Programmer Think

1, Preface UCode Cms content management system is an important part of Java knowledge map and a scaffold for enterprise application software development. Current version 1.3.3. Use simple demo project Quick experience Address. (1) Project characteristics 1. Source code open source The source code is open-source, and the MIT open-source lic ...

scene In the development of back-end services, the popular framework combination is SSM (SpringBoot + Spring + MyBatis). When we develop some business systems, there will be many business data tables, and the information in the tables will be inserted again, and many operations may be carried out in the whole life cycle. For example, when we ...

1. Annotation type Java annotation is used to provide metadata for Java code. You can obtain the specified annotation object through reflection, and then obtain the metadata information in the annotation. Java annotations have four standard meta annotations: @ Target, @ Retention, @ Documented, @ Inherited. 1.1 @Target @Target describes ...

backgroundThere is a service in the company project, which is similar to a crawler. It needs to parse the given URL and extract the page title, cover image, summary, icon and other information from the returned HTML. Because this is a pure memory service without DB access, and the downstream service (URL address to be resolved) is not an intern ...

This paper first introduces the concept of optimistic lock, then introduces the implementation principle of optimistic lock, and finally demonstrates the implementation of optimistic lock with a spring boot project. catalogue What is optimistic lock Implementation principle of optimistic lock actual combat What is optimistic lock Durin ...

catalogue Learning objectives: Learning content: Object oriented encapsulation features: Use steps: Advantages of encapsulation: Class definition specification: (JavaBean specification) Scope of local variables and member variables: Static attribute, static method, static code block: Definition: Difference: Example: Static code bloc ...

3 RabbitMQ seven message sending and receiving methods In most cases, we may use RabbitMQ in Spring Boot or Spring Cloud environment 3.1 introduction to rabbitmq architecture This picture involves the following concepts: Producer (Publisher): publish messages to the switch (Exchange) in RabbitMQExchange: establish and receive mes ...

Last December, as Log4J exposed high-risk vulnerabilities, it was not good news for java developers, especially for Ops. The former must repackage their applications with a fixed version of Log4J, while the latter must be redeployed. But for the program log, it is not just. Today, let's take a look at the log mechanism of the java systemIn shor ...

This article comes from the special training column of algorithm interview questions. There are a large number of professional algorithm questions here, such as 21 days of dynamic planning, 28 days of special training in large factories, etc Welcome to study together. Link: Portal Reading guide Fat friends, in order to better help n ...

1, Topic retelling leetCode algorithm Title: https://leetcode-cn.com/problems/H6lPxb/ Briefly described as: 1. Provides an array of strings. There are letter ectopic words between the string elements of the array. For example, "aaabb" and "baaab"; That is, the letters that make up the string are the same, and the letters ap ...