[CRM learning and development Day1 of SSM framework project customer relationship management system]

1.1 home page function demand When users visit the project home page, they first enter the login page. Timing & flow IndexController @Controller public class IndexController { /* Theoretically, assign a url to the Controller method: http://127.0.0.1:8080/crm/ For simplicity, the protocol: / / ip:port / application ...

Posted by goldfiles on Wed, 25 May 2022 00:07:31 +0300

Getting started with Java se: iterators and comparators

iterator Iterator Syntax format: Iterator it = collection object iterator(); In a collection, simply call the collection object's own iterator() to create an iterator for the collection Three methods in iterators: Boolean hasnext() determines whether there are elements in the next bit of the current cursor. If there are elements, it returns ...

Posted by aviavi on Tue, 24 May 2022 21:32:20 +0300

Collection of Java learning

Collection of Java learning 0x00 Preface In fact, the common classes in the previous article have already talked about the ArrayList collection, but ArrayList is only one of the collections. This article will talk about some objects of the collection. 0x01 set concept Let's first understand what a set is, Let's post a description of the collect ...

Posted by samsunnyuk on Tue, 24 May 2022 20:40:44 +0300

Using Baidu map open source code to realize positioning and real-time path tracking

First demonstrate the effect: (the video can't be played, and the pictures make up the number) Ideas and steps of real-time path: Idea: if you need to realize real-time tracking on the map, you first need to realize the positioning function. On the basis of realizing the positioning function, you need to draw the walking track on the map, ...

Posted by realnsleo on Tue, 24 May 2022 20:03:34 +0300

JAVA notes (object oriented)

Java object oriented and process oriented Both procedure oriented and object oriented (OO) are ideas for software analysis, design and development. They guide people to analyze, design and develop software in different ways. In the early stage, there was the thought of process oriented. With the expansion of software scale and the improvement ...

Posted by kevin777 on Tue, 24 May 2022 19:51:36 +0300

Java annotation and reflection mechanism

1. Notes 1.1 introduction to notes Annotation is a new technology introduced by JDK 5.0. Its main functions are: Explain the procedure and it is not a procedure itself (this function is the same as that of annotation); It can be read by other programs (such as compiler, etc.). Annotation format: annotations exist in the code in the format o ...

Posted by lip9000 on Tue, 24 May 2022 19:24:08 +0300

Simple application and understanding of spring cloud hystrix

preface hystrix is a well-known service degradation and fusing component launched by Netflix The main principle of hystrix design is to solve the cascading failure of associated services caused by network uncertainty in distributed environment. For example, service A calls service B, service B calls Service C, and Service C calls service D. d ...

Posted by inerte on Tue, 24 May 2022 18:30:07 +0300

Source code analysis of nacos service registration

Yesterday, I analyzed the source code analysis of nacos dynamic configuration. Today, let's take a look at the relevant source code of nacos service registration.1, Principle of registryThe principles of common service registries are generally the same, as follows:Service registration process of nacos:2, Client registration service source codeT ...

Posted by primefalcon on Tue, 24 May 2022 18:08:25 +0300

It takes only 4 seconds to export 20w pieces of data from the system report page to the local. How do I do it

background Recently, a younger student came to me and described the following scenes to me: There are many reports on their company's internal management system. The report data are displayed in pages, and the browsing speed is OK. However, when each report exports data with a slightly larger time window, it is extremely slow. Sometimes, heap o ...

Posted by warpdesign on Tue, 24 May 2022 16:39:38 +0300

The most complete tutorial on building MAVEN private server, uploading and using JAR package in history

Recently, dubbo has been used as a project to make frequent RPC calls with third parties. If the other party changes the interface parameters or adds an interface, all developers in the background need to type the jar package provided by the third party into a pom file and introduce it into the local environment. Very tired!!! Today, let's sh ...

Posted by agent007 on Tue, 24 May 2022 15:23:45 +0300