Scala代码开发 metaTable(元表)

使用Scala语言开发时，自动生成get和set方法

不用写return进行返回， 因为它的最后一行就是返回值

先建立四个层(层层递进)

domain 表结构的建立

repository(DAO) 实现接口层

service 实现业务层

controller 实现控制层

domain层开发

MetaTable.scala

package com.imooc.imoocbootscala.domain

import javax.persistence.{Entity, GeneratedValue, Id, Table}

import scala.beans.BeanProperty

/**
  * 使用Scala语言开发时，自动生成get和set方法
  * 不用写return进行返回， 因为它的最后一行就是返回值
  */
@Entity
@Table
class MetaTable {

  @Id
  @GeneratedValue
  @BeanProperty
  var id:Integer =  _

  @BeanProperty
  var name:String = _

  @BeanProperty
  var tableType:String = _

  @BeanProperty
  var dbId:Integer = _
}

repository层开发

MetaTableRepository.scala

package com.imooc.imoocbootscala.repository

import com.imooc.imoocbootscala.domain.MetaTable
import org.springframework.data.repository.CrudRepository

trait MetaTableRepository extends CrudRepository[MetaTable, Integer]{

}

serive层开发

MetaTableService.scala

package com.imooc.imoocbootscala.service

import com.imooc.imoocbootscala.domain.MetaTable
import com.imooc.imoocbootscala.repository.MetaTableRepository
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Service
import org.springframework.transaction.annotation.Transactional

/**
  *
  * 注意，导入的注解包和java的完全不一样
  */
@Service
class MetaTableService @Autowired()(metaTableRepository: MetaTableRepository){

  @Transactional  //事务
  def save(metaTable:MetaTable)= {
    metaTableRepository.save(metaTable)
  }

  def query() = {
    metaTableRepository.findAll()
  }

}

controller层开发

MetaTableController.scala

package com.imooc.imoocbootscala.controller

import com.imooc.imoocbootscala.domain.MetaTable
import com.imooc.imoocbootscala.service.MetaTableService
import com.imooc.imoocbootscala.utils.ResultVOUtil
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.web.bind.annotation._

@RestController
@RequestMapping(Array("/meta/table"))
class MetaTableController @Autowired()(metaTableService: MetaTableService){

  @RequestMapping(value = Array("/"), method = Array(RequestMethod.POST))
  @ResponseBody
  def save(@ModelAttribute metaTable:MetaTable) = {
    metaTableService.save(metaTable)
    ResultVOUtil.success()  //  此处就是Scala调用已有的Java代码
  }

  @RequestMapping(value = Array("/"), method = Array(RequestMethod.GET))
  @RequestBody
  def query() = {
    ResultVOUtil.success(metaTableService.query())
  }

}

属性值:

application.yml

server:
  port: 7777
  context-path: /scala-boot
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/bootscala?useSSL=false
  jpa:
    hibernate:
      ddl-auto: update
    database: mysql

功能测试:

运行代码,在控制台查看,是否运行成功
在IDEA控制台查看信息:


去终端中的mysql下查看信息:


用postman软件,进行测试:

save()方法的测试:


query()方法的测试: