FK4jj284r3pb7japogvo6h72q95 foreign key (parent_comment_id) references t_comment (id)