Nacos SpringBoot + + Kafka simple implementation service flow arrangements

Click "Java Programming Duck" below to follow and star more exciting articles directly to the source of the article: Foreword I have been developing microservices recently, involving the development of some data processing modules. Each processing bu...

2022-08-06 | Brother migrant worker | 824 views

Seven common ways of writing the singleton design pattern

Seven common ways of writing the singleton design pattern Hungry Chinese style: single instance object is created when the class is loaded The first one: static member variable public class Singleton { //private constructor private Singleton {} //cre...

2022-08-06 | dumb bit | 276 views

Detailed explanation of SpringBoot tasks

SpringBoot Task Details Asynchronous Task Scheduled Task Email Sending 1. Asynchronous Task 1. Write a service AsyncService.java package com.qian.service; import org.springframework.scheduling.annotation.Async; import org.springframework.stereotype.S...

2022-08-06 | Zero degrees Celsius | 711 views

Cross compiling under Linux to generate windows program

The Linux environment uses Ubuntu. The principle is to use mingw32 to cross-compile windows programs to run under windows.The specific steps are as follows: 1. Install mingw32 1. Modify sources.list sudo vim /etc/apt/sources.list Add a new line at th...

2022-08-06 | biigpanda | 215 views

JavaSE methods recursive exercises 】 【 create and use of the array

1. Recursively find the factorial of N public static int fuc int n { if n == 1 { return 1; } int tmp = n/ fuc n 1 ; return tmp; } public static void main String args { System.out.println fuc4 ; } 2. Recursively find 1 + 2 + 3 + … + 10 public static i...

2022-08-06 | Can this code be any cooler? | 809 views

Use idea to create a multi-module Maven project (inheritance and dependencies between modules)

Today, I will record the basic use of maven to create a multi-module project. Everyone who sees this blog, if there is something wrong, please point it out by private message me or comment on this blog in time, so as not to mislead the children.Thank...

2022-08-06 | _Kakashi_ | 179 views

[2] Java operation mode, program structure and notepad++

Work together to create and grow together This is the 5th day of my participation in the "Nuggets Daily New Project · August Update Challenge", click to view the details of the event' 'The text document wrote the first Java file and ran successfully....

2022-08-06 | Fu Xiaojian | 955 views

Implementation of Permutation and Combination Algorithm in Java

Work together to create and grow together This is the 9th day of my participation in the "Nuggets Daily New Plan·August Update Challenge", click to view the details of the event' ' How to implement the permutation and combination algorithm in Java Ou...

2022-08-06 | Programmer Xiao Xu | 372 views

Object-Oriented Programming

1. Overview of the three major characteristics of object-oriented programming (OOP) technology can facilitate the reuse of code in the follow-up, reduce the total amount of code written, and speed up the development progress; disadvantages also exist...

2022-08-06 | The star of the Rainbow | 352 views

Spring AOP

Article directory 1. What is Spring AOP?1 Spring AOP 1 2. Why use AOP?2 AOP 8 3. How to learn Spring AOP 3Spring AOP 23 3.1 AOP composition 31 AOP 28 3.1.1 Aspect 311 Aspect 29 3.1.2 Join Point 312 Join Point 34 3.1.3 Pointcut 313 Pointcut 39 3.1.4 N...

2022-08-06 | classmate pan | 500 views

[Short Answer Questions] JavaWeb must ask 10 short answer questions

1. 1. Talk about the servlet life cycle The life cycle of a servlet is initialization (init), service (service), and destruction (destroy) 1. Initialization (init): When the servlet is accessed for the first time, the init method is called to initial...

2022-08-06 | Tao ran, a classmate | 446 views

Operation and maintenance practice - the latest Nginx binary build and compile lua-nginx-module dynamic link Lua script access Redis database read static resources implicit display

Follow the "WeiyiGeek" official account and set it as "Special Concern", and I will take you through network security operation and maintenance, application development, and IoT learning every day.dream.//bbsmax.ikafan.com/static/L3Byb3h5L2h0dHBzL2lt...

2022-08-06 | bbsmax | 609 views

[Java Interview] This Internet high-frequency interview question stumped 80% of programmers?When does the index expire?

"When will the index fail?" During the interview, a question that came up suddenly, was it a little confusing?It doesn't matter, follow me, don't get lost in the interview.I'm Mic, a Java programmer who has been working for 14 years.There are a lot o...

2022-08-06 | bbsmax | 266 views

Spring Cloud Gateway integrates Nacos and Swagger to aggregate Api documents

Article directory 1. Gateway service gateway Gateway 1 1.1 What is gateway 11 2 1.2 Spring Cloud Gateway 12 Spring Cloud Gateway 9 1.3 Others 13 18 2. Gateway environment and configuration Gateway 24 2.1 pom.xml 21 pomxml 25 2.1.1 gateway 211 gateway...

2022-08-06 | Integer_Double | 752 views

The get/post request tool (apifox/postman/browser) can request through but the java code can't solve the problem

Contents 1. Error description 1 1 2. Code request fails, in most cases 2 8 3. Code request fails, and error 400 is reported (emphasis added) 3400 17 1. The error describes an interface, which can be measured using apifox and postman toolspass; https:...

2022-08-06 | Market durian | 833 views

"Docker Basics: 2. Docker Installation" includes premise description, basic composition of Docker, Docker platform architecture diagram (architecture version), installation steps, Alibaba Cloud image acceleration, eternal HelloWorld, and underlying princi

https://img blog.csdnimg.cn/ae223655038d47588518293b2fb707a8.jpeg pic center Article directoryGraphical entry version 231Docker 64 2.3.2Docker platform architecture Graphical architecture version 232Docker 70 2.4 Installation steps 24 78 2.5 Alibaba ...

2022-08-06 | Big Cat Liu. | 782 views

JavaScript Knowledge Point Review--(2) Advanced Functions

The advanced function is divided into four parts: prototype and prototype chain, execution context and execution context stack, scope and scope chain, closure prototype and prototype chain, prototype, explicit prototype and implicit prototype, protot...

2022-08-06 | Jia Jibao | 873 views

Ubuntu encountered ERROR: configuration failed for package 'rJava' when installing xlsx package

Environment Description Environment: Ubuntu Subsystem R: 4.1.2 install xlsx package in R install.packages 'xlsx', repos = ' ' install package into '/usr/local/lib/R/site library' because 'lib'Not specified yet install dependencies 'rJava', 'xlsxjars'...

2022-08-06 | Fanmengxi | 523 views

Example of using ElasticsearchRestTemplate in SpringBoot, (add, delete, modify, highlight, id, paginate, time range, and multi-condition queries)

Foreword I recently worked on log-related things in the unit, and then some logs were stored in the elasticsearch index library. I slowly found that the index library is really fragrant. The purpose of writing this article is to record the use of Ela...

2022-08-06 | fate strikes fast | 288 views

Openresty+nginx image server configuration, add http_image_filter_module module

Background For simple NGINX configuration image server, please refer to: Nginx image and video server configuration Yin Changqing's blog CSDN blog 'Nginx image and video server configuration Yin Changqing's blog CSDN blog' openresty itself does not h...

2022-08-06 | Yin Changqing | 621 views