Programmer Think

What is Hibernate: Hibernate is an open-source object relational mapping framework, which encapsulates JDBC with very lightweight objects. It establishes the mapping relationship between POJO and database tables. It is a fully automatic ORM framework. Hibernate can automatically generate SQL statement ...

This blog series is summarized here: Hibernate summary Fetching strategies Fetching strategies 1. Multi to one single end grabbing The first way The second way 2. One to many grabs One end of one is a single object query One end is multiple object queries Source project file: Hibernate 4.3_ ...

SSH integration: Spring 5.2.2 + struts 2.5.22 + Hibernate 5.8 1, Environment construction Database: MySQL 8JDK: 13 jar package Spring Struts Hibernate Spring integrates Hibernate Struts integrates Spring -C3p0 Connect to database Using Hibernate above JDK8 requires importing 2, ...

Singleton mode Usage scenario: Hibernate only needs one SessionFactory In Spring, if scope="singleton" is specified, the bean will be singleton (default singleton is not specified). Business logic component, DAO component and data source component are singleton, because they do not need to save the user's state The ...

Customer.java public class Customer { public Customer() { super(); // TODO Auto-generated constructor stub } public Customer(String cust_name, String cust_source) { super(); this.cust_name = cust_name; this.cust_source = cust_source; } private Long cust_id; private String cust_name; private String cust_so ...

1. I learned crud operation of single table before. In practical applications, most of them are multi table Association operations. This article will learn how to deal with the relationship between multi tables. 2. Investigate the relationship between book list and book classification table. There is a many to one relationship between the book ...

Incorrect thread abort - Stop Stop: Discontinues threads and clears information about monitor locks, but may causeJDK is not recommended for thread security issues.Destroy: JDK does not implement this method. /** * @author simon */ public class StopThread extends Thread { private int i = 0, j = 0; @Override public void run() { ...

In a project, you may encounter that the project architecture is hibernate, but some queries are still used to sql statements, or some queries are more simple and flexible with sql statements. At this point we can inject jdbcTemplate. 1. Configuration and injection of jdbctemplate in non-spring boot projectsConfiguration: Register beans in spri ...

Don't say much, just get to the point! 1. Click File to create a new Module 2. Click and select Spring, then check Spring on the right (when checking Spring, we will prompt you to create spring-config.xml, here we check it for convenience), Web Application, St ...

Preface Recently, when developing the function of a module, it contains a lot of steps of blanking and validating the request parameters, and there are a lot of repeated judgments. Validation affects the beauty of the code and then decides to optimize this part of the code. SpringBoot comes with its own parameter validation box, Hibernate Valid ...