Spring Boot整合JPA

最新推荐文章于 2025-02-08 18:37:12 发布

原创最新推荐文章于 2025-02-08 18:37:12 发布 · 102 阅读

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本文介绍了一个使用Java Persistence API (JPA)实现的对象关系映射(ORM)案例，通过创建项目【JPADemo】并定义评论实体类【Comment】来演示如何进行数据库交互。文章详细展示了实体类的定义方法及其属性。

1、创建项目【JPADemo】
添加项目依赖
在这里插入图片描述
2、创建实体类ORM: Object Relation Mapping 对象关系映射
创建评论实体类【Comment】

package net.qyk.lesson07.bean;

import javax.persistence.*;


@Entity(name = "t_comment")
public class Comment {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Integer id;
    @Column(name = "content")
    private String content;
    @Column(name = "author")
    private String author;
    @Column(name = "a_id")
    private Integer aId;

    public Integer getId() {
        return id;
    }

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

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public Integer getaId() {
        return aId;
    }

    public void setaId(Integer aId) {
        this.aId = aId;
    }

    @Override
    public String toString() {
        return "Comment{" +
                "id=" + id +
                ", content='" + content + '\'' +
                ", author='" + author + '\'' +
                ", aId=" + aId +
                '}';
    }
}