Tag: springboot

Springboot2.x integrated lettuce connection redis cluster reports timeout exception Command timed out after 6 second(s)

Original/Zhu Jiqian Background: Recently, I was doing a stress test on a newly developed Springboot system. I found that when I first started the stress test, I could access data from the redis cluster normally. However, after a few minutes of pause, and then when I continued to use jmeter to perform the stress test, […]

SpringBoot application starts org.apache.catalina.LifecycleException

Table of Contents SpringBoot application starts org.apache.catalina.LifecycleException Problem Description Cause Analysis Solution 1. Check the resources that the application depends on 2. Check application configuration 3. Check port occupancy 4. Check dependent component version compatibility 5. Check the log files Application scenario example: org.apache.catalina.LifecycleExceptionexception caused by database connection exception SpringBoot application starts org.apache.catalina.LifecycleException When developing […]

How to change the corresponding business logic in springboot without changing other people’s code

I think many people are like me and have the same confusion as the title. This problem has puzzled me for a long time, and now I have finally solved it. Next, let me take you through my thinking and solution process. Step one: Let’s build a simple springboot web project. pom.xml <?xml version=”1.0″ encoding=”UTF-8″?> […]

[Springboot] Based on annotation development Springboot-Vue3 integrates Mybatis-plus to implement paging query (2) – front-end el-pagination implementation

Series of articles [Springboot] Based on annotation development Springboot-Vue3 integrates Mybatis-plus to implement paging query – back-end implementation Article directory Series of articles system version Implement function Implementation ideas Data format passed in from backend frontendel-table Encapsulate axois interface Introducing the el-pagination paging component of Element-plus Axois gets background data System version Backend: Springboot 2.7, […]

SpringBoot: SpEL makes complex permission control easy!

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SpringBoot–middleware technology-3: Integrate mongodb, integrate ElasticSearch, attached case with code (simple and easy to understand)

SpringBoot integrates mongodb Implementation steps: pom file import coordinates <!–mongo–> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> Yaml configuration file configures mongodb: spring: data: mongodb: uri: mongodb://localhost/spring Just create a pojo @Data @NoArgsConstructor @AllArgsConstructor public class Book {<!– –> private int id; private String name; […]

Online novels | Implementing novel online reading network based on SpringBoot+Vue

About the author: Java, front-end, and Python have been developed for many years, and have worked as engineers, project managers, and architects. Main contents: Java project development, Python project development, university data and AI project development, microcontroller project design, interview technology compilation, latest technology sharing Collect, like and avoid getting lost. It’s good to follow […]

Multiple instance problems encountered by SpringBoot integrating scheduled tasks

Talk part That’s right. I improved the logging of scheduled tasks a few days ago. Today I switched servers, deployed one more node, and used nginx load balancing. However, when I checked the logs, I found the following situation. That’s bad, the legendary multi-instance problem has appeared. Today we will talk about how to do […]

SpringBoot Cache

The main function of enterprise-level applications is information processing. When data needs to be read, if it is read directly from the database, it will put great pressure on the data layer. At the same time, it is limited by the access efficiency of the database, resulting in low overall system performance. A temporary data […]