Spring - CatWolf

Spring

The java enterprise website source code template screen adaptively has the front and back springmvc SSM generation static

Front desk: supports four sets of templates, which can be switched in the background Click: Get the address QQ 313596790 Official website http://www.fhadmin.org/ system introduction: 1. The website background uses the mainstream SSM framework jsp JSTL, and the website background uses the freemaker static template engine to generate html 2. Because it is generated html, the access speed is fast, light, and the burden on the server is small 3. The front end of the website adopts mainstream respons

Spring

Talk about OpenSessionInView of spring data jpa

sequence This article mainly studies the OpenSessionInView of spring data jpa Open Session In View Open Session In View is abbreviated as OSIV, which is to solve the LazyInitializationException thrown by the session when the lazy load property of hibernate is used in the mvc controller; for hibernate, the ToMany relationship defaults to lazy loading, while the ToOne relationship defaults to immediate load JpaProperties spring-boot-autoconfigure-2.1.4.RELEASE-sources.jar!/org/springframework/boot

Spring

In-depth analysis of the memory model of Java multithreading

Internal java memory model Hardware-level memory model The relationship between Java memory model and hardware memory model Visibility of shared objects Resource racing The Java memory model is a good description of how the JVM works in memory. JVM can be understood as an operating system executed by Java. As an operating system, there is a memory model, which is what we often call the JAVA memory model. If we want to write multi-threaded parallel programs correctly. It is extremely important t

Spring

[Pit] executable configuration of spring-boot-maven-plugin

Problem Description Recently, after deploying the project built by Spring Boot to the production environment through the company's unified deployment platform, there was a problem that the project startup log did not exist during deployment. Result : The project failed to start. Self-examination process Download the compiled pre-release package to the local, and the content is as shown in the figure below. After inspection, the content of the package is completely correct. Next, apply for the ba

Spring

Java version of e-commerce spring cloud distributed microservice b2b2c social e-commerce (14) service registration (consul)

Springcloud b2b2c e-commerce social platform source code, please add penguin request: one zero three eight seven seven four six two six. This article mainly introduces the spring cloud consul component, which is a tool that provides service discovery and configuration. Consul is distributed, highly available, and highly scalable.1. Introduction to Consul Consul has the following properties:Service discovery: Consul registers services through http, and services and services interact with each oth

Spring

spring boot automatic assembly

Summary Record how spring realizes yml automatic assembly when looking at the spring boot source code. Entrance In the spring boot startup class, it @SpringBootApplicationis the clue @EnableAutoConfigurationto realize automatic assembly, and the core of automatic assembly can be found through the code . EnableAutoConfigurationFind it in the class and EnableAutoConfigurationImportSelector continue to follow the code. The method of getCandidateConfigurations in the selectImports method to obtain t

Spring

Preliminary practice of front-end error monitoring SDK

Preface As a front-end, I often encounter situations where online errors are reported but cannot be reproduced. If there is error monitoring at this time, it can quickly help us locate the problem, and then find the relevant information of the error monitoring to try to implement an own SDK. Here I and two terms as a focus point to be realized. Complete code Error monitoring Runtime error window.onerror = (msg,url,lineNo,columnNo,e) => { // ... } promise reject was not processed window.addEve

Spring

Quickly build springmvc framework under myeclipse

Under the instructions before the start of the construction, springmvc is a framework fired up by training institutions. For many small and medium-sized companies, it is a framework that has to be used, but I think an experienced back-end engineer should not use this over-design. Frame . First, just create a back-end project and right-click to select Configure faces..->install spring facet Enter this interface Next, remove the first two check boxes Put the code in the display-name under web.x

Spring

java ready-made website source code SSM framework freemaker static engine springmvc

Front desk: Support four sets of templates, you can switch in the background Click: Get the address QQ 313596790 Official website http://www.fhadmin.org/ System introduction: 1. The website background adopts the mainstream SSM framework jsp JSTL, and the website background adopts freemaker static template The engine generates html 2. Because it is generated html, the access speed is fast, light, and the burden on the server is small. 3. The front-end of the website adopts mainstream responsive l

Spring

[Java development of Linux articles] deployment and operation of spring boot project

Foreword: In the java development process, in addition to deploying the war package using tomcat, there is also a scenario where you can directly use maven to package into a Jar package to run the spring boot project. The fox will write down all the frequently used items. This article only represents the summary and understanding of yours. If there are any mistakes or omissions, please correct me... The old fox used the two commonly used projects to demonstrate, in fact, they are analogous. Alth

Spring

Java version spring cloud+spring boot+redis multi-tenant social e-commerce platform (3) SpringBoot uses JdbcTemplates to access Mysql

Ready to workjdk 1.8maven 3.0ideamysqlSpringcloud b2b2c e-commerce social platform source code, please add penguin request: one zero three eight seven seven four six two six. Initialize mysql:-- create table `account` DROP TABLE `account` IF EXISTS CREATE TABLE `account` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(20) NOT NULL, `money` double DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8; INSERT INTO `account` VALUES ('1', 'aaa', '1000'); INSER

Spring

Android: The summary knowledge about multithreading is here!

Preface Multi-threaded applications are very common in Android development. Common methods are mainly: Schematic diagram Today, I will present a comprehensive & detailed Android multithreading study guide, I hope you like it. table of Contents Schematic diagram 1. Basic knowledge of multithreading Before understanding the implementation of Android multithreading, you need to understand some basic knowledge of multithreading, such as threads, processes, etc. For details, please see the artic

Spring

Visual operation and maintenance monitoring of EMQ X IoT MQTT server based on Prometheus and Grafana

Prometheus is solved by SoundCloud open source monitoring alarm program, support multidimensional data model (timing consists of labels metric name and k / v's), with a flexible query ( PromQL ), supports a variety of data acquisition Exporters ; supports alarm management, based on indicators Realize alarm monitoring; support multiple statistical data models, and friendly graphical display. In addition to the built-in browser, the graphical display also supports Grafana integration. The Interne

Spring

Best practices for Kubernetes Ingress log analysis and monitoring

Ingress mainly provides routing functions at the HTTP layer (layer 7), which is currently the mainstream exposure method of HTTP/HTTPS services in K8s. In order to simplify the threshold for users to analyze and monitor Ingress logs, Alibaba Cloud Container Service and Log Service connect Ingress logs, and only need to apply a yaml resource to complete the deployment of a complete set of Ingress log solutions such as log collection, analysis, and visualization. Preface At present, Kubernetes (K8

Spring

Spring boot entry five spring mvc spring boot mybatis configuration integration

Everyone has a basic understanding of Spring Boot, but Spring Boot is just a box that encapsulates and integrates references. It needs to be combined with specific projects to be truly used.It is mainly to record the integration of Spring Mvc and mybatis using Spring Boot:The specific configuration is as follows:1. Create a Maven project, which can be a web project or a basic maven project,2. Configure pom.xml 3. Configure the properties fileCreate application.properties in the resources directo

Spring

SpringCloud's circuit breaker aggregation monitoring (Hystrix Turbine)

1. Introduction to Hystrix Turbine Looking at the data of a single Hystrix Dashboard does not have much value. If you want to see the Hystrix Dashboard data of this system, you need to use Hystrix Turbine. Hystrix Turbine integrates Hystrix Dashboard data for each service. The use of Hystrix Turbine is very simple, you only need to introduce the corresponding dependencies and add annotations and configurations. 2. Preparatory work The project used in this article is the project of the previous a

Spring

Failed to bind properties under'spring.datasource' to javax.sql.DataSource:

When springboot integrates druid, the data source of druid is introduced, and the relevant configuration is configured in the configuration file application.yml spring: datasource: username: root password: 123456 url: jdbc:mysql://192.168.2.218:3306/test driver-class-name: com.mysql.jdbc.Driver type: com.alibaba.druid.pool.DruidDataSource initialSize: 5 minIdle: 5 maxActive: 20 maxWait: 60000 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: SELECT 1 FROM D

Spring

Python- multithreading other attributes and inheriting the Thread class

1. Pull the sebp/elk image[AppleScript] Plain text view Copy code?1sudo docker pull sebp/elk2. Run the ELK container When running the elk container, you need to forward the port of the host to the container, where the ES port is 9200, the kibana port is 5601, and the logstash is 5044 (Note: you can enter the container to modify it, and then freely allocate it); it is recommended to configure the The data is stored on the host for easy maintenance, so the host directory needs to be mounted in the

Spring

Netty event monitoring and processing (below) [with benefits]

The previous article introduced the basic concepts of event monitoring, responsibility chain model, socket interface and IO model, thread model, and the overall structure of Netty. This article will talk about one of the three core modules of Netty: event monitoring and processing. As mentioned earlier, Netty is a NIO framework. It abstracts the establishment, readability, and writability of IO channels into events, which are transmitted in the form of a chain of responsibility. A custom Handler

Spring

iOS multithreading: GCD

1. Introduction to GCD Grand Central Dispatch (GCD) is a newer solution for multi-core programming developed by Apple. It is mainly used to optimize applications to support multi-core processors and other symmetric multi-processing systems. It is a concurrent task executed on the basis of the thread pool model. First introduced in Mac OS X 10.6 Snow Leopard, it can also be used in iOS 4 and above. Why use GCD? Because GCD has many advantages, as follows: GCD can be used for multi-core parallel c

1 2 3 4 5 6 7 8 9 10