Scala代码开发 metaTable(元表)

2022-05-14 09:47:49

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