Tag：Jurisdiction
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Time：2020-7-14
The origin is a question 1: if your umask is set to 022, the default permissions for the file you create are? This reminds me of another question that I was asked about, 2: 777, what is the authority? User group description -rwxrw-r‐-1 root root 1213 Feb 2 09:39 abc The first character represents file […]
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Time：2020-7-14
Variables in child parent class: If a non private member variable with the same name appears in the child parent class, Subclass access to the variables in this class, using this To access the variable with the same name of the parent class, use super The use of super is almost the same as this, […]
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Time：2020-7-13
Write it at the front About spring security The authentication and authority module of web system is also the infrastructure of a system. Almost any Internet service will involve this requirement. In the field of Java EE, mature security framework solutions generally include Apache Shiro and spring security. Apache Shiro is simple and easy to […]
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Time：2020-7-13
MySQL learning — managing user rights Absrtact: This paper mainly studies the method of using DCL statement to manage user rights. Understanding user rights What is a user Users refer to the people who operate and use MySQL database. Using MySQL database requires users to connect through user name and password before operation. Different users […]
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Time：2020-7-13
1.Model management: web online process designer, preview process XML, export XML, deploy process 2.Process management: import and export process resource file, view flow chart, reflect process model according to process instance, and activate pending 3.Process in operation: view process information, current task node, current flow chart, void pause process, assign to do person 4.The process […]
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Time：2020-7-9
1、 Introduction of mongodb user authentication mechanism In order to authenticate the client, you must add a corresponding user to mongodb. The basic steps are as follows: User management interface: db.createUser The () method can create a user. After adding a user, the user can be assigned a role. The first user must be an […]
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Time：2020-7-8
1. Download MySQL 5.7 image docker pull mysql:5.7 2. Create the MySQL container and start it docker run -d -p 3306:3306 -e MYSQL_USER=”ppx” -e MYSQL_PASSWORD=”123456″ -e MYSQL_ROOT_PASSWORD=”123456″ –name mysqltest1 mysql:5.7 –character-set-server=utf8 –collation-server=utf8_general_ci The above parameters are explained -e MYSQL_ User =: set user name -e MYSQL_ Password =: set the password of this user -e […]
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Time：2020-7-7
Nexus learning 1. Installation and start-up Download address start-up ./nexus start configuration file Nexus has two directories Nexus-3.21.1-01 installation Sonatype work data file Please refer to the official documentation for the role of each configuration file in each directory In nexus.vmoptions Modify the JVM parameters of the local startup in nexus- default.properties Modify the port […]
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Time：2020-7-7
Recently, some users of computers have reported that their computers have experienced the problem of adjusting the right-click menu options in win8 system. I believe most people have experienced this problem. Not all friends know how to solve the problem of right-click menu options in win8 system adjustment files. For the problem of right-click menu […]
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Time：2020-7-7
1. Use invalid metadata less and refresh table as much as possible_ NAME;2、set APPX_ COUNT_ Distinct = true is the same as NDV function, both of which are just estimates Multiple aggregate functions in one query that impala SQL does not support use distinct For example: select count (distinct ID), count (distinct uid) from table; […]
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Time：2020-7-7
Write it at the front MySQL is a magic relational database. I really feel that it is powerful. Because the projects are complex and I have encountered Oracle database before, I have the impression that Oracle is very cumbersome and has a lot of configuration. If it is used in small projects, it feels like […]
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Time：2020-7-6
ASP.NET CoreBased onJWTCertification (2) Last time we were rightJwtSome of the basic knowledge of a simple introduction, this section we will explain in detail, this time we will introduce in detailJwtIn.Net CoreOn the actual use of. Environmental Science .Net Core 2.2 Visual Studio 2017 ASP.NET Core WebAPI2 In the last article, we introduced in detailJWTThis […]
