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5. 【Spring】@Columnアノテーションとは

本稿はSpringFrameworkの@Columnについて説明します。

@Columnとは

Entityクラス内で定義したテーブルのカラム名に相当するメンバ変数に付与するのが@Columnとなります。

@Columnではデータ型や長さを指定することが出来ます。

以下、@Columnの実装例です。

package com.example.demo.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="user")
public class User {
    
    @Id

    @GeneratedValue(strategy = GenerationType.AUTO)
   
@Column
    private long id;
    
   
@Column(name="name", length=50, nullable = false)
    private String name;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 

子ページ
子ページはありません
同階層のページ
  1. @After
  2. @Autowired
  3. @Bean
  4. @Before
  5. @Column
  6. @Component
  7. @Configuration
  8. @Controller
  9. @Data
  10. @Entity
  11. @GeneratedValue
  12. @Id
  13. @Modifying
  14. @PathVariable
  15. @PropertySource
  16. @Repository
  17. @RequestBody
  18. @RequestMapping
  19. @ResponseBody
  20. @RestController
  21. @Service
  22. @SpringBootApplication
  23. @Table
  24. @Transactional
  25. @Value

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