SpringData关键字查询实现方法详解

一、创建项目并导入Jap相关依赖

1.1

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid-spring-boot-starter</artifactId>
  <version>1.1.10</version>
</dependency>
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <scope>runtime</scope>
  <version>5.1.27</version>
</dependency>

1.2

Application.perteries配置

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

spring.datasource.username=root

spring.datasource.password=123

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/jpa?useUnicode=true&characterEncoding=utf8&useSSL=true&serverTimezone=GMT

#将sql语句展示到控制台

spring.jpa.show-sql=true

spring.jpa.database=mysql

spring.jpa.database-platform=mysql

#ddl-auto:create----每次运行该程序，没有表格会新建表格，表内有数据会清空

#ddl-auto:create-drop----每次程序结束的时候会清空表

#ddl-auto:update----每次运行程序，没有表格会新建表格，表内有数据不会清空，只会更新

#ddl-auto:validate----运行程序会校验数据与数据库的字段类型是否相同，不同会报错

spring.jpa.hibernate.ddl-auto=update

#采用哪种方言

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL57Dialect