エンティティとは?
-> relational databaseの表を表す
src/main/resources/templates/test1/index.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8">
<title>check</title>
</head>
<body >
<form method="post" action="#" th:action="@{/test1/testform}" th:object="${test1Form}">
<p><input type="text" id="id" name="id" th:field="*{id}"/></p>
<p><input type="text" id="name" name="name" th:field="*{name}"></p>
<p><input type="submit" value="送信ボタン"></p>
</form>
</body>
</html>
フォームクラス: Test1Form.java
L controllerのmodel.addAttribute(“test1Form”, new Test1Form());でvalidationをかけている
package com.example.demo;
public class Test1Form {
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
エンティティのクラス: Syain.java (社員)
L formのvalidationと同じく、privateで宣言して、geter, setterを書く
L getter, setterは、データを外部から取得するメソッド、あるいはそのデータを外部から変更するメソッド
package com.example.demo;
public class Syain {
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
MainController.java
package com.example.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@Controller
@RequestMapping("/test1")
public class MainController {
@Autowired
private SyainRepository syainRepository;
@GetMapping
public String disp1(
Model model) {
model.addAttribute("test1Form", new Test1Form());
return "test1/index";
}
@PostMapping("/testform")
public String disp2(Test1Form test1Form) {
Syain syain = new Syain();
syain.setId(test1Form.getId());
syain.setName(test1Form.getName());
syainRepository.insertSyain(syain);
return "redirect:/test1/";
}
}
pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
SyainRepository.java
package com.example.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
@Repository
public class SyainRepository {
private final JdbcTemplate jdbcTemplate;
@Autowired
public SyainRepository(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public void insertSyain(Syain syain) {
jdbcTemplate.update("INSERT INTO syain(id,name) VALUES (?, ?)",
syain.getId(), syain.getName());
}
}
Description:
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
なるほど、何となくわかってきた。
