Minimal Python syntax

7. Using regular expressions in Python 7.1 regular expression When dealing with strings, we often use the need to find strings that meet some complex rules. Regular expressions are tools for describing these rules. Regular expressions are the code used to record text rules. 7.1.1 line locator The ...

Posted by philipolson on Sat, 13 Jun 2020 04:41:18 -0700

Filter and Listener related learning notes

Filter: filter concept When accessing the resources of the server, the filter can intercept the request and complete some special functions. Generally used to complete general operations. (such as login authentication, unified encoding, sensitive character filtering...) step Define a class to imp ...

Posted by RClapham on Fri, 12 Jun 2020 22:09:52 -0700

J2EE knowledge summary

J2EE knowledge summary 1, DTD 1. Why DTD? 2. What is DTD? 3. Where is DTD used? 4. How to use DTD? 5. Example explanation 2, XML 1. Why XML? 2. What is XML? 3. Where is XML used? 4. How is XML used (XML modeling)? 5. Example explanation 3, Reflex 1. Why reflection? 2. What is reflex? 3. Where is ...

Posted by esthera on Wed, 10 Jun 2020 22:54:42 -0700

[hard study] Java notes 0.7

Java notes One of the object-oriented features: encapsulation and hiding Four access modifiers Member 3 of class: constructor (constructor) Constructor Overload Keywords - this JavaBean One of the object-oriented features: encapsulation and hiding The user's direct operation on the properties ...

Posted by terje-s on Tue, 09 Jun 2020 21:11:26 -0700

[Nginx] basic concept and installation

1, Basic concept of Nginx 1. About Nginx What is Nginx Nginx (engine x) is a high-performance HTTP and reverse proxy server, characterized by less memory consumption and strong concurrency. It has been reported that it can support up to 50000 concurrent connections 2. Reverse proxy Forward agent The forward proxy is a kind of client proxy. The ...

Posted by subcool on Sun, 07 Jun 2020 03:09:57 -0700

Read and understand Filter filter

Filter filter What is a Filter Use of Filter Filter lifecycle FilterConfig class FilterChain filter chain Interception path of Filter What is a Filter 1.Filter filter is one of the three components of javaWeb. Servlet program, Listener listener, filter filter 2. It is an interface 3. Function: f ...

Posted by dandaman2007 on Sat, 06 Jun 2020 23:30:08 -0700

Details of Struts2 configuration

1. Execution process chart of struts 2 The whole implementation process is divided into two parts: 1. Server start - > initialization filter - > Load struts.xml 2. Browser send request - > filter - > struts.xml Find action class name in - > instantiate action class The action class w ...

Posted by Ju-Pao on Fri, 05 Jun 2020 02:32:41 -0700

Spring MVC advanced - how to use interceptors correctly? Case explanation

Spring MVC: interceptor Implemented the HandlerInterceptor interface. Function: used to intercept the controller   2, Define an interceptor 1. Environment construction @Component public class Demo1Interceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, ...

Posted by emma57573 on Wed, 20 May 2020 23:03:42 -0700

Deploy multiple projects in Tomcat, and configure the process of secondary domain name through Nginx reverse agent

Purchase domain name. Example: example.com Set multiple secondary domain names. As shown in the figure:   To configure the tomcat file: Modify the server.xml File: The following configuration configures three containers with three different ports. Please note three points: ① port number: Connector port; ② container name: portservice ...

Posted by kenchucky on Sun, 17 May 2020 08:11:31 -0700

Summary of jvm learning [past and present life of a class]

1 I am Queen of the Jing King of Zhongshan Hello, my name is Li Dahammer, and I am an unrivalled actor. I am about to participate in a stage play called The Romance of the Three Kingdoms, directed by Mr. Luo Guanzhong, an old man whose coffin cannot be pressed down.And I, Uncle Liu, who is about to play one of the three leading characters, hey ...

Posted by Pasa Mike on Thu, 07 May 2020 10:20:05 -0700