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。
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：
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<?xml version= "1.0" encoding= "utf-8" ?> <project xmlns:xsi= "http://HdhCmsTestw3.org/2001/xmlschema-instance" xmlns= "http://maven.apache.org/pom/4.0.0" xsi:schemalocation= "http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" >
<modelversion> 4.0 . 0 </modelversion>
<groupid>com.edurt.ski</groupid> <artifactid>springboot-kotlin-integration</artifactid> <version> 1.0 . 0 </version> <packaging>jar</packaging>
<name>springboot kotlin integration</name> <description>springboot kotlin integration is a open source springboot, kotlin integration example.</description>
<parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-parent</artifactid> <version> 2.1 . 3 .release</version> <relativepath/> <!-- lookup parent from repository --> </parent>
<properties> <project.build.sourceencoding>utf- 8 </project.build.sourceencoding> <project.reporting.outputencoding>utf- 8 </project.reporting.outputencoding> <java.version> 1.8 </java.version> <!-- plugin config --> <plugin.maven.kotlin.version> 1.2 . 71 </plugin.maven.kotlin.version> </properties>
<dependencies> <!-- spring boot --> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-web</artifactid> </dependency> <!-- kotlin --> <dependency> <groupid>com.fasterxml.jackson.module</groupid> <artifactid>jackson-module-kotlin</artifactid> </dependency> <dependency> <groupid>org.jetbrains.kotlin</groupid> <artifactid>kotlin-stdlib-jdk8</artifactid> </dependency> <dependency> <groupid>org.jetbrains.kotlin</groupid> <artifactid>kotlin-reflect</artifactid> </dependency> </dependencies>
<build> <sourcedirectory>${project.basedir}/src/main/kotlin</sourcedirectory> <testsourcedirectory>${project.basedir}/src/test/kotlin</testsourcedirectory> <plugins> <plugin> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-maven-plugin</artifactid> </plugin> <plugin> <artifactid>kotlin-maven-plugin</artifactid> <groupid>org.jetbrains.kotlin</groupid> <configuration> <args> <arg>-xjsr305=strict</arg> </args> <compilerplugins> <plugin>spring</plugin> <plugin>jpa</plugin> <plugin>all-open</plugin> </compilerplugins> <pluginoptions> <option>all-open:annotation=javax.persistence.entity</option> </pluginoptions> </configuration> <dependencies> <dependency> <groupid>org.jetbrains.kotlin</groupid> <artifactid>kotlin-maven-allopen</artifactid> <version>${plugin.maven.kotlin.version}</version> </dependency> <dependency> <groupid>org.jetbrains.kotlin</groupid> <artifactid>kotlin-maven-noarg</artifactid> <version>${plugin.maven.kotlin.version}</version> </dependency> </dependencies> <executions> <execution> <id>kapt</id> <goals> <goal>kapt</goal> </goals> <configuration> <sourcedirs> <sourcedir>src/main/kotlin</sourcedir> </sourcedirs> <annotationprocessorpaths> <annotationprocessorpath> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-configuration-processor</artifactid> <version>${project.parent.version}</version> </annotationprocessorpath> </annotationprocessorpaths> </configuration> </execution> </executions> </plugin> </plugins> </build>
</project> |
添加所有必需的依赖项：
kotlin-stdlib-jdk8 kotlin jdk8的lib包 kotlin-reflect kotlin反射包一个简单的应用类：
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package com.edurt.ski
import org.springframework.boot.autoconfigure.springbootapplication import org.springframework.boot.runapplication
@springbootapplication class springbootkotlinintegration
fun main(args: array<string>) { runapplication<springbootkotlinintegration>(*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:
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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
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@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
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<!-- mustache --> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-mustache</artifactid> </dependency> |
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
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<h1>hello, kotlin</h1> |
创建页面转换器helloview
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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h2内存数据库)
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<!-- data jpa and db --> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-data-jpa</artifactid> </dependency> <dependency> <groupid>com.h2database</groupid> <artifactid>h2</artifactid> <scope>runtime</scope> </dependency> |
创建user实体
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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
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package com.edurt.ski.support
import com.edurt.ski.model.usermodel import org.springframework.data.repository.pagingandsortingrepository
interface usersupport : pagingandsortingrepository<usermodel, long > {
} |
创建userservice服务类
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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
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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
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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
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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
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/** * get all model */ fun getall(page: pageable): page<usermodel> |
修改userserviceimpl增加以下代码
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override fun getall(page: pageable): page<usermodel> { return this .usersupport.findall(page) } |
修改usercontroller增加以下代码
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@getmapping (value = "list" ) fun get(): page<usermodel> = this .userservice.getall(pagerequest( 0 , 10 )) |
创建userview文件渲染user数据
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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)
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{{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
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<!-- test --> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-test</artifactid> <scope>test</scope> <exclusions> <exclusion> <groupid>junit</groupid> <artifactid>junit</artifactid> </exclusion> <exclusion> <groupid>org.mockito</groupid> <artifactid>mockito-core</artifactid> </exclusion> </exclusions> </dependency> <dependency> <groupid>org.junit.jupiter</groupid> <artifactid>junit-jupiter-engine</artifactid> <scope>test</scope> </dependency> |
创建userservicetest文件进行测试userservice功能
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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。
原文链接：https://segmentfault测试数据/a/1190000018224145
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