前言

最近有一个新项目，由于信息安全等要求只能使用达梦数据库（dm8），之前从来没用过，特此开一个笔记记录一下spring boot+jpa如何使用达梦数据库完成开发。

依赖

pom文件需要

        <!-- https://mvnrepository.com/artifact/com.dameng/Dm8JdbcDriver18 -->
        <dependency>
            <groupId>com.dameng</groupId>
            <artifactId>Dm8JdbcDriver18</artifactId>
            <version>8.1.1.49</version>
        </dependency>

        <dependency>
            <groupId>com.dameng</groupId>
            <artifactId>DmDialect-for-hibernate5.3</artifactId>
            <version>8.1.1.49</version>
        </dependency>

配置

spring:
  devtools:
    restart:
      enabled: false
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: "dm.jdbc.driver.DmDriver"
    url: "jdbc:dm://${DM_HOST}:${DM_PORT}/${DM_DATABASE}"
    username: ${DM_USERNAME}
    password: ${DM_PASSWORD}
    druid:
      initial-size: 5
      min-idle: 20
      maxActive: 100
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      minEvictableIdleTimeMillis: 300000
      validationQuery: "SELECT 1"
      testWhileIdle: true
      testOnBorrow: true
      testOnReturn: false
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 10
      filters: "stat,slf4j"
      web-stat-filter:
        enabled: false
  jpa:
    database-platform: "org.hibernate.dialect.DmDialect"
    show-sql: true
    open-in-view: false
    hibernate:
      default_schema: suos
      ddl-auto: none
    properties:
      javax:
        persistence:
          sharedCache:
            mode: ENABLE_SELECTIVE
      hibernate:
        default_schema: ${DM_DATABASE}"
        use_jdbc_metadata_defaults: false
        enable_lazy_load_no_trans: true
        format_sql: true
        connection:
          provider_disables_autocommit: false
        generate_statistics: false
        id:
          new_generator_mappings: true
        jdbc:
          batch_size: 25
        order_inserts: true
        order_updates: true
        query:
          fail_on_pagination_over_collection_fetch: true
          in_clause_parameter_padding: true
        show_sql: true
        dialect: org.hibernate.dialect.DmDialect

对应的domain类和repository

domain

import io.swagger.v3.oas.annotations.media.Schema;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.experimental.SuperBuilder;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;

import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.Table;

@NoArgsConstructor
@SuperBuilder
@Getter
@Setter
@Entity
@EntityListeners(AuditingEntityListener.class)
@Table(schema = "SUOS")
public class Class extends AbstractModel{
    @Schema(description = "校区id")
    private Integer campusId;

    @Schema(description = "校区名称")
    private String campusName;

    @Schema(description = "专业id")
    private Integer majorId;

    @Schema(description = "专业代码")
    private String majorCode;

    @Schema(description = "专业名称")
    private String majorName;

    @Schema(description = "方向")
    private String field;

    @Schema(description = "界别")
    private String grade;

    @Schema(description = "班级名称")
    private String name;

    @Schema(description = "班号")
    private String number;
}

注意这个schema最好是带上，不然可能会给你写到默认database里去
repository

import com.timerchina.suos.domain.Class;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

public interface ClassRepository extends JpaRepository<Class, Integer>, JpaSpecificationExecutor<Class> {

}