Programmer Group

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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, ...

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 ...

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 ...