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
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
4.0.0 com.edurt.kvi kotlin-vertx-integration jar 1.0.0 kotlin-vertx-integration Kotlin Vertx Integration is a open source kotlin vertx integration example. 1.2.71 3.4.1 3.3 2.10.4 1.2.71 1.8 UTF-8 UTF-8 1.8 1.8 org.jetbrains.kotlin kotlin-stdlib-jdk8 ${dependency.kotlin.version} org.jetbrains.kotlin kotlin-reflect ${dependency.kotlin.version} io.vertx vertx-core ${dependency.vertx.ersion} io.vertx vertx-web ${dependency.vertx.ersion} 3.5.0 ${project.basedir}/src/main/kotlin ${project.basedir}/src/test/kotlin 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} org.apache.maven.plugins maven-compiler-plugin ${plugin.maven.compiler.version} ${environment.compile.java.version} ${environment.compile.java.version} org.apache.maven.plugins maven-javadoc-plugin ${plugin.maven.javadoc.version} true Description test description-Xdoclint:none
添加Vertx实例
- 创建CoreVerticle类文件
package com.edurt.kvi.coreimport io.vertx.core.AbstractVerticleimport io.vertx.core.Futureimport io.vertx.core.Handlerimport io.vertx.ext.web.Routerimport io.vertx.ext.web.RoutingContextclass CoreVerticle : AbstractVerticle() { override fun start(startFuture: Future ?) { 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 { req -> req.response().end("Hello Kotlin Vertx Integration!") }} - 设置启动类
package com.edurt.kviimport com.edurt.kvi.core.CoreVerticleimport io.vertx.core.Vertxclass KotlinVertxIntegrationfun main(args: Array) { 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
1.7.25 io.vertx vertx-web-templ-thymeleaf ${dependency.vertx.ersion} org.slf4j slf4j-log4j12 ${dependency.slf4j.version}
- 增加页面渲染文件
package com.edurt.kvi.routerimport io.vertx.ext.web.Routerimport io.vertx.ext.web.RoutingContextimport io.vertx.ext.web.templ.ThymeleafTemplateEngineimport org.thymeleaf.templatemode.TemplateModeclass HomeViewRouterfun 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
Kotlin Vertx Integration Welcome To Kotlin Vertx Integration!
- 修改CoreVerticle增加页面跳转
package com.edurt.kvi.coreimport com.edurt.kvi.router.indeximport io.vertx.core.AbstractVerticleimport io.vertx.core.Futureimport io.vertx.core.Handlerimport io.vertx.core.Vertximport io.vertx.core.http.HttpServerResponseimport io.vertx.ext.web.Routerimport io.vertx.ext.web.RoutingContextclass 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 { 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出现以下页面
