Programmer Group

1, Basic knowledge (1) Provider Message producer is the procedure of message delivery. (2) Consumer Message consumers are message receiving programs (3) Messaging when message queuing is not used (4) Message passing method after using message queue (5) What is message queuing A queue is like a warehouse ...

1, Developing web applications Spring Boot Web development is very simple, including common json output, filters, property, log, etc 2, json interface development In the past, when using spring to develop projects, what needs to be done when you need to provide json interfaces? 1. Add related jar packages such as jackjson 2. Configure spri ...

In SpringBoot, there are two different formats for configuration files, one is properties and the other is yaml. Although properties files are common, yaml is more concise and uses more scenarios than properties, and many open source projects are configured using yaml (for example, Hexo).In addition ...

Article directory Record the special exceptions in the process of using the scaffold of the development platform of background management system based on spring boot 2 Exception 1: ` ` java.lang.IncompatibleClassChangeError: Found interface org.objectweb.asm.MethodVisitor, but class was expected`` ...

What is hystrix? hystrix is a fuse protection middleware used by netflix for microservice distributed system. hystrix provides elegant response results to clients after the service is not reachable or the request times out. Why use hystrix? In the microservice scenario, many services depend on e ...

1, concept Spring Batch is a lightweight batch processing framework suitable for enterprise applications. It is worth noting that unlike other scheduling frameworks, Spring Batch does not provide scheduling functions. 2. Batch process Batch processing can be divided into the following steps: Read data Process data according to business The pr ...

java client Mr. Yu Qing provides a java client, but as a C programmer, the Java code written can be imagined. And it's been a long time since maintenance. Here we recommend an open source FastDFS client that supports the latest spring boot 2.0. It is very simple to configure and use. It supports c ...

WebSocket details WebSocket is a full duplex communication protocol provided by HTML5 on a single TCP connection. WebSocket makes the data exchange between the client and the server easier, allowing the server to actively push data to the client. In the WebSocket API, the browser and server only need to complete one handshake, and they can dir ...

Database transactions A series of database operations with ACID characteristics realized by database, a refers to atomicity, C refers to consistency, I refers to isolation, and D refers to persistence; Atomicity refers to that the operation within a transaction is a whole and cannot be subdivided; ...

Security configurations are often used in development, and users who do not have access need to go to the login form page.There are many ways to achieve access control, including through Aop, interceptors, and frameworks (such as Apache Shiro, Spring Security). We describe how Spring Security is used fo ...