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|Overview Shardingsphere Jdbc is positioned as a lightweight Java framework and provides additional services in the Jdbc layer of Java. It uses the client to connect directly to the database and provides services in the form of jar package. It can be understood as an enhanced version of Jdbc driver, which is fully compatible with Jdbc and vari ...

@TOC #Spring collection Record every step of the program___ auth:huf Yesterday, careful students have found a problem; In Spring 5.X or SpringBoot 2.x, the CGLIB interface is used regardless of whether the class implements the interface In Spring 5.X, Spring uses the CGLIB interface by default. In Spring 4, the JDK proxy is used, but after 5. ...

Integrating Elasticsearch with Java SpringBoot Create a project and import dependencies into pom.xml: <!-- SpringBoot Core package --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>Import version number&lt ...

Introduction This number is mainly the sharing of common key technology points and common tool classes of Java; And technology sharing of integration frameworks such as springboot+springcloud+Mybatisplus+druid+mysql+redis+swagger+maven+docker; Technology sharing of big data processing frameworks such as datax, kafka and flink. The article will ...

MySQL34 homework questions 1. Name of the person who gets the highest salary in each department mysql> select e.ename,t.* from emp e join (select deptno,max(sal) as maxsal from emp group by deptno) t on t.deptno = e.deptno and t.maxsal = e.sal; +-------+--------+---------+ | ename | deptno | maxsal | +-------+--------+---------+ | BLAKE | ...

Go kit is a distributed development tool set, which can be used to build micro services in large organizations (businesses). It solves most common problems in distributed systems. Therefore, users can focus on business logic First of all, we should understand that go kit is not a framework. It is just a tool set. It has some toolkits to help ...

🔰 Learning video 🔰 ActiveMQ tutorial (MQ messaging middleware quick start) Number of episodes: 48-57 🔰 Learning maxims 🔰 If you don't practice boxing, you'll end up empty; If the foundation is not strong, the earth will shake. 🔶 Restore the default configuration file of ActiveMQ to facilitate subsequent testing Step 1: d ...

This article introduces an important role in microservices: gateway. As for how to select a gateway, Alibaba has not yet selected a gateway. Of course, it has chosen Spring cloud Gateway. After all, it is my son. The article contents are as follows: Why do I need a gateway? In the traditional monomer architecture, only one service is ope ...

1, Definition of inner class You can put the definition of one class inside the definition of another class, which is the inner class. 2, Type of inner class In Java, inner classes are mainly divided into member inner classes, local inner classes, anonymous inner classes and static inner classes. 1. Member internal class Member interna ...

I'm going to move most of this article. Don't scold me Reference link: Deep understanding of Java classloader Java class loading mechanism Deep understanding of Java class loading Class class No organization, just keep records When a Java program runs, the system always identifies all objects by the so-called runtime type. Thi ...