SpringBoot整合spring-data-jpa的方法

2023-07-22 13:13:13 243

jpa是JavaEE定义的一种规范，常用的实现一般是Hibernate，而spring-data-jpa则是对jpa的又一层封装，提供了更多便捷的方法。

这里不会深入讲解spring-data-jpa的使用，只是讲解怎么快速的整合使用，目的是帮助那些想学，但是在整合上老是翻车的同学

导入依赖


	com.zaxxer
	HikariCP


	mysql
	mysql-connector-java


	org.springframework.boot
	spring-boot-starter-data-jpa

配置

spring:
data:
jpa:
repositories:
#开启jpa
enabled:true
bootstrap-mode:default
jpa:
#数据库方言
database-platform:org.hibernate.dialect.MySQL57Dialect
open-in-view:false
#打印SQL
show-sql:false
properties:
#格式化输出的SQL语句
hibernate.format_sql:false
hibernate:
#自动建表策略
ddl-auto:update

这里忽略了数据源的配置

关于自动建表策略

#枚举值
spring.jpa.hibernate.ddl-auto
create				不管表是否存在,每次启动都会重新建表(会导致数据丢失)
create-drop			启动的时候创建表,程序退出(SessionFactory关闭)的时候删除表
none				不进行任何操作
update				如果数据表不存在则创建,在实体对象被修改后,下次启动重新修改表结构(不会删除已经存在的数据)
validate			启动的时候验证数据表的结构,

相关的配置类

这里仅仅列出了部分常用的配置，如果需要了解所有的配置信息，可以参考配置类

JpaProperties
SpringDataWebProperties
HibernateProperties

相关配置的文档docs.spring.io/spring-boot…

定义实体类User

importjava.io.Serializable;
importjava.time.LocalDateTime;

importjavax.persistence.Column;
importjavax.persistence.Entity;
importjavax.persistence.Enumerated;
importjavax.persistence.GeneratedValue;
importjavax.persistence.GenerationType;
importjavax.persistence.Id;
importjavax.persistence.Index;
importjavax.persistence.Table;

//指定表名称
@Table(name="user",indexes={
	//定义索引
	@Index(columnList="account",unique=true)
})
//标识实体类
@Entity
//设置表注释
@org.hibernate.annotations.Table(appliesTo="user",comment="用户")
publicclassUserimplementsSerializable{

	/**
	*
	*/
	privatestaticfinallongserialVersionUID=4953012795378725917L;

	@Id//id字段
	@Column(columnDefinition="INT(11)UNSIGNEDCOMMENT'id'")
	@GeneratedValue(strategy=GenerationType.IDENTITY)//自增
	privateIntegerid;

	//账户
	@Column(columnDefinition="VARCHAR(50)COMMENT'登录账户'",nullable=false)
	privateStringaccount;

	//密码
	@Column(columnDefinition="VARCHAR(255)COMMENT'登录密码'",nullable=false)
	privateStringpassword;

	//性别
	@Column(columnDefinition="TINYINT(1)COMMENT'性别。0：男，1：女'",nullable=false)
	@Enumerated
	privateGendergender;

	//创建时间
	@Column(name="created_date",columnDefinition="timestampDEFAULTCURRENT_TIMESTAMPCOMMENT'创建时间'",nullable=false)
	privateLocalDateTimecreatedDate;

	//最后修改时间
	@Column(name="last_modified_date",columnDefinition="timestampNULLDEFAULTNULLCOMMENT'最后一次修改时间'")
	privateLocalDateTimelastModifiedDate;

	//记录状态
	@Column(columnDefinition="TINYINT(1)unsignedCOMMENT'是否启用'",nullable=false)
	privateBooleanenabled;

	publicIntegergetId(){
		returnid;
	}

	publicvoidsetId(Integerid){
		this.id=id;
	}

	publicStringgetAccount(){
		returnaccount;
	}

	publicvoidsetAccount(Stringaccount){
		this.account=account;
	}

	publicStringgetPassword(){
		returnpassword;
	}

	publicvoidsetPassword(Stringpassword){
		this.password=password;
	}

	publicGendergetGender(){
		returngender;
	}

	publicvoidsetGender(Gendergender){
		this.gender=gender;
	}

	publicLocalDateTimegetCreatedDate(){
		returncreatedDate;
	}

	publicvoidsetCreatedDate(LocalDateTimecreatedDate){
		this.createdDate=createdDate;
	}

	publicLocalDateTimegetLastModifiedDate(){
		returnlastModifiedDate;
	}

	publicvoidsetLastModifiedDate(LocalDateTimelastModifiedDate){
		this.lastModifiedDate=lastModifiedDate;
	}

	publicBooleangetEnabled(){
		returnenabled;
	}

	publicvoidsetEnabled(Booleanenabled){
		this.enabled=enabled;
	}

	@Override
	publicStringtoString(){
		return"User[id="+id+",account="+account+",password="+password+",gender="+gender
				+",createdDate="+createdDate+",lastModifiedDate="+lastModifiedDate+",enabled="+enabled
				+"]";
	}

	publicstaticenumGender{
		BOY,GIRL
	}
}

Repository

抽象出BaseRepository

importorg.springframework.data.jpa.repository.JpaRepository;
importorg.springframework.data.jpa.repository.JpaSpecificationExecutor;
importorg.springframework.data.repository.NoRepositoryBean;

@NoRepositoryBean//该接口不是一个Repository，不需要生成代理实现
publicinterfaceBaseRepositoryextendsJpaRepository,JpaSpecificationExecutor							//,QuerydslPredicateExecutor如果使用了QueryDSL还可以实现这个接口
{

}

定义UserRepository

importio.springboot.jpa.entity.User;

publicinterfaceUserRepositoryextendsBaseRepository{

}

Service

抽象出BaseService

importorg.springframework.data.jpa.repository.JpaRepository;
importorg.springframework.data.jpa.repository.JpaSpecificationExecutor;

publicinterfaceBaseServiceextendsJpaRepository,JpaSpecificationExecutor
														//,QuerydslPredicateExecutor
{

}

抽象出AbstractService

importjava.util.List;
importjava.util.Optional;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.data.domain.Example;
importorg.springframework.data.domain.Page;
importorg.springframework.data.domain.Pageable;
importorg.springframework.data.domain.Sort;
importorg.springframework.data.jpa.domain.Specification;
importorg.springframework.transaction.annotation.Transactional;
importio.springboot.jpa.repository.BaseRepository;
publicabstractclassAbstractServiceimplementsBaseService{
	/**
	*泛型注入
	*/
	@Autowired
	protectedBaseRepositorybaseRepository;
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(){
		returnthis.baseRepository.findAll();
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(Sortsort){
		returnthis.baseRepository.findAll(sort);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAllById(Iterableids){
		returnthis.baseRepository.findAllById(ids);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicListsaveAll(Iterableentities){
		returnthis.baseRepository.saveAll(entities);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoidflush(){
		this.baseRepository.flush();
	}
	@Transactional(rollbackFor=Throwable.class)
	publicSsaveAndFlush(Sentity){
		returnthis.baseRepository.saveAndFlush(entity);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddeleteInBatch(Iterableentities){
		this.baseRepository.deleteInBatch(entities);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddeleteAllInBatch(){
		this.baseRepository.deleteAllInBatch();
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicTgetOne(IDid){
		returnthis.baseRepository.getOne(id);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(Exampleexample){
		returnthis.baseRepository.findAll(example);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(Exampleexample,Sortsort){
		returnthis.baseRepository.findAll(example,sort);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicPagefindAll(Pageablepageable){
		returnthis.baseRepository.findAll(pageable);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicSsave(Sentity){
		returnthis.baseRepository.save(entity);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicOptionalfindById(IDid){
		returnthis.baseRepository.findById(id);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicbooleanexistsById(IDid){
		returnthis.baseRepository.existsById(id);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publiclongcount(){
		returnthis.baseRepository.count();
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddeleteById(IDid){
		this.baseRepository.deleteById(id);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddelete(Tentity){
		this.baseRepository.delete(entity);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddeleteAll(Iterableentities){
		this.baseRepository.deleteAll(entities);
	}
	@Override
	@Transactional(rollbackFor=Throwable.class)
	publicvoiddeleteAll(){
		this.baseRepository.deleteAll();
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicOptionalfindOne(Exampleexample){
		returnthis.baseRepository.findOne(example);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicPagefindAll(Exampleexample,Pageablepageable){
		returnthis.baseRepository.findAll(example,pageable);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publiclongcount(Exampleexample){
		returnthis.baseRepository.count(example);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicbooleanexists(Exampleexample){
		returnthis.baseRepository.exists(example);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicOptionalfindOne(Specificationspec){
		returnthis.baseRepository.findOne(spec);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(Specificationspec){
		returnthis.baseRepository.findAll(spec);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicPagefindAll(Specificationspec,Pageablepageable){
		returnthis.baseRepository.findAll(spec,pageable);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publicListfindAll(Specificationspec,Sortsort){
		returnthis.baseRepository.findAll(spec,sort);
	}
	@Override
	@Transactional(readOnly=true,rollbackFor=Throwable.class)
	publiclongcount(Specificationspec){
		returnthis.baseRepository.count(spec);
	}
}

定义UserService

importorg.springframework.stereotype.Service; importio.springboot.jpa.entity.User; @Service publicclassUserServiceextendsAbstractService{ }

添加注解驱动

importorg.springframework.boot.SpringApplication; importorg.springframework.boot.autoconfigure.SpringBootApplication; importorg.springframework.boot.autoconfigure.domain.EntityScan; importorg.springframework.data.jpa.repository.config.EnableJpaRepositories; @SpringBootApplication @EnableJpaRepositories(basePackages={"io.springboot.jpa.repository"}) @EntityScan(basePackages={"io.springboot.jpa.entity"}) publicclassJpaApplication{ publicstaticvoidmain(String[]args){ SpringApplication.run(JpaApplication.class,args); } }

@EnableJpaRepositories指定repository所在的包@EntityScan指定entity所在的包

测试

importio.springboot.jpa.JpaApplication; importio.springboot.jpa.entity.User; importio.springboot.jpa.service.UserService; importjava.time.LocalDateTime; importorg.junit.Test; importorg.junit.runner.RunWith; importorg.slf4j.Logger; importorg.slf4j.LoggerFactory; importorg.springframework.beans.factory.annotation.Autowired; importorg.springframework.boot.test.context.SpringBootTest; importorg.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest(classes=JpaApplication.class,webEnvironment=SpringBootTest.WebEnvironment.RANDOM_PORT) publicclassJpaApplicationTest{ staticfinalLoggerLOGGER=LoggerFactory.getLogger(JpaApplicationTest.class); @Autowired UserServiceuserService; @Test publicvoidtest(){ //存储 Useruser=newUser(); user.setAccount("kevinblandy.cn@gmail.com"); user.setPassword("123456"); user.setGender(User.Gender.GIRL); user.setEnabled(Boolean.TRUE); user.setCreatedDate(LocalDateTime.now()); this.userService.save(user); LOGGER.info("savesuccess....."); //检索 Userresults=this.userService.findById(user.getId()).orElseGet(null); LOGGER.info("queryresult={}",results); } }

自动创建的表

CREATETABLE`user`( `id`int(11)unsignedNOTNULLAUTO_INCREMENTCOMMENT'id', `account`varchar(50)NOTNULLCOMMENT'登录账户', `created_date`timestampNOTNULLDEFAULTCURRENT_TIMESTAMPCOMMENT'创建时间', `enabled`tinyint(1)unsignedNOTNULLCOMMENT'是否启用', `gender`tinyint(1)NOTNULLCOMMENT'性别。0：男，1：女', `last_modified_date`timestampNULLDEFAULTNULLCOMMENT'最后一次修改时间', `password`varchar(255)NOTNULLCOMMENT'登录密码', PRIMARYKEY(`id`), UNIQUEKEY`UKdnq7r8jcmlft7l8l4j79l1h74`(`account`) )ENGINE=InnoDBDEFAULTCHARSET=utf8mb4COMMENT='用户';

执行的日志

Hibernate: insert into user (account,created_date,enabled,gender,last_modified_date,password) values (?,?,?,?,?,?) 2020-06-2317:57:36.264INFO7612---[main]i.s.jpa.test.JpaApplicationTest:savesuccess..... Hibernate: select user0_.idasid1_0_0_, user0_.accountasaccount2_0_0_, user0_.created_dateascreated_3_0_0_, user0_.enabledasenabled4_0_0_, user0_.genderasgender5_0_0_, user0_.last_modified_dateaslast_mod6_0_0_, user0_.passwordaspassword7_0_0_ from useruser0_ where user0_.id=? 2020-06-2317:57:36.303INFO7612---[main]i.s.jpa.test.JpaApplicationTest:queryresult=User[id=1,account=kevinblandy.cn@gmail.com,password=123456,gender=GIRL,createdDate=2020-06-23T17:57:36,lastModifiedDate=null,enabled=true]

总结

到此这篇关于SpringBoot整合spring-data-jpa的方法的文章就介绍到这了,更多相关SpringBoot整合spring-data-jpa内容请搜索毛票票以前的文章或继续浏览下面的相关文章希望大家以后多多支持毛票票！
声明：本文内容来源于网络，版权归原作者所有，内容由互联网用户自发贡献自行上传，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任。如果您发现有涉嫌版权的内容，欢迎发送邮件至：czq8825#qq.com（发邮件时，请将#更换为@）进行举报，并提供相关证据，一经查实，本站将立刻删除涉嫌侵权内容。

上一篇
python安装读取grib库总结(推荐) 下一篇
JS判断数组是否包含某元素实现方法汇总

热门推荐

1 毛坯房验收经验和常识看了之后再验房心里有底

2 二手房收房如何交接二手房收房注意问题

3 专业验收毛坯房的价格商品房验收合格的标准

4 精装房怎么验收精装房请验房师有用吗

5 一般要到哪里找验房师验房师有哪些作用呢

6 请人验房一般是多少钱验房师费用是多少

7 怎样测量房子面积建筑面积和使用面积怎么算

8 收房需要注意什么仔细检查不松懈

9 收房时三书一证一表是什么主要作用介绍

10 交房时交房税费有哪些本文为你一一讲解

11 验房都需要验什么要做哪些准备呢

12 毛坯房验房师有必要请吗毛坯房装修完如何验收

13 地下室防水工程质量验收规范详解

14 水性涂料、油性涂料区别介绍

15 零基础布艺DIY工坊教你做超萌猫头鹰钥匙包

16 三棵树漆怎么样？三棵树漆官方网站

17 家庭“装修套餐”中猫腻你知道吗？

18 小空间大浴望卫浴间装修巧支招

SpringBoot整合spring-data-jpa的方法

热门推荐

随机推荐