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I. Introduction Topic Exchange Match the routing key to a pattern. At this time, the queue needs to be bound to a mode. The symbol "ා" matches one or more words, and the symbol "*" does not match many words. So "audit. *" can match "audit.irs.corporate", but "audit. *" only matches "audit.i ...

targetSdkVersion The most interesting of the three version numbers is targetSdkVersion. targetSdkVersion is the main basis for Android to provide forward compatibility. The system will not apply the latest behavior changes until the targetSdkVersion of the application is updated. This allows you to ...

Before that, we talked about the stream operation in java8, which is divided into intermediate operation and terminal operation. In terminal operation, we also saw the reduction mode. This article mainly refers to the reduction operation mode collection, collector operation and collector operation, which can be regarded as a mo ...

Development tools: STS Code download link: https://github.com/theIndoorTrain/Springboot/tree/8878e8e89ce01ceb967ef8c1193ac740a6f7dd40 Preface: On your birthday, Tencent will send you a beautiful birthday wish email When you register an account on a website, you often need to activate the verification in the email Let's talk about this tec ...

Article Directory Web Start Test Starter Data JPA Starter Mail Starter conclusion Dependencies are a very important aspect of any complex project that requires attention and information. Important as they are, we don't need to spend too much time on them, because dependencies are just a framework. ...

Article directory Traditional way Chain method Automatic generation of idea It is often seen that some codes are initialized with consecutive. set() methods, which are chained method calls. Traditional way In general, when initializing an object, we can call the. set() method to assign a value t ...

Java collection framework Java collection overview Front storage objects, arrays, disadvantages A Java collection is like a container in which you can put references to multiple objects. Java collection classes can be used to store multiple objects with different numbers, and can also be used to store ...

dao idea: establish a data interface: Step: 1) create a database 2) Set up the package com > shadow > domian in the project (for storing object classes) Establish object classes according to the tables in the database (in accordance with the javabean specification) 3) Set up the package com? Shadow? Dao in the project ...

I used the connection pool of c3p0 here. Please refer to this link: The basic usage of c3p0 dbutils is just a tool class. If you don't use hibernate, you can consider using. Because it can greatly simplify our code The jar package can be downloaded on the official website or here: The tool class of Java connecting database ...

1. YAML Syntax 1. Basic Grammar The k-space v represents a pair of key-value pairs (which must have spaces) and controls hierarchical relationships by indentation of the spaces. A left-aligned column of data represents the same hierarchy.Property and value case sensitive 1 server: 2 port: 8081 3 servlet-path: /hello 2. Rules f ...