<groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> 三、application.yaml 配置H2和JPA注入参数 spring: datasource: data: classpath:db/data.sql driverClassName: org.h2.Driver password: sa platform: h2 schema: classpath:db/schema.sql u...
<properties><java.version>1.8</java.version><druid.version>1.1.2</druid.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>sp...
*/@Id@GeneratedValue(strategy = GenerationType.IDENTITY)privateLong id;@Column(columnDefinition = "VARCHAR(100) UNIQUE NOT NULL")privateString name;@Column(insertable = false, columnDefinition = "DATETIME DEFAULT NOW()")privateDate createTime;// 1、不能删除// @OneToMany(mappedBy = "basic", cas...
drop database if exists demo; create database if not exists demo; use demo; DROP TABLE IF EXISTS WORKER_NODE; CREATE TABLE WORKER_NODE ( ID BIGINT NOT NULL AUTO_INCREMENT COMMENT 'auto increment id', HOST_NAME VARCHAR(64) NOT NULL COMMENT 'host name', PORT VARCHAR(64) NOT NULL COMMEN...
首先我们看一下事务的传播行为有哪些,下面这个类记录了spring事务的所有传播行为 publicenumPropagation{/** * Support a current transaction, create a new one if none exists. * Analogous to EJB transaction attribute of the same name. * This is the default setting of a transaction annotation. */REQUI...
<groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> 1. 2. 3. 4. 在介绍这一组件的使用方法之前,我们有必要对 JPA 规范进行一定的了解。 JPA 全称是 JPA Persistence API,即 Java 持久化 API,它是一个 Java 应用程序接口规范,用于充当面向...
CREATEDATABASE/*!32312 IF NOT EXISTS*/`springboot`/*!40100 DEFAULT CHARACTER SET utf8 */;USE`springboot`;/*Table structure for table `sys_user` */DROPTABLEIFEXISTS`sys_user`;CREATETABLE`sys_user`(`userId`int(10)NOTNULL,`username`varchar(20)NOTNULL,`sex`char(10)DEFAULTNULL,`password`...
在Spring Boot中使用Spring Data JPA需要完成以下步骤：添加依赖：在pom.xml（Maven）或build.gradle（...
使用数据库是开发基本应用的基础,借助于开发框架,我们已经不用编写原始的访问数据库的代码,也不用调用JDBC(JavaData Base Connectivity)或者连接池等诸如此类的被称作底层的代码,我们将从更高的层次上访问数据库,这在Springboot中更是如此,本章我们将详细介绍在Springboot中使用 Spring Data JPA 来实现对数据库的操作...
boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java<...