11.6 数据库实体类

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：