jpa
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| + | Jpa is a java framework to manage relational database records as plain java objects. | ||
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| + | It can be confirured (if you are using [[maven]] and spring boot) in the pom file, with the following dependencies: | ||
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| + | <dependency> | ||
| + | <groupId>org.springframework.boot</groupId> | ||
| + | <artifactId>spring-boot-starter-data-jpa</artifactId> | ||
| + | </dependency> | ||
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| + | And you will need to specify a database, for example: | ||
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| + | <dependency> | ||
| + | <groupId>mysql</groupId> | ||
| + | <artifactId>mysql-connector-java</artifactId> | ||
| + | <scope>runtime</scope> | ||
| + | </dependency> | ||
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| + | Or | ||
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| + | <dependency> | ||
| + | <groupId>com.h2database</groupId> | ||
| + | <artifactId>h2</artifactId> | ||
| + | <scope>runtime</scope> | ||
| + | </dependency> | ||
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| + | In addition, you have to configure some properties, that can be done in the properties file or by java code. In the property file would be: | ||
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| + | # JPA (JpaBaseConfiguration, HibernateJpaAutoConfiguration) | ||
| + | #spring.jpa.properties.hibernate.default_schema=sql7351295 | ||
| + | spring.jpa.properties.hibernate.format_sql=true | ||
| + | spring.jpa.properties.hibernate.generate_statistics=true | ||
| + | #to generate the tables, fields and other ddl structures if they are not present | ||
| + | spring.jpa.hibernate.ddl-auto=update | ||
| + | #to transform the hql queries in sql to be seen in the logfile | ||
| + | spring.jpa.show-sql=true | ||
| + | |||
| + | #to use a h2 in memmory embedded database | ||
| + | spring.datasource.url=jdbc:h2:mem:testdb | ||
| + | #to use a h2 file database | ||
| + | #spring.datasource.url=jdbc:h2:file:/data/demo | ||
| + | spring.datasource.driverClassName=org.h2.Driver | ||
| + | spring.datasource.username=sa | ||
| + | spring.datasource.password=password | ||
| + | spring.jpa.database-platform=org.hibernate.dialect.H2Dialect | ||
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jpa.txt ยท Last modified: 2020/07/19 07:11 by admin
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