SpringBoot整合Kotlin构建Web服务的方法示例

2023-08-28 18:20:05 67

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

创建一个简单的SpringBoot应用程序。我会在这里使用maven构建项目：




4.0.0

com.edurt.ski
springboot-kotlin-integration
1.0.0
jar

springbootkotlinintegration
SpringBootKotlinIntegrationisaopensourcespringboot,kotlinintegrationexample.


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：

kotlin-stdlib-jdk8kotlinjdk8的lib包
kotlin-reflectkotlin反射包

一个简单的应用类：

packagecom.edurt.ski

importorg.springframework.boot.autoconfigure.SpringBootApplication
importorg.springframework.boot.runApplication

@SpringBootApplication
classSpringBootKotlinIntegration

funmain(args:Array){
runApplication(*args)
}

添加RestAPI接口功能

创建一个HelloControllerRestAPI接口,我们只提供一个简单的get请求获取hello,kotlin输出信息:

packagecom.edurt.ski.controller

importorg.springframework.web.bind.annotation.GetMapping
importorg.springframework.web.bind.annotation.RestController

@RestController
classHelloController{

@GetMapping(value="hello")
funhello():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

packagecom.edurt.ski.view

importorg.springframework.stereotype.Controller
importorg.springframework.ui.Model
importorg.springframework.web.bind.annotation.GetMapping

@Controller
classHelloView{

@GetMapping(value="hello_view")
funhelloView(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h2内存数据库)



org.springframework.boot
spring-boot-starter-data-jpa


com.h2database
h2
runtime

创建User实体

packagecom.edurt.ski.model

importjavax.persistence.Entity
importjavax.persistence.GeneratedValue
importjavax.persistence.Id

@Entity
//classUserModel(
//@Id
//@GeneratedValue
//privatevarid:Long?=0,
//privatevarname:String
//)
classUserModel{

@Id
@GeneratedValue
varid:Long?=0
get()=field
set

varname:String?=null
get()=field
set

}

创建UserSupportdao数据库操作工具类

packagecom.edurt.ski.support

importcom.edurt.ski.model.UserModel
importorg.springframework.data.repository.PagingAndSortingRepository

interfaceUserSupport:PagingAndSortingRepository{

}

创建UserService服务类

packagecom.edurt.ski.service

importcom.edurt.ski.model.UserModel

interfaceUserService{

/**
*savemodeltodb
*/
funsave(model:UserModel):UserModel

}

创建UserServiceImpl实现类

packagecom.edurt.ski.service

importcom.edurt.ski.model.UserModel
importcom.edurt.ski.support.UserSupport
importorg.springframework.stereotype.Service

@Service(value="userService")
classUserServiceImpl(privatevaluserSupport:UserSupport):UserService{

overridefunsave(model:UserModel):UserModel{
returnthis.userSupport.save(model)
}

}

创建用户UserController进行持久化数据

packagecom.edurt.ski.controller

importcom.edurt.ski.model.UserModel
importcom.edurt.ski.service.UserService
importorg.springframework.web.bind.annotation.PathVariable
importorg.springframework.web.bind.annotation.PostMapping
importorg.springframework.web.bind.annotation.RequestMapping
importorg.springframework.web.bind.annotation.RestController

@RestController
@RequestMapping(value="user")
classUserController(privatevaluserService:UserService){

@PostMapping(value="save/{name}")
funsave(@PathVariablename:String):UserModel{
valuserModel=UserModel()
//userModel.id=1
userModel.name=name
returnthis.userService.save(userModel)
}

}

使用控制台窗口执行以下命令保存数据

curl-XPOSThttp://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

/**
*getallmodel
*/
fungetAll(page:Pageable):Page

修改UserServiceImpl增加以下代码

overridefungetAll(page:Pageable):Page{
returnthis.userSupport.findAll(page)
}

修改UserController增加以下代码

@GetMapping(value="list")
funget():Page=this.userService.getAll(PageRequest(0,10))

创建UserView文件渲染User数据

packagecom.edurt.ski.view

importcom.edurt.ski.service.UserService
importorg.springframework.data.domain.PageRequest
importorg.springframework.stereotype.Controller
importorg.springframework.ui.Model
importorg.springframework.ui.set
importorg.springframework.web.bind.annotation.GetMapping

@Controller
classUserView(privatevaluserService:UserService){

@GetMapping(value="user_view")
funhelloView(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

packagecom.edurt.ski

importcom.edurt.ski.service.UserService
importorg.junit.jupiter.api.AfterAll
importorg.junit.jupiter.api.Test
importorg.springframework.beans.factory.annotation.Autowired
importorg.springframework.boot.test.context.SpringBootTest
importorg.springframework.data.domain.PageRequest

@SpringBootTest(webEnvironment=SpringBootTest.WebEnvironment.RANDOM_PORT)
classUserServiceTest(@AutowiredprivatevaluserService:UserService){

@Test
fun`getall`(){
println(">>Assertblogpagetitle,contentandstatuscode")
valentity=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毛票票。

SpringBoot整合Kotlin构建Web服务的方法示例

Hello,Kotlin

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