今天我们尝试kotlin整合vertx，并决定建立一个非常简单的web应用程序，使用Kotlin和Vertx作为编程语言进行编码构建。
生成项目
打开控制台窗口执行以下代码进行生成一个maven项目
复制代码 代码如下: mvn archetype:generate -DgroupId=com.edurt.kvi -DartifactId=kotlin-vertx-integration -DarchetypeArtifactId=maven-archetype-quickstart -Dversion=1.0.0 -DinteractiveMode=false
修改pom.xml增加java和kotlin的支持
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.edurt.kvi</groupId> <artifactId>kotlin-vertx-integration</artifactId> <packaging>jar</packaging> <version>1.0.0</version> <name>kotlin-vertx-integration</name> <description>Kotlin Vertx Integration is a open source kotlin vertx integration example.</description> <!-- properties --> <properties> <!-- dependency --> <dependency.kotlin.version>1.2.71</dependency.kotlin.version> <dependency.vertx.ersion>3.4.1</dependency.vertx.ersion> <!-- plugin --> <plugin.maven.compiler.version>3.3</plugin.maven.compiler.version> <plugin.maven.javadoc.version>2.10.4</plugin.maven.javadoc.version> <plugin.maven.kotlin.version>1.2.71</plugin.maven.kotlin.version> <!-- environment --> <environment.compile.java.version>1.8</environment.compile.java.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <jvmTarget>1.8</jvmTarget> </properties> <!-- dependencys --> <dependencies> <!-- kotlin --> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-stdlib-jdk8</artifactId> <version>${dependency.kotlin.version}</version> </dependency> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-reflect</artifactId> <version>${dependency.kotlin.version}</version> </dependency> <!-- vertx --> <dependency> <groupId>io.vertx</groupId> <artifactId>vertx-core</artifactId> <version>${dependency.vertx.ersion}</version> </dependency> <dependency> <groupId>io.vertx</groupId> <artifactId>vertx-web</artifactId> <version>${dependency.vertx.ersion}</version> </dependency> </dependencies> <!-- prerequisites --> <prerequisites> <maven>3.5.0</maven> </prerequisites> <!-- build --> <build> <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory> <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory> <plugins> <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>${project.parent.version}</version> </annotationProcessorPath> </annotationProcessorPaths> </configuration> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>${plugin.maven.compiler.version}</version> <configuration> <source>${environment.compile.java.version}</source> <target>${environment.compile.java.version}</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-javadoc-plugin</artifactId> <version>${plugin.maven.javadoc.version}</version> <configuration> <aggregate>true</aggregate> <!-- custom tags --> <tags> <tag> <name>Description</name> <placement>test</placement> <head>description</head> </tag> </tags> <!-- close jdoclint check document --> <additionalparam>-Xdoclint:none</additionalparam> </configuration> </plugin> </plugins> </build> </project>
添加Vertx实例
创建CoreVerticle类文件
package com.edurt.kvi.core
import io.vertx.core.AbstractVerticle
import io.vertx.core.Future
import io.vertx.core.Handler
import io.vertx.ext.web.Router
import io.vertx.ext.web.RoutingContext
class CoreVerticle : AbstractVerticle() {
override fun start(startFuture: Future<Void>?) {
val router = createRouter()
val port = config().getInteger("http.port", 8080)
vertx.createHttpServer()
.requestHandler { router.accept(it) }
.listen(port) { result ->
if (result.succeeded()) {
startFuture?.complete()
} else {
startFuture?.fail(result.cause())
}
}
}
private fun createRouter() = Router.router(vertx).apply {
get("/").handler(handlerRoot)
}
/**
* create router instance
*/
val handlerRoot = Handler<RoutingContext> { req ->
req.response().end("Hello Kotlin Vertx Integration!")
}
}
设置启动类
package com.edurt.kvi
import com.edurt.kvi.core.CoreVerticle
import io.vertx.core.Vertx
class KotlinVertxIntegration
fun main(args: Array<String>) {
val vertx = Vertx.vertx()
vertx.deployVerticle(CoreVerticle::class.java.name)
}
以上操作在vertx.deployVerticle阶段执行了部署Verticle的操作，即部署CoreVerticle。
启动应用后浏览器访问http://localhost:8080出现以下页面
增加页面渲染功能
修改pom.xml文件增加页面依赖
<dependency.slf4j.version>1.7.25</dependency.slf4j.version>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-web-templ-thymeleaf</artifactId>
<version>${dependency.vertx.ersion}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${dependency.slf4j.version}</version>
</dependency>
增加页面渲染文件
package com.edurt.kvi.router
import io.vertx.ext.web.Router
import io.vertx.ext.web.RoutingContext
import io.vertx.ext.web.templ.ThymeleafTemplateEngine
import org.thymeleaf.templatemode.TemplateMode
class HomeViewRouter
fun index(r: Router) {
val engine = ThymeleafTemplateEngine.create().setMode(TemplateMode.HTML)
r.get("/index.html").handler { c ->
render(c, engine, "templates/index.html")
}
}
fun render(c: RoutingContext, engine: ThymeleafTemplateEngine, templ: String) {
engine.render(c, templ) { res ->
if (res.succeeded()) {
c.response().end(res.result())
} else {
c.fail(res.cause())
}
}
}
在templates/index.html目录下创建页面文件
<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-4.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Kotlin Vertx Integration</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> </head> <body> <p>Welcome To Kotlin Vertx Integration!</p> </body> </html>
修改CoreVerticle增加页面跳转
package com.edurt.kvi.core
import com.edurt.kvi.router.index
import io.vertx.core.AbstractVerticle
import io.vertx.core.Future
import io.vertx.core.Handler
import io.vertx.core.Vertx
import io.vertx.core.http.HttpServerResponse
import io.vertx.ext.web.Router
import io.vertx.ext.web.RoutingContext
class CoreVerticle : AbstractVerticle() {
override fun start() {
val router = createRouter(vertx)
// go to index page
index(router)
vertx.createHttpServer().requestHandler { handler -> router.accept(handler) }.listen(8080)
// val port = config().getInteger("http.port", 8080)
// vertx.createHttpServer()
// .requestHandler { router.accept(it) }
// .listen(port) { result ->
// if (result.succeeded()) {
// startFuture?.complete()
// } else {
// startFuture?.fail(result.cause())
// }
// }
}
private fun createRouter() = Router.router(vertx).apply {
get("/").handler(handlerRoot)
}
/**
* create router instance
*/
val handlerRoot = Handler<RoutingContext> { req ->
req.response().end("Hello Kotlin Vertx Integration!")
}
fun createRouter(v: Vertx): Router {
var router = Router.router(v)
router.route("/").handler { c -> c.response().end("Hello Kotlin Vertx Integration!") }
router.route("/index").handler { c -> c.response().html().end("Hello Kotlin Vertx Integration Page!") }
return router
}
fun HttpServerResponse.html(): HttpServerResponse {
return this.putHeader("content-type", "text/html")
}
}
启动应用后浏览器访问http://localhost:8080/index.html出现以下页面
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华域联盟。
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