■ サンプル
スターター
HelloWorldApplication.java
package com.sample;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableAutoConfiguration
@ComponentScan
public class HelloWorldApplication {
public static void main(String[] args) {
SpringApplication.run(HelloWorldApplication.class, args);
}
}
コントローラ側
HelloWorldController.java
package com.sample.controllers;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.sample.forms.HelloForm;
@Controller
@EnableAutoConfiguration
public class HelloWorldController {
@RequestMapping(value = "/", method = {RequestMethod.GET, RequestMethod.POST})
public String home(Model model) {
model.addAttribute("resultForm", new HelloForm());
model.addAttribute("world", "World!!");
return "home";
}
@RequestMapping(value = "/result", method = RequestMethod.POST)
public String result(@ModelAttribute HelloForm helloForm, Model model) {
model.addAttribute("resultForm", helloForm);
return "hello-world";
}
}
モデル側
HelloForm.java
package com.sample.forms;
import java.io.Serializable;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class HelloForm implements Serializable {
private static final long serialVersionUID = 1L;
@NotNull
@Size(min = 5, max = 10)
private String greeting;
private String name;
public void setGreeting(String greeting) {
this.greeting = greeting;
}
public String getGreeting() {
return this.greeting;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}
ビュー側
home.html (src/main/resources/templates/home.html)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Home</title>
</head>
<body>
<h1>Hello, <span th:text="${world}"></span></h1>
<form th:action="@{/result}" method="post">
<div><label> Greeting : <input type="text" name="greeting"/> </label></div>
<div><label> Name: <input type="text" name="name"/> </label></div>
<input type="submit" value="Login"/>
</form>
</body>
</html>
hello-world.html (src/main/resources/templates/hello-world.html)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Result</title>
</head>
<body>
<h1>Result</h1>
<p th:text="${resultForm.greeting} + ', ' + ${resultForm.name} + '!'" />
<a href="/">Next</a>
</body>
</html>
■ 実行する
[1] プロジェクトを右クリックし、[Run As]-[3 Spring Boot App]を選択
[2] ブラウザで以下のURLにアクセスする
=> 例えば、Greetingに「Hello」、Name「Mike」を入力し、「Login」ボタン押下。
=> 「Hello, Mike!」が表示される
[[[
http://localhost:8080/]]]
