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Servlet, features and lifecycle Servlet is a server-side application written by Java classes. It is usually a program running on the server side. You can call one by opening the browser. It can be regarded as an intermediate layer between the client and the server, which is responsible for receiving and requesting the response of the cl ...

Blog system The front page is based on html+css+js The back-end implementation is based on servlet +themthefe 1. Demand analysis Before software development, first analyze the requirements. Understand what needs to be achieved Functions to be realized by blog system: 1. Be able to display the current blog list Blog list page, showing a lo ...

HttpServletRequest class What is the role of the HttpServletRequest class Every time a Request enters the Tomcat server, the Tomcat server parses and encapsulates the requested HTTP protocol information into the Request object. Then it is passed to the service methods (doGet and doPost) for us to use. We can get the information of all request ...

1, Basic syntax of EL expression    1.EL expression syntax is very simple. It starts with "${" and ends with "}". The middle is a legal expression. The specific syntax format is as follows: ${expression}    expression: used to specify the content to be output. It can be a string or an expression c ...

Introduction to Servlet foundation of JavaWeb detailed explanation (Part I) 1. Overview of Serlvet      Servlet is a java program running on the web server or application server. It is an intermediate layer responsible for connecting applications from web browsers or other HTTP clients and HTTP servers. It is a technology provi ...

In the process of learning Servlet Technology, many common objects need to be used, and their usage is also very important. Here we first introduce the first common object, ServletConfig. summary 1. In the Servlet configuration file, you can use one or more < init param > tags to configure some initialization parameters for the Servl ...