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Complex source code (end of article) catalogue Official account number and setting   Explanation of each configuration Interface configuration information JS interface security domain name Test number QR code Template message interface How to get the user's openid Get the basic information explanation of Web authorized users doma ...

Complex functions should be disassembled into relatively simple functions, which is easy to develop web projects can split functionality on request Click the registration button to jump to the registration page, which is a request; Submit the registration information to the server, and the server will send an activation email, which is a reque ...

Author: slow timeSource: cnblogs.com/Tom-shushu/p/14279357.html 1, Preface The export and import of Excel and PDF is a problem we often encounter in our work. Just today, the company's business encountered this problem. By the way, take a note to prevent the same problem from being helpless next time. The company has two needs: Requirement ...

HTTP protocol Chapter 1 Introduction to HTTP protocol [the external chain image transfer fails. The source station may have an anti-theft chain mechanism. It is recommended to save the image and upload it directly (img-grbtid56-1637415789041) (Shang Silicon Valley Zhang Chunsheng _httpprotocol. assets/timg.jpg)] HTTP hypertext transfer ...

next Source code analysis and detail control of Java executing windows commands (preliminary preparation for developing "Java command executor")_ Jiangnan liquor cooking blog - CSDN blog Say: 1. In Linux systems, there is no / c and / k, only one  / bin/bash -c it and direct  / The difference between bin/bash is that the &q ...

1, Background introduction There are many split services in the distributed system. In the process of continuous iterative upgrading, the following common thorny situations will occur: For the version upgrade of a technical component, depending on the package upgrade leads to the expiration of some syntax or API, or the component fixes urgent ...

Source: https://zhenbianshu.github.io/ Some time ago, our service encountered a performance bottleneck. Due to the urgent demand in the early stage, we didn't pay attention to the optimization in this regard. It's very painful to pay off the technical debt. Under very low QPS pressure, the server load can reach 10-20, the CPU utilization rate ...

If Hadoop has not been configured, you can click the link to see how to configure it Basic technical teaching and practical development teaching of major technologies (under continuous updating ··················&middo ...

In the process of developing applications, the ideal state is not to have errors. Even if errors occur, they should be detected during compilation. However, in reality, errors will occur from time to time when the program runs, which will not be expected. If ignored, it will lead to program crash.In C language, the program will indicate the err ...

preface Entity bean conversion is often inevitable. From the copyProperties of BeanUtil using traditional reflection technology to Object mapping, it basically stops at the dynamic compilation and generation of bytecode using annotation processor. Because it is a set/get calling code generated automatically during compilation, its performance ...