Programmer Group

In some important information notification scenarios, users need to receive and pay attention to the information. The synchronous push of SMS + voice notification can solve this problem. SMS notification + voice notification of the same content are sent synchronously Push the voice notification of the same content synchronously while pushing ...

catalogue 1, Listener introduction Listener introduction What is a listener Related concepts of monitoring mechanism           Introduction to web listener 2, Listen to the lifecycle of domain objects Implementation steps 1. Create a listener and implement the listener interface 2. Add listener information 3 ...

1._JSP 1.1._ What is JSP JSP (Java Server Pages) is a dynamic resource on the Java Web server side. It plays the same role as HTML pages, displaying data and obtaining data. 1.2._jsp composition JSP = HTML + Javascript + JSP action tag (including EL expression) 1.3._jsp script It's essentially Java code snippets Classificatio ...

Servlet realizes login function Title: Create a project, use servlet a to complete a login page, and when the user enters the user name and password on the login page, send it to servlet B, After servlet B obtains the user name and password, it creates a correct user name and password in the Web.xml file as shared static data in advance Se ...

1. What is JSP? JSP, the full name of Java Server Pages, is a dynamic web page development technology. It uses JSP tags to insert Java code into HTML web pages. Labels usually start with <% and end with% >. JSP is a Java servlet, which is mainly used to realize the user interface part of Java web application. Web developers write JSPS b ...

Seven action instructions of JSP JSP action instructions are mainly a group of dynamically executed instructions, which are used in the form of tags. Different from compiling commands, action instructions are action scripts at runtime. The seven action instructions of JSP are as follows: jsp:forward performs page steering and forwards the proc ...

1, JSP: 1. Instruction (1) function: Used to configure JSP pages and import resource files (2) format: <% @ instruction name attribute name 1 = attribute value 1 attribute name 2 = attribute value 2...% > (3) classification: ① page: configure the of JSP pages contentType: equivalent to response.setContentType() 1. Set the mime typ ...

1, Conversation Technology 1. Concept A session contains multiple requests and responses. One session: The browser sends a request to the server resource for the first time, and the session is established until one party disconnects 2. Functions: Data is shared between multiple requests within the scope of a session 3. Method: Clien ...

JavaWeb (medium) Cookie s and sessions 1. Conversation Session: users open a browser, click many hyperlinks, access multiple web resources, and close the browser. This process can be called session; Stateful conversation: when a classmate comes to the classroom next time, we will know that the classmate has been here, which is called st ...

1, JSP JSP is a special file format. It can embed Java code in html, but it is essentially a subclass of Servlet JSP execution process: The browser requests JSP from the server - > the server finds the corresponding JSP file - > translates it into Java code and compiles it for execution - > returns the execution result to the se ...