Spring Data JPA怎么实现持久化存储数据到数据库

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1.SpringBoot项目整合JPA

1.1 pom.xml依赖

        1.8        UTF-8        UTF-8        2.3.7.RELEASE                            org.springframework.boot            spring-boot-starter-data-jpa                            org.springframework.boot            spring-boot-starter-web                            mysql            mysql-connector-java            runtime                            org.projectlombok            lombok                            org.springframework.boot            spring-boot-starter-test            test                                                org.junit.vintage                    junit-vintage-engine                                                                                org.springframework.boot                spring-boot-dependencies                ${spring-boot.version}                pom                import                        

1.2 application配置文件

application.yml文件如下

# 应用名称spring:  application:    name: springboot-jpa01  # jpa参数配置  jpa:    database: MySQL    database-platform: org.hibernate.dialect.MySQL5InnoDBDialect    show-sql: true    hibernate:      ddl-auto: update  # 运行环境设置  profiles:    active: dev# 应用服务 WEB 访问端口server:  port: 8080

application-dev.yml文件如下

# 应用名称spring:  datasource:    driver-class-name: com.mysql.cj.jdbc.Driver    url: jdbc:mysql://localhost:3306/yg-jpa?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8    username: root    password: root

2.创建实体类

创建与数据库表映射的实体类，绑定字段之间的对应关系，如下

package com.kkarma.web.entity;import com.fasterxml.jackson.annotation.JsonFormat;import com.fasterxml.jackson.annotation.JsonIgnore;import lombok.Data;import org.hibernate.annotations.GenericGenerator;import org.springframework.data.annotation.CreatedBy;import org.springframework.data.annotation.CreatedDate;import org.springframework.data.annotation.LastModifiedBy;import org.springframework.data.annotation.LastModifiedDate;import org.springframework.format.annotation.DateTimeFormat;import javax.persistence.*;import java.time.LocalDateTime;/** * @Author: karma * @Date: 2022/3/31 0031 - 03 - 31 - 15:13 * @Description: com.kkarma.web.entity * @version: 1.0 */@Entity@Table(name = "sys_member")@Datapublic class Member {    @Id()    @GeneratedValue(strategy = GenerationType.IDENTITY)    @Column(name = "member_id")    private Long memberId;    @Column(name = "member_name", unique = true, nullable = false, length = 64)    private String memberName;    @Column(name = "password", length = 256)    @JsonIgnore    private String password;    @Column(name = "dept_id")    private Integer deptId;    @Column(name = "realname", length = 64)    private String realName;    @Column(name = "avatar", length = 500)    private String avatar;    @Column(name = "phone", length = 11)    private String phone;    @Column(name = "email", length = 64)    private String email;    @Column(name = "gender", length = 1)    private Integer gender;    @CreatedDate    @Column(name = "gmt_create", updatable = false)    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")    @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd HH:mm:ss")    private LocalDateTime gmtCreate;    @CreatedBy    @Column(name = "created_by", updatable = false, length = 64)    private String createdBy;    @LastModifiedDate    @Column(name = "gmt_modified")    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")    @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd HH:mm:ss")    private LocalDateTime gmtModified;    @LastModifiedBy    @Column(name = "updated_by", length = 64)    private String updatedBy;    @Column(name = "remark", length = 64)    private String remark;}

3.启动项目，测试验证

启动项目成功之后，会自动在数据库中创建数据库表，如果创建数据库表成功，说明JPA框架继承和配置都是OK的。

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