Hibernate建表——将MySQL的JSON列映射到Java字段（Jpa/Hibernate——Java）

背景

• 从 MySQL 5.7.8 开始，MySQL 支持原生的 JSON 数据类型。
• 那使用ORM框架时，如何把MySQL的JSON类型映射到Java字段上？

开发环境

• Maven3.5
• Spring Boot 2.2.1 RELEASE
• Spring Data JPA 2.2.1 RELEASE
• Hibernate 5.4.10 Final

使用如下

• pom.xml引入（只显示和文章有关的依赖）

• <properties>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>1.8</java.version>
     <resource.delimiter>@</resource.delimiter>
     <spring-boot-starter.version>2.2.1.RELEASE</spring-boot-starter.version>
  </properties>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     <version>${spring-boot-starter.version}</version>
     <exclusions>
        <exclusion>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
     </exclusions>
  </dependency>
  <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-jpa</artifactId>
     <version>${spring-boot-starter.version}</version>
     </dependency>
  <dependency>
     <groupId>org.hibernate</groupId>
     <artifactId>hibernate-core</artifactId>
     <version>5.4.10.Final</version>
  </dependency>
  <dependency>
     <groupId>com.vladmihalcea</groupId>
     <artifactId>hibernate-types-52</artifactId>
     <version>2.9.4</version>
  </dependency>

  • 注意：一定要引入hibernate-types-XXXX这个依赖！！
• Java实体配置

• /**
   * @author ********
   * @Description: 审计记录
   * @date 2020/4/27
   */
  @Entity
  @Table(name = "audit_record",
          uniqueConstraints = {
                  @UniqueConstraint(name = "audit_record_mid",columnNames = {"audit_record_mid"})
          })
  @Getter
  @Setter
  @DynamicInsert
  @DynamicUpdate
  @TypeDef(name="json",typeClass = JsonStringType.class)
  public class AuditRecordTable implements Serializable {
  
      @JsonIgnore
      @Id
      @GeneratedValue(strategy = GenerationType.SEQUENCE)
      @Column(name = "audit_record_id", columnDefinition = "BIGINT", updatable = false, nullable = false, unique = true)
      private BigInteger auditRecordId;
  
      @JsonIgnore
      @Column(name = "audit_record_mid", columnDefinition = "varchar(36) NOT NULL COMMENT '记录编号'")
      private String auditRecordMid;
  
      @JsonIgnore
      @Column(name = "audit_date", columnDefinition = "varchar(36) NOT NULL COMMENT '审计日期'")
      private String auditDate;
  
      @JsonIgnore
      @Column(name = "order_total_amount", columnDefinition = "decimal(20,6) NOT NULL COMMENT '订单总金额'")
      private BigDecimal orderTotalAmount;
  
      @JsonIgnore
      @Column(name = "payment_total_amount", columnDefinition = "decimal(20,6) NOT NULL COMMENT '支付总金额'")
      private BigDecimal paymentTotalAmount;
  
      @JsonIgnore
      @Type(type="json")
      @Column(name = "paied_order_mid_list", columnDefinition = "json")
      private List<String> paiedOrderMidList;
  
      @JsonIgnore
      @CreationTimestamp
      @Column(name = "cdate", updatable = false, columnDefinition = "timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP")
      private LocalDateTime cdate;
  
      @JsonIgnore
      @UpdateTimestamp
      @Column(name = "mdate", columnDefinition = "timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
      private LocalDateTime mdate;
  
  }

  • Java实体中，对应MySQL中的JSON类型配置已标记颜色！！！
• MySQL自动建表如下图
•