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Java notes -- process control 1. Sequential structure The basic structure in Java is sequential structure. Unless otherwise specified, it will be executed sentence by sentence in order. Sequential structure is the simplest algorithm structure. Between statements and between boxes, it is carried out in the order from top to bottom. It is co ...

Hibernate JPA complex query 1. JPQL statement Full name of JPQL: Java Persistence Query Language EJB query language (EJB QL) and Java persistent query language (JPQL) introduced in EJB 2.0 are portable query languages. They aim to bind SQL syntax and simple query semantics with the expression of object-oriented expression language. Quer ...

1,hibernate.cfg.xml Comment out this section of configuration <!--Update database level automatically--> <!--<property name="hbm2ddl.auto">create</property>--> 2. New Generate Database Table Tool Class public class HibernateSchemaExport { static Session session; static Configuration ...

First import the corresponding jar package for Spring-hibernate Then prepare the file for the database connectionHibernate.propertiesAlsoJdbc.properties Hibernate.propertiesFile: Configure the hibernate dialect and automatic table building hibernate.dialect=org.hibernate.dialect.H2Dialect hibernate.hbm2ddl.auto=create Jdbc.propertiesFi ...

Last article we wrote about static agents Agent mode of design mode [1] static agent Let's talk about java's dynamic proxy today. 1, Why use dynamic proxy In fact, the dynamic agent makes up for the shortcomings of the static agent. The static agent needs to write a proxy class for each proxy object, ...

brief introduction Based on the ActiveAndroid framework, the Self-encapsulated BaseModel class, and some other operation classes simply need to inherit from BaseModel to have a method of database operation, which is very convenient to use. On how to use ActiveAndroid, I wrote in another of my blogs: http://blog.csdn.n ...

Then I broke it down last time. I didn't see the children's shoes in the first chapter Click here Play back the content of the previous chapter Entity class @Data @AgeSalaryType public class Student { private Long id; @NotBlank(message = "Name cannot be empty") private String name; @ ...

1: Basic concepts of spring 1) Struts 2 is web framework, hibernate is orm framework 2) spring is a container framework, which creates beans and maintains the relationship between beans 3) Spring can manage the web layer, persistence layer, business layer, dao layer, spring can configure the components of each layer, and maintain the relati ...

This paper introduces the simple application of spring boot integrating spring data JPA What is spring data jpa? We can't help thinking about it. In fact, spring data jpa uses hibernate by default and spring data jpa technology, which implements the template Dao layer. It only needs to inherit an interface in Dao to easily complete "add, d ...

0. Preface In the last article, you basically completed the introductory tutorial for EF Core.Starting with this article, we'll try to explore more ORM frameworks on the.net core platform.So let's start with NHibernate. 1. Introduction to NHibernate NHibernate is the C#version of Hibernate, known as the pillar of ORM in Java (at least once).Hib ...