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Spring Boot與Kotlin處理Web表單提交的方法

更新時間：2018年01月22日 11:02:53 作者：quanke

本篇文章主要介紹了Spring Boot 與 Kotlin 處理Web表單提交的方法，小編覺得挺不錯的，現(xiàn)在分享給大家，也給大家做個參考。一起跟隨小編過來看看吧

我們在做web開發(fā)的時候，肯定逃不過表單提交，這篇文章通過Spring Boot使用Kotlin 語言創(chuàng)建和提交一個表單。

下面我們在之前《Spring Boot 與 Kotlin使用Freemarker模板引擎渲染web視圖》項(xiàng)目的基礎(chǔ)上，增加處理表單提交。

build.gradle 文件沒有變化，這里貼一下完整的build.gradle

group 'name.quanke.kotlin'
version '1.0-SNAPSHOT'

buildscript {
  ext.kotlin_version = '1.2.10'
  ext.spring_boot_version = '1.5.4.RELEASE'
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath("org.springframework.boot:spring-boot-gradle-plugin:$spring_boot_version")

//    Kotlin整合SpringBoot的默認(rèn)無參構(gòu)造函數(shù)，默認(rèn)把所有的類設(shè)置open類插件
    classpath("org.jetbrains.kotlin:kotlin-noarg:$kotlin_version")
    classpath("org.jetbrains.kotlin:kotlin-allopen:$kotlin_version")
  }
}

apply plugin: 'kotlin'
apply plugin: "kotlin-spring" // See https://kotlinlang.org/docs/reference/compiler-plugins.html#kotlin-spring-compiler-plugin
apply plugin: 'org.springframework.boot'

jar {
  baseName = 'chapter11-5-4-service'
  version = '0.1.0'
}
repositories {
  mavenCentral()
}

dependencies {
  compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
  compile "org.springframework.boot:spring-boot-starter-web:$spring_boot_version"
  compile "org.springframework.boot:spring-boot-starter-thymeleaf:$spring_boot_version"
//  compile "com.fasterxml.jackson.module:jackson-module-kotlin:$kotlin_version"
  testCompile "org.springframework.boot:spring-boot-starter-test:$spring_boot_version"
  testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"

}

compileKotlin {
  kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
  kotlinOptions.jvmTarget = "1.8"
}

創(chuàng)建實(shí)體類Hello

/**
 * Created by http://quanke.name on 2018/1/12.
 */
data class Hello(var id: Long? = 0, var content: String? = "")

創(chuàng)建Controller

import name.quanke.kotlin.chaper11_5_4.entity.Hello
import org.springframework.stereotype.Controller
import org.springframework.ui.ModelMap
import org.springframework.web.bind.annotation.ModelAttribute
import org.springframework.web.bind.annotation.PostMapping
import org.springframework.web.bind.annotation.RequestMapping
/**
 * Created by http://quanke.name on 2018/1/10.
 */
@Controller
class HelloController {

  @RequestMapping("/")
  fun index(map: ModelMap): String {
//    / 加入一個屬性，用來在模板中讀取
    map.addAttribute("host", "http://quanke.name")
    map.addAttribute("hello",Hello())
    // return模板文件的名稱，對應(yīng)src/main/resources/templates/index.html
    return "index"
  }

  @PostMapping("/hello")
  fun helloPostSubmit(@ModelAttribute hello: Hello): String {
    return "result"
  }
}

頁面展示層

src/main/resources/templates/index.html

<!DOCTYPE html>
<html xmlns:th="http://www.w3.org/1999/xhtml">
<head lang="en">
  <title>quanke.name</title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<h1 th:text="${host}">Hello World</h1>
<h1>Form</h1>
<form action="#" th:action="@{/hello}" th:object="${hello}" method="post">
  <p>Id: <input type="text" th:field="*{id}"/></p>
  <p>Message: <input type="text" th:field="*{content}"/></p>
  <p><input type="submit" value="Submit"/> <input type="reset" value="Reset"/></p>
</form>
</body>
</html>

src/main/resources/templates/result.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
  <title>Title</title>
</head>
<body>
<h1>Result</h1>
<p th:text="'id: ' + ${hello.id}"/>
<p th:text="'content: ' + ${hello.content}"/>
<a href="/" rel="external nofollow" >Submit another message</a>
</body>
</html>

Spring Boot 啟動

import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.SpringBootApplication
/**
 * Created by http://quanke.name on 2018/1/9.
 */

@SpringBootApplication
class Application

fun main(args: Array<String>) {
  SpringApplication.run(Application::class.java, *args)
}

啟動工程，訪問ttp://localhost:8080/:

參考：https://spring.io/guides/gs/handling-form-submission/

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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