Programmer Help

1, Why use a gateway 2, Gateway entry case 1. Create project 1.1 add coordinates <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org ...

Pay attention to the official account number: CoderBuff, reply to "redis" and get the complete version of Redis5.x tutorial PDF. Redis5.x tutorial directory Chapter I preparation Chapter II data types Chapter III orders Chapter IV configuration Chapter 5 Java client (I) Chapter VI affairs Chapter 7 distributed lock Chapter 8 Java cl ...

1, Reflection: 1. Reflection refers to a class that can be loaded, probed, and used at run time, completely unknown during compilation. 2. In the running state of the program, you can dynamically load a class with only a name. For any loaded class, you can know all the properties and methods of the class; For any object, you can call any of its ...

1, The role of Ribbon in microservices 1. What is Ribbon 1.Ribbon is a client load balancing tool based on HTTP and TCP, which is implemented based on Netflix Ribbon 2. it is not deployed independently like the Spring Cloud service registry, configuration center and API gateway, but it exists in alm ...

MyBatis one-to-one association query In the previous article, it was said that the relationship between user and account is one to many. In turn, the relationship between account and user is actually one to one. Because an account can only belong to one user, the user table and account table are still ...

** Object container ** Sequential container object array Set container Hash table ##3.1 sequence vessel Generally, an array can be created to store data. An array is a kind of container. Because of the limitation of an array, once it is created, its size cannot be changed, we can use a sequential ...

1, Application scenario of agent mode In our life, we often see such scenes, such as: rental and sales agency, marriage agency, broker, express delivery, etc., which are the real life embodiment of agent mode. Proxy Pattern refers to providing a proxy for other objects to control access to this object. The proxy object plays an intermediary rol ...

maven dependence <!-- Swagger2 start--> <dependency>    <groupId>io.springfox</groupId>    <artifactId>springfox-swagger2</artifactId>    <version>2.8.0</version> </dependency> <dependency>    <groupId>io.springfox</groupId&gt ...

As we know, Map is used to store key value mapping. For the object acting as key, it cannot be repeated, and the equals method and hashCode method need to be overwritten correctly If we only need to store non duplicate key s and do not need to store mapped value s, then we can use set. Set is used to st ...

Process control In the process of a program execution, the execution order of each statement has a direct impact on the result of the program. In other words, the process of the program has a direct impact on the running results. Therefore, we must be clear about the execution process of each statem ...