今天我们尝试Spring Boot整合Kotlin,并决定建立一个非常简单的Spring Boot微服务,使用Kotlin作为编程语言进行编码构建。

成都创新互联是一家集网站建设,顺河企业网站建设,顺河品牌网站建设,网站定制,顺河网站建设报价,网络营销,网络优化,顺河网站推广为一体的创新建站企业,帮助传统企业提升企业形象加强企业竞争力。可充分满足这一群体相比中小企业更为丰富、高端、多元的互联网需求。同时我们时刻保持专业、时尚、前沿,时刻以成就客户成长自我,坚持不断学习、思考、沉淀、净化自己,让我们为更多的企业打造出实用型网站。
创建一个简单的Spring Boot应用程序。我会在这里使用maven构建项目:
<?xml version="1.0" encoding="UTF-8"?>4.0.0 com.edurt.ski springboot-kotlin-integration 1.0.0 jar springboot kotlin integration SpringBoot Kotlin Integration is a open source springboot, kotlin integration example. org.springframework.boot spring-boot-starter-parent 2.1.3.RELEASE UTF-8 UTF-8 1.8 1.2.71 org.springframework.boot spring-boot-starter-web com.fasterxml.jackson.module jackson-module-kotlin org.jetbrains.kotlin kotlin-stdlib-jdk8 org.jetbrains.kotlin kotlin-reflect ${project.basedir}/src/main/kotlin ${project.basedir}/src/test/kotlin org.springframework.boot spring-boot-maven-plugin kotlin-maven-plugin org.jetbrains.kotlin -Xjsr305=strict spring jpa all-open org.jetbrains.kotlin kotlin-maven-allopen ${plugin.maven.kotlin.version} org.jetbrains.kotlin kotlin-maven-noarg ${plugin.maven.kotlin.version} kapt kapt src/main/kotlin org.springframework.boot spring-boot-configuration-processor ${project.parent.version}
添加所有必需的依赖项:
一个简单的应用类:
package com.edurt.ski import org.springframework.boot.autoconfigure.SpringBootApplication import org.springframework.boot.runApplication @SpringBootApplication class SpringBootKotlinIntegration fun main(args: Array) { runApplication (*args) }
添加Rest API接口功能
创建一个HelloController Rest API接口,我们只提供一个简单的get请求获取hello,kotlin输出信息:
package com.edurt.ski.controller
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.RestController
@RestController
class HelloController {
@GetMapping(value = "hello")
fun hello(): String {
return "hello,kotlin"
}
}
修改SpringBootKotlinIntegration文件增加以下设置扫描路径
@ComponentScan(value = [ "com.edurt.ski", "com.edurt.ski.controller" ])
添加页面功能
修改pom.xml文件增加以下页面依赖
org.springframework.boot spring-boot-starter-mustache
在src/main/resources路径下创建templates文件夹
在templates文件夹下创建一个名为hello.mustache的页面文件
Hello, Kotlin
创建页面转换器HelloView
package com.edurt.ski.view
import org.springframework.stereotype.Controller
import org.springframework.ui.Model
import org.springframework.web.bind.annotation.GetMapping
@Controller
class HelloView {
@GetMapping(value = "hello_view")
fun helloView(model: Model): String {
return "hello"
}
}
浏览器访问http://localhost:8080/hello_view即可看到页面内容
添加数据持久化功能
修改pom.xml文件增加以下依赖(由于测试功能我们使用h3内存数据库)
org.springframework.boot spring-boot-starter-data-jpa com.h3database h3 runtime
创建User实体
package com.edurt.ski.model
import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.Id
@Entity
//class UserModel(
// @Id
// @GeneratedValue
// private var id: Long? = 0,
// private var name: String
//)
class UserModel {
@Id
@GeneratedValue
var id: Long? = 0
get() = field
set
var name: String? = null
get() = field
set
}创建UserSupport dao数据库操作工具类
package com.edurt.ski.support import com.edurt.ski.model.UserModel import org.springframework.data.repository.PagingAndSortingRepository interface UserSupport : PagingAndSortingRepository{ }
创建UserService服务类
package com.edurt.ski.service
import com.edurt.ski.model.UserModel
interface UserService {
/**
* save model to db
*/
fun save(model: UserModel): UserModel
}
创建UserServiceImpl实现类
package com.edurt.ski.service
import com.edurt.ski.model.UserModel
import com.edurt.ski.support.UserSupport
import org.springframework.stereotype.Service
@Service(value = "userService")
class UserServiceImpl(private val userSupport: UserSupport) : UserService {
override fun save(model: UserModel): UserModel {
return this.userSupport.save(model)
}
}创建用户UserController进行持久化数据
package com.edurt.ski.controller
import com.edurt.ski.model.UserModel
import com.edurt.ski.service.UserService
import org.springframework.web.bind.annotation.PathVariable
import org.springframework.web.bind.annotation.PostMapping
import org.springframework.web.bind.annotation.RequestMapping
import org.springframework.web.bind.annotation.RestController
@RestController
@RequestMapping(value = "user")
class UserController(private val userService: UserService) {
@PostMapping(value = "save/{name}")
fun save(@PathVariable name: String): UserModel {
val userModel = UserModel()
// userModel.id = 1
userModel.name = name
return this.userService.save(userModel)
}
}
使用控制台窗口执行以下命令保存数据
curl -X POST http://localhost:8080/user/save/qianmoQ
收到返回结果
{"id":1,"name":"qianmoQ"}
表示数据保存成功
增加数据读取渲染功能
修改UserService增加以下代码
/** * get all model */ fun getAll(page: Pageable): Page
修改UserServiceImpl增加以下代码
override fun getAll(page: Pageable): Page{ return this.userSupport.findAll(page) }
修改UserController增加以下代码
@GetMapping(value = "list") fun get(): Page= this.userService.getAll(PageRequest(0, 10))
创建UserView文件渲染User数据
package com.edurt.ski.view
import com.edurt.ski.service.UserService
import org.springframework.data.domain.PageRequest
import org.springframework.stereotype.Controller
import org.springframework.ui.Model
import org.springframework.ui.set
import org.springframework.web.bind.annotation.GetMapping
@Controller
class UserView(private val userService: UserService) {
@GetMapping(value = "user_view")
fun helloView(model: Model): String {
model["users"] = this.userService.getAll(PageRequest(0, 10))
return "user"
}
}创建user.mustache文件渲染数据(自行解析返回数据即可)
{{users}}浏览器访问http://localhost:8080/user_view即可看到页面内容
增加单元功能
修改pom.xml文件增加以下依赖
org.springframework.boot spring-boot-starter-test test junit junit org.mockito mockito-core org.junit.jupiter junit-jupiter-engine test
创建UserServiceTest文件进行测试UserService功能
package com.edurt.ski
import com.edurt.ski.service.UserService
import org.junit.jupiter.api.AfterAll
import org.junit.jupiter.api.Test
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.context.SpringBootTest
import org.springframework.data.domain.PageRequest
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class UserServiceTest(@Autowired private val userService: UserService) {
@Test
fun `get all`() {
println(">> Assert blog page title, content and status code")
val entity = this.userService.getAll(PageRequest(0, 1))
print(entity.totalPages)
}
}
源码地址:GitHub
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持创新互联。