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Introduction of JAP Framework JPA(Java Persistence API), which means Java persistence API, is the Java persistence specification proposed by Sun after JDK 5.0. The main purpose is to simplify the development of persistence layer and integrate ORM technology, to end the situation of Hibernate, TopLink, JDO and other ORM frameworks operating inde ...

Main Class Description for Starting Advertising Playing System /** * SponsorApplication for Advertising Sponsor/Delivery Service Startup Class * After adding the annotation {@link EnableFeignClients}, other microservices can be invoked by the current microservice. * However, the current service is provided by advertisements, and no other mic ...

SpringBoot uses the Hibernate-validate checking framework ValidateRules @ NotBlank: Determines whether a string is null or empty (removing the first and last spaces). @ NotEmpty: Determines whether a string is null or empty. @ Length: Determine the length of a character (maximum or minimum) @ M ...

Every sentence In Deep Work, the author puts forward a formula: high quality output = time * concentration. So high quality output does not depend on time, but on efficiency. Relevant Reading [Xiaojia Java] Deep understanding of data validation: Java Bean Validation 2.0 (JSR303, JSR349, JSR380) Hibernate-Validation 6.x use caseKnow more about B ...

We know that programs are usually hierarchical, and different layers are usually developed by different people. If you're an experienced programmer, I'm sure you've seen the same validation code in different layers, which is spam code in a sense. To solve this problem, Bean Validation defines the corresponding metadata model and API for JavaBea ...

Preface: The company has an asset statistics system, which is very low in usage, but requires fast query speed in use. Therefore, we want to make some caches stored in memory, not used for a long time, persistent to disk, and recycle garbage, return physical memory to the operating system, so as to save valuable resources to other businesses. S ...

Introducing Maven dependency packages <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency&g ...

Set Mapping Development process: requirements analysis/database design, project design/coding/testing/implementation deployment online/acceptance Requirements: User purchase, fill in the address! Database Design: Not available yet Code javabean designpublic class User { private int userId; private String userName; // One us ...

In Hibernate, there are usually two ways to configure object-relational mapping, one is based on xml, the other is based on annotation of Hibernate Annotation library. In Hibernate version 3.2 and Java 5 environment, annotations are used to configure object-relational mapping. After using Hibernate annotations, the *.hbm.xml file corresponding ...

1. Objects are often used to operate in java web design, and object sets are saved in hibernate (one-to-many) The following steps are required: 1) Designing data table relationships 2) Introducing jar packages requires attention to introducing database connector 3) Write entity classes 4) Configuration mapping file and hibernate.cfg.xml   Two c ...