Realization of mail transmission in physical isolation environment based on james

background In order to protect the network security of high security level, the State Security Bureau issued the physical isolation requirements for the classified network on December 27, 1999, and promulgated and implemented the regulations on the confidentiality management of the international networking of computer information system on Jan ...

Posted by sith717 on Fri, 21 Feb 2020 04:40:10 -0800

Java language introduction ๐ž“œ 02 | object oriented and common class ๐ž“œ day10 | interface, polymorphic

Chapter I interface 1.1 Interface Overview and life examples Interface is a common standard As long as it conforms to the standard, it can be used by all 1.2 basic format of interface definition Interface is a kind of reference data type, and the most important content is abstract method. D ...

Posted by nikes90 on Fri, 21 Feb 2020 04:08:02 -0800

Exception mechanism (exception classification and handling, getMessage,printStackTrace)

(all screenshots in the figure, as well as data notes, come from the power node, for self-study and use) 1. What is the exception? First, abnormal simulation is "abnormal" events in the real world Second, in java, exceptions are simulated by means of "classes" Exception description u ...

Posted by lixid on Fri, 21 Feb 2020 02:58:19 -0800

Breakthrough CRUD universal tree tool class encapsulation

0. You may be able to gain after learning this article Experience the process of gradual optimization and perfection of a tree tool from the beginning Design and implementation of tree tool package Finally, we get a ready to use tree tool source code Students who have some knowledge and use of the front-end tree components can dir ...

Posted by ale8oneboy on Fri, 21 Feb 2020 02:26:49 -0800

Python 3-cookbook notes: Chapter 3 digital date and time

Each section of Python 3-cookbook discusses the optimal solution of Python 3 in a certain kind of problem by three parts: problem, solution and discussion, or how to better use the data structure, function, class and other features of Python 3 in a certain kind of problem. This book is of great help to deepen the understanding of Python 3 and i ...

Posted by Steve Angelis on Fri, 21 Feb 2020 01:52:28 -0800

Zhou Zhihua's watermelon Book 3.4 Python code

Select data setMammary cancer Programming references:For the breast cancer data setData set partition methodAnswer to others Write your own code is mainly familiar with how to transfer packets, practice hands first. I wrote the code of breast cancer and found two problems: 1.10-fold CV can't compare wit ...

Posted by phonydream on Thu, 20 Feb 2020 02:06:59 -0800

Dubbo load balancing: implementation analysis of consistency Hash

Author: FserSuN Source: https://blog.csdn.net/Revivedsun/article/details/71022871 LoadBalance is responsible for selecting a specific Invoker from multiple invokers for this call to share the pressure. The LoadBalance structure in Dubbo is shown in the figure below. com.alibaba.dubbo.rpc.cluster.LoadBalance Interface provides <T> Invoke ...

Posted by hesyar on Thu, 20 Feb 2020 00:41:19 -0800

Spring boot 2. X Foundation: packaging applications as executable jars

Knowledge changes fate, rolling code makes me happy, and I will continue to swim in the open source industry in 2020 < br / > Take a look at what you like and get into the habit < br / > Give me a Star, Click to learn about the implementation solution of component-based interface service based on spring boot After the application ...

Posted by khanuja.sunpreet on Thu, 20 Feb 2020 00:12:35 -0800

Asynchronous thread pool usage specification

brief introduction spring The interface class of asynchronous thread pool, whose essence is Java.util.concurrent.Executor Spring has implemented exception thread pool: 1. SimpleAsyncTaskExecutor: it is not a real thread pool. This class does not reuse threads. Each call will create a new thread. ย  2. SyncTaskExecutor: this class does not ...

Posted by angel1987 on Wed, 19 Feb 2020 20:08:32 -0800

Python advanced: data visualization with Matplotlib

brief introduction When editing CSDN, the picture is easy to be missing. You can pay attention to "lazy programming" to get a better reading experience. Next, we use Matplotlib to visualize data. First, we continue to use Matplotlib to draw images. The official account can reply to data2 to ...

Posted by netman182 on Wed, 19 Feb 2020 18:53:39 -0800