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Reprinted from: https://blog.csdn.net/iku5200/article/details/82856621 IDE: idea,DB: mysql Create a new Spring Initializr project Create the file structure of the project and the version of the jdk Select the dependencies required by the project Modify the project name and finish Take a look at the pom.xml after it is built ...

summary This blog post mainly discusses the following contents: SessionCookieFile upload and download Session session management HTTP protocol is a stateless protocol Session: a session is an uninterrupted sequence of requests and responses between a client and a server. Using the HttpSession object Create or return the session object ...

  1 New ASP.NET Core MVC Application 1.1 New MVC Application Open Visual Studio 2017, create a new   ASP.NET Web Application, select   MVC (Model View Controller).     1.2 Introducing NuGet Package   Need to be introduced   microsoft.EntityFrameworkCore Microsoft.EntityFrameworkCore.Sqlite   Introducing tutori ...

1. View the current user's home directory # Switch to Home Directorycd ~# View Home Directory Location pwd 2. Check whether the server is maliciously logged on # Ubuntu # 1. View recent successful password logins: grep "password" /var/log/auth.log | grep -v Failed | grep -v Invalid # 2. View recent login failures IP And each IP Number of fa ...

1. nullptr and std::nullptr_t C++11 allows you to use nullptr instead of 0 or NULL This new feature especially helps you avoid misunderstandings when "NULL pointer is interpreted as an integer value" nullptr is a new keyword that is automatically converted to various pointer types but will not be converted to any integer type For ex ...

1. Arithmetic operator 1.1 introduction to operators The symbol used to splice variables or constants is called: operator, and the formula connected by operators is called: expression. We often use it in practical development For example: 10 + 3 is an expression, and the + sign is an operator Note: in Scala, operators are not only operator ...

1, Overview of Map collections Map collection overview and usage ● Map set is a double column set, and each element contains two data. ● format of each element in the Map set: key=value (key value pair element). ● the Map set is called "key value pair set".   Overall format of Map collection ● format of Collection set: [element 1, ele ...

SpringMvc - file upload and download File download using ResponseEntity First, create a directory under the webapp directory to store the content to be downloaded. First, casually put in a picture Then, open maven management, find lifecycle -- > > package, and double-click to repackage. Package the directory just created into the packa ...

Process control Create process fork //Create child process pid_t fork(void); //Success: the parent process returns the PID of the child process, and the child process returns 0; Failure: Return - 1, set errno value The parent-child process who preempts the CPU time slice will execute first Global variables cannot be shared between p ...

Interview question: please explain the principle of vue2 response vue official statement: cn.vuejs.org/v2/guide/re... The ultimate goal of responsive data is to run some functions when the object itself or object properties change, the most common being the render function. In the specific implementation, vue uses several core compone ...