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Ajax Ajax concepts Ajax(Asynchronous JavaScript and XML): asynchronous JavaScript and XML effect Using Ajax, the page can be updated without refresh, the page can be submitted asynchronously, and the user experience can be improved essence Use a special object (XMLHttpRequest) provided by the browser to send a request to the server asynch ...

Ajax A way of calling background interface on Web page JQuery provides the corresponding usage, $ ajax({content}); Add the jQuery package first. The content part is a JS object. $.ajax({ type:'get', //Request type: get - > call doget(), post - > call dopost(); data:req, //The data sent is req; url:'queryAll', //Interfa ...

Apollo project practice 1 Apollo application Project address: https://github.com/ctripcorp/apollo Instruction manual: https://github.com/ctripcorp/apollo/wiki 1.1 first acquaintance with Apollo Apollo (Apollo) is a distributed configuration center developed by Ctrip framework department. It can centrally manage the configuration of di ...

catalogue 1, Introduction to leaky bucket and token bucket 2, Redis + lua script + token bucket algorithm to realize current limiting control 1. Customize an annotation to label the current limiting method 2. Write lua script 3. Read lua script 4. Create an interceptor to intercept the method with this annotation 5. Register this interce ...

The author is a recent intern. The following code is the biggest optimization of current understanding ability. I hope it will be helpful to you; Compared with quick sort and heap sort, the author gives priority to recommend readers to use heap sort, because the code complexity of heap sort is fixed, and the more the number to be sorted, the mo ...

✏️ Object oriented content core in Java: EncapsulationInheritancePolymorphism encapsulation ❓ What is encapsulation? I wonder if you robbed the remote control of the TV when you were a child? The remote control is the result of packaging. It's a simple way to pack everything in a black box. Similarly, switch to Java. Since Java is ...

catalogue 1, What's going on at the bottom of IO? 2, Sort out the structure of classes 3, IO big point 4, Demonstration of incoming wave examples Summary: Click like and watch again, form the habit of praise, search on wechat [coriander Chat Game] and pay attention to me. preface: Some big guys in the group said they wanted me to write ...

Hello, I'm looking at the mountain. Java 8 introduces a particularly interesting class: Optional, a tool that makes it easier for us to avoid NPE (null pointer exception). A long time ago, in order to avoid NPE, we wrote a lot of code similar to if (obj! = null) {}. Sometimes if we forget to write, NPE may occur and cause online failure. In ...

1, Agent mode ①. concept For some reason, an object needs to be provided with a proxy to control access to the object. At this time, the access object is not suitable or cannot directly reference the target object. The proxy object acts as the intermediary between the access object and the target object ②. structure Abstract Subject c ...

AQS detailed explanation and source code analysis 1. General What is AQS? The full name is AbstractQueuedSynchronizer, which is an abstract class in JDK. First, let's look at the classes that inherit it: Basically, all classes in JUC concurrent packages are related to it. AQS is a heavyweight basic framework used to build locks or other sy ...