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Wechat code scanning payment Recently, when the project was rebuilt, she was responsible for the payment module. WeChat scan code payment (NATIVE) and Alipay scan code payment were also the first contact. Although it was written out according to official documents and some blogs, there were many proble ...

High availability hadoop installation HA Write at the beginning Installation procedure 1. Distribute JDK 1.1 install jdk 2. Synchronization time 3. Configuration file check before installation 4. Secret key free settings of NN and other three machines 5. No secret key between two NN 6. Modify some c ...

Article catalog 1, Foreword 2, MybatisAutoConfiguration 1. Declaration of mybatisautoconfiguration. 2. SqlSessionFactory injection 3. Injection of autoconfiguredmapperscannerregistrar 4. Encapsulation of mypper MapperFactoryBean 3, MapperScannerConfigurer 1. processPropertyPlaceHolders(); 2. Gener ...

Android architecture components – ViewBinding learning notes 1. Problems solved The purpose of ViewBinding is to reduce the use of template code findViewById(int), improve development efficiency, and simplify the code of Activity and Fragment. 2. Using ViewBinding The use of ViewBinding req ...

1. Log framework Xiao Zhang; develop a large system; ​ 1, System.out.println(""); print key data on the console; remove the "key data" button? Write in a file? 2. Framework to record some runtime information of the system; log framework; zhanglogging.jar ; 3. How many functions ar ...

Stage 5: distributed system development: microservice system development (day01) http://doc.canglaoshi.org/ Article catalog Chapter 1: Spring Cloud development environment Chapter 2: introduction to spring cloud framework Section 1: introduction to the concept of spring cloud Section 2: composition ...

8. Elasticsearch Repositories This chapter includes details of the implementation of the elastic search repository 8.1.1. Query methods The elastic search module supports all basic query building features, such as string queries, native search queries, condition based queries, or derived queries from ...

Introduction The mybatis framework is a Java-based persistent layer framework that supports custom frameworks. This article is mainly to understand the mybatis framework, to give a simple introduction to the mybatis framework, to understand how the mybatis framework achieves the operation of the Java ...

1. What is Hystrix and why do I need him? 1. In the micro-service architecture, services are split into individual services based on business, and there is a dependency between services (e.g. user adjusts commodities, Adjust inventory, order, etc.), using RestTemplate+Ribbon and Feign between multiple ...

It is difficult to achieve some complex animation effects only by changing the control properties, such as the Nexus boot animation. This will show how to use PathMeasure and SVG animation to achieve complex animation effects. initialization: PathMeasure is similar to a calculator. It can calculate ...