Programmer Group

This article introduces how to customize the Java annotation processor and related knowledge. After reading this article, you can easily understand and understand the application of the annotation processor of major open source frameworks."Garden tour is not worth it"Should pity clogs tooth print moss, small buckle firewood door can't ...

This article is excerpted from "design patterns should be learned this way"1 use memo mode to realize the draft box functionWe have all used the rich text editor in web pages. The editor usually comes with operations such as draft box and undo. The following code is used to realize such a function. Suppose we publish an article in the ...

prefaceIn daily development, we often use some date related data operations, such as obtaining the week corresponding to the date, obtaining the existence of a month, etc.The date API design before Java 8 is very anti-human. For the time created with new Date(), the year is obtained by 1 starting from 1900, and the obtained month 0 represents J ...

At present, the common application software has the shadow of delayed message push, which is also widely used, such as:Taobao automatically confirms receipt within seven days. After we sign for the goods, the logistics system will delay sending a message to the payment system seven days later to inform the payment system to call the merchant. T ...

Realization idea AVL balanced binary tree adds the balancing function on the basis of binary search tree, that is, after inserting data according to the rules of balanced binary tree, it is still necessary to ensure that the depth difference between the left and right subtrees of any node does not exceed 1, so as to ensure the query effici ...

1, beans.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="Mysql ...

Resource download: https://download.csdn.net/download/weixin_44893902/45601185 Exercise point design: modify, delete 1, Language and environment Implementation language: JAVA language.Environment requirements: MyEclipse/Eclipse + Tomcat + MySql.Use technology: Jsp+Servlet+JavaBean or spring MVC + Spring + mybatis. 2, Realize function ...

Why can Kotlin write Android programs? Because the code written in Java language needs to be compiled into a. class file to execute, and the code written in Kotlin will also be compiled into a. class file. For the Android operating system, it does not need to care or care about the language in which the program is developed, as long as the fina ...

As a Gopher, we can easily form a programming convention: whenever there is an object x that implements the io.Closer interface, after getting the object and checking the error, we will immediately use defer X. close() to ensure that the X object is closed when the function returns. Here are two examples of idiomatic writing.HTTP requestresp, e ...

Asynchronous call to mqtt message processing through annotation based on SpringBoot Use background In the production environment, as mqtt producers produce more and more messages, it may lead to message accumulation. Therefore, consumers need to consume quickly One of the schemes is to use asynchronous threads to speed up the consumption o ...