Tag：Permit
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Time：2020-12-3
Problems encountered When using the repository interface, a null pointer exception will be reported if the query result of findby method is nulljava.lang.NullPointerExceptionWhen the query result is not empty, it can pass the test. This article first appeared in my personal blog technology mansion（ wcc.im ）Problems encountered when spring data JPA query result is null […]
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Time：2020-11-30
As early as the GitHub universal conference in 2019, GitHub officially announced that they were about to launch mobile app. Recently, GitHub app has finally come out. As the most popular same-sex dating website in the world, after its release, it is natural to be a big fan, but in addition, many developers have proposed […]
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Time：2020-10-28
Technical editor: Xu Jiuyi from si no office On May 22, 2020, the opencv Technical Committee proposed in a meeting that the authorization agreement should be changed from BSD to Apache license 2. Compared with BSD, Apache license 2 is a more standard and detailed open source protocol. What is the change of agreement? For […]
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Time：2020-10-27
preface Recently, I learned about the cross platform solution based on the app that wants to implement a common set of personal functions. And then began the study of flutter, through the article to record the harvest of learning. The main content of this article is to introduce the mode of state management and the […]
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Time：2020-9-27
Origin and development of open source In 2019, Qiu yuepeng, vice president of Tencent and President of Tencent cloud, said that open source is the general trend of technology development. Tencent cloud is the initiator of many open source projects and an important contributor and contributor to the open source community. After that, Jia Yangqing, […]
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Time：2020-9-14
This paper tells you how to install dotnet SDK on UOS domestic system The UOS used is UOS 20 x64. This system version is based on Debian 10 and can be installed by Debian 10 Enter the UOS system, click the icon in the lower left corner, which is equivalent to the windows start button, […]
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Time：2020-9-12
This article tells you how to install MonoDevelop development tools on UOS. The UOS used in this paper is UOS 20 x64, which is based on Debian 10. The default MonoDevelop development tool does not provide UOS version, but provides Debian 10 version Manual installation of MonoDevelop is not reliable, this article recommends that you […]
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Time：2020-9-11
Let’s start with a hello world application and try the drag control development like the old WinForms After creating a GTK ා 2.0 application, we can try to start the development of drag control. Of course, the application interface developed by this development method is a bit old. But it’s good for fun First drag […]
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Time：2020-9-10
This article tells you how to use MonoDevelop on UOS domestic system, and enter the first step of interface development by creating GTK ා application Before you start, you need to install MonoDevelop tools After installation, you can find the MonoDevelop tool in the start menu After opening, click new project Select the new GTK […]
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Time：2020-8-21
This paper is from the speech delivered by Zhang Yifeng, President of China Banknote blockchain Technology Research Institute, at the first fintech day blockchain sub forum of Weizhong bank, with the title of “blockchain and distributed identity“. Zhang Yifeng proposed that the open license chain (public alliance chain) is the path choice to promote […]
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Time：2020-7-31
IPFs and filecoin: from introduction to mastery After contacting with IPFs, I am very interested in this protocol which can change the distribution mechanism of network data in essence. However, there are no books on IPFs in China, and some materials have brought some learning difficulties to many IPFs enthusiasts because of English, not only […]
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Time：2020-6-6
The website that does not apply HTTPS encryption is basically a streaking. Come on, get started My system is CentOS 6 Step 1: install certbot Certbot can be used to manage (request, update, configure, revoke, delete, etc.) let’s encrypt certificates. Certbot with nginx plug-in is installed here: wget https://dl.eff.org/certbot-autosudo mv certbot-auto /usr/local/bin/certbot-autosudo chown root /usr/local/bin/certbot-autosudo […]
