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For numbers, transform them into matrix form and extract matrix information It is divided into small blocks. Each block represents whether the position of the number is 1 or 0. The matrix information is extracted through the self coding network [6538] [[0. 0. 0. 0. 1. 1. 1. 1. 0. 0. 0. 0. 1. 1. 1. 1.] [0. 0. 0. 0. 1. 1. 1. 1. 0. 0. 0. 0. 1 ...

No matter when you start, it's important not to stop after you start Three SqlSession s DefaultSqlSession and SqlSessionManager and SqlSessionTemplate are three common sqlsesion s I have From the class diagram, you can see that all three of them have implemented SqlSession, that is, they can all represent a session.Unlike others, SqlSessionM ...

1, Background This paper mainly introduces the implementation of presto with keepalive Experimental environment: CentOS 6 64 bit   2, Experimental steps 1. Software installation Install keepalive package sudo yum install -y keepalived presto deployment and configuration are omitted, assuming that the process has been ...

1. url:  https://weibo.com/ 2. target: Login   3. Analysis. Due to the need to fill in the verification code, this article only analyzes the part of cracking the user name and password encryption, without verification code identification. 3.1 according to the old rule, F12, enter an account password and click login to see what requests have be ...

Recently, an error "error: cannot fetch last explain plan from plan" was encountered. Therefore, the following scenarios were studied for details:     1: When you forget to use EXPLAIN PLAN in front of the SQL statement, and then use select * from table (DBMS? Xplan. Display) to view the execution plan of the specific SQL, you will en ...

background Colleagues described that the database orcl instance will be unable to connect in a period of time. It can be used after one restart. It will be unavailable again in about 30 minutes to an hour. Problem finding and troubleshooting ideas For oracle problems, first check the alert.log log View the alert.log log log ...

1.1.1 Abstract Factory encapsulates the creation of data operation class instance, and then DBSession calls abstract factory to modify DBSession CZBK.ItcastOA.DALFactory data session layer calls data layer can not be directly new, you need to encapsulate decoupling   1.2.1 CZBK.ItcastOA.DALFactory add abstract factory class AbstractFactory 1.2 ...

Java 8 API provides many new functional interfaces to make the work more convenient. Some interfaces are from Google Guava library. Even if you are familiar with these interfaces, it is necessary to see how they are extended to lambda. I. Optional interface 1. Various problems caused by null 1) it is the source of error: NullPointException is t ...

Copyright notice: This is the original article of the blogger. It can't be reproduced without the permission of the blogger. https://blog.csdn.net/qq_26654727/article/details/83473968 Article directory Using java api to create excel content and send email Main functions: Core code (SendMail ...

Watcher is the event monitoring mechanism of zookeeper. Today, let's see what the code of watcher class contains? Watcher Watcher is an interface that defines the process method, which needs to be implemented by a subclass. It represents the method that must be implemented when implementing the watcher interface, that is, defining for processi ...