What is the role of Serverlet in Java

Layui login page jump setting steps: Add jump code: Add judgment in the login form submit button click event, and jump to the specified page through window.location.href after successful login. Modify the form configuration: add a hidden input field to the form element of lay-filter="login", with the name "redirect" and the value being the target page address.

layui provides a variety of methods for obtaining form data, including directly obtaining all field data of the form, obtaining the value of a single form element, using the formAPI.getVal() method to obtain the specified field value, serializing the form data and using it as an AJAX request parameter, and listening Form submission event gets data.

There are the following methods for front-end and back-end interaction using layui: $.ajax method: Simplify asynchronous HTTP requests. Custom request object: allows sending custom requests. Form control: handles form submission and data validation. Upload control: easily implement file upload.

Servlet serves as a bridge for client-server communication in Java Web applications and is responsible for: processing client requests; generating HTTP responses; dynamically generating Web content; responding to customer interactions; managing HTTP session state; and providing security protection.

In Vue.js, event is a native JavaScript event triggered by the browser, while $event is a Vue-specific abstract event object used in Vue components. It is generally more convenient to use $event because it is formatted and enhanced to support data binding. Use event when you need to access specific functionality of the native event object.

Steps to build a single-page application (SPA) using PHP: Create a PHP file and load Vue.js. Define a Vue instance and create an HTML interface containing text input and output text. Create a JavaScript framework file containing Vue components. Include JavaScript framework files into PHP files.

JavaServlet can be used for: 1. Dynamic content generation; 2. Data access and processing; 3. Form processing; 4. File upload; 5. Session management; 6. Filter. Example: Create a FormSubmitServlet to handle form submission, taking name and email as parameters, and redirecting to success.jsp.

Vue.js event modifiers are used to add specific behaviors, including: preventing default behavior (.prevent) stopping event bubbling (.stop) one-time event (.once) capturing event (.capture) passive event listening (.passive) Adaptive modifier (.self)Key modifier (.key)