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How to add Spring-Data-Jpa support, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain for you in detail, people with this need can come to learn, I hope you can gain something.

JPA: (Java Persistence API): provides a standard ORM mapping solution, which is the specification for Java to manipulate POJO persistence. Hibernate conforms to the JPA specification.

Spring-Data-Jpa: Spring's support for the JPA framework to simplify the persistence layer code.

Get started with:

Add the following dependencies to the pom.xml file

Hibernate-c3p0: database connection pool

Jackson-core: used to manipulate json data

Spring-boot-starter-data-jpa will use Hibernate to manipulate the database.

Add database-related information to the application.properties file:

Please manually create the database spring_web in mysql and specify the utf-8 character set.

Spring.jackson.data-format: this property allows springmvc to automatically format the date into the corresponding format when it returns json data.

Access the database:

Create a new class under org.ramer.demo: repository.UserRepository:

Create a new class under test/java/org/ramer/demo: repository.TestUserRepository:

Saved successfully! Delete, update, and query will be left to you to test.

Therefore, you have completed the addition, deletion, modification and query of the database with a confused face. Spring-Data-Jpa is not only so powerful, but will continue to use its powerful functions in the future.

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