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11.6 数据库实体类
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我们在上面已经完成了MySQL数据源的配置,下面我们来写一个实体类。新建package com.easy.kotlin.chapter11_kotlin_springboot.entity ,然后新建Article实体类:
package com.easy.kotlin.chapter11_kotlin_springboot.entity import java.util.* import javax.persistence.* @Entity class Article { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) var id: Long = -1 @Version var version: Long = 0 var title: String = "" var content: String = "" var author: String = "" var gmtCreated: Date = Date() var gmtModified: Date = Date() var isDeleted: Int = 0 //1 Yes 0 No var deletedDate: Date = Date() override fun toString(): String { return "Article(id=$id, version=$version, title='$title', content='$content', author='$author', gmtCreated=$gmtCreated, gmtModified=$gmtModified, isDeleted=$isDeleted, deletedDate=$deletedDate)" } }
类似的实体类,我们在Java中需要生成一堆getter/setter方法;如果我们用Scala写还需要加个 注解@BeanProperty, 例如
package com.springboot.in.action.entity import java.util.Date import javax.persistence.{ Entity, GeneratedValue, GenerationType, Id } import scala.language.implicitConversions import scala.beans.BeanProperty @Entity class HttpApi { @Id @GeneratedValue(strategy = GenerationType.AUTO) @BeanProperty var id: Integer = _ @BeanProperty var httpSuiteId: Integer = _ //用例名称 @BeanProperty var name: String = _ //用例状态: -1未执行 0失败 1成功 @BeanProperty var state: Integer = _ ... }
我们这个是一个博客文章的简单实体类。再次重启运行应用,我们去MySQL的Schema: blog 里面去看,发现数据库自动生成了 Table: article , 它的表字段信息如下:
Field Type Null Key Default Extra id bigint(20) NO PRI NULL auto_increment author varchar(255) YES NULL content varchar(255) YES NULL deleted_date datetime YES NULL gmt_created datetime YES NULL gmt_modified datetime YES NULL is_deleted int(11) NO NULL title varchar(255) YES NULL version bigint(20) NO NULL - - 留下你的读书笔记
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