Programmer Group

1, Understand MySQL master-slave replication 1. Supported replication types STATEMENT: STATEMENT based replication. Execute sql statements on the server and the same statements on the slave server. mysql adopts STATEMENT based replication by default, with high execution efficiency. ROW: ROW based replication. Copy the changed content inst ...

This article is excerpted from the Flyweight Pattern of "design patterns should be learned in this way" 1 story background Because a programmer changed a method parameter in the production environment and changed the int type to Integer type, because money was involved, the company suffered heavy losses and the programmer was dism ...

1, OpeningRedis, as a general cache model, is very popular because of its high performance. Redis version 2.x only supports stand-alone mode, and the cluster mode has been introduced since version 3.0.Redis's Java ecological clients include Jedis, Redisson and lattice. Different clients have different capabilities and use methods. This paper ma ...

background At the beginning of the article, let's talk about the NPE problem. The NPE problem is the NullPointerException we often encounter in development. Suppose we have two classes, and their UML class diagram is shown in the figure below. In this case, there is the following code user.getAddress().getProvince(); In this way, when the u ...

   Introduction ​see? Recently, my brother's partner is going to have a birthday. He came to me to get lessons - there must be various ways to make up that story. Now I wrote a questionnaire and sent it to my wechat friends, as well as this kind of birthday gift, which really made me laugh all night. Let's have a look! Look at ...

As we know, dynamic proxy uses reflection. AOP in Spring uses dynamic proxy, so it is equivalent to using reflection mechanism. So, what is an agent? What is dynamic agent? How is reflection used in dynamic proxies? Today, I'll show you the true face of dynamic agents. Agent mode overview In short, the proxy mode is to use the proxy object to ...

Project address: nlohmann_json_cmake_fetchcontent/json.hpp at master · ArthurSonzogni/nlohmann_json_cmake_fetchcontent · GitHub design goal Intuitive syntax. In like Python In such a language, JSON is like a first-class data type. We used all the magic of modern C + + operators to achieve the same feeling in your code. Look at the fol ...

Android Malware Detection with Seq2vec Android malware detection based on Seq2vec, and the data set is taken from CICMalDroid 2020 , and feature extraction is carried out. introduction Recently, I have been doing research on static detection of Android malware. Previously, I released two versions, both of which have a high recognition rate o ...

1 what is JUC 1.1 introduction to JUC In Java, the thread part is a key point. The JUC mentioned in this article is also about threads. JUC is short for Java. Util. Concurrent toolkit. This is a toolkit for processing threads. JDK 1.5 began to appear. 1.2 processes and threads Process is a running activity of a computer program on a data s ...

                    catalogue          I. concept of service         II. Creation method of service                 < 1> Specific steps for service creation             ...