Programming VIP

1. Introduction The gateway is the common entrance for all requests, so the current can be limited in the gateway, and there are many ways to limit the current. The current limit of the gateway is realized through sentinel component. Sentinel supports current limiting for spring cloud gateway, Zuul and other mainstream gateways. The curre ...

1 case 1 - automatic login 1.1 requirements and process introduction When the user directly accesses the login page (e.g. shopping cart page, order page, etc.), the user object of the last login is directly displayed. This function is the function of automatic login. If the user did not check auto login when logging in last time, the user wil ...

I Introduction to serializer 1. Serialization and deserialization in Python Serialization: converting objects in Python to strings in XML formatDeserialization: convert a string in Python format into an object in Python 2. Function of serializer Serialization, the serializer will convert the model object into a dictionary, and then into a j ...

1, Virtual DOM: The labels written in the template in the vue file are all templates, which must be processed into virtual DOM objects by vue before they can be rendered and displayed on the real DOM page 2, diff algorithm: used to compare the new virtual DOM with the old virtual dom 1. Root element change → delete and rebuild DOM tree 2 ...

filter ◼ Filter s can dynamically intercept requests and responses. ◼ Application scenario: filter sensitive words, prevent SQL injection, set character encoding, and perform URL level Other permissions, access control, compression response information, etc. Filter programming step 1: create a filter class ◼ Write a Java class to imp ...

JSP jsp file unified character encoding Set the encoding of jsp file (pageEncoding attribute in jsp file): jsp -- java Set the encoding for browsing and reading jsp files (content attribute in jsp files) Generally, the above codes are set to be consistent. It is recommended to use: utf-8 Deploy tomcat On the Servers panel, first create a ...

Why use filters What are the problems we have encountered in our current writing project? A. The advantage of baseServlet currently used is that it is convenient to handle garbled code uniformly. However, if we do not use servlet in the future, we need to write in each servlet when dealing with Chinese garbled code, but it is more trouble ...

I introduce (1) It comes from the interface under Servlet specification and exists in Servlet API in Tomcat Jar package (2) The developer is responsible for providing the Filter interface implementation class, but the Http server is not responsible for providing it (3) The Filter interface intercepts the Http server before calling the reso ...

Array has many instance methods. Some methods will not change the existing array, but return a new array, and some methods will change the original array. The methods listed in this article are all extracted from real cases of specific projects. 1. forEach Execute the given function once for each element of the array without changing the origi ...

Project type: JAVA WEB project User type: administrator + ordinary user Main technology: Jsp+Servlet+MySQL+Tomcat Front end html+css Style: LayUI is used Development tool: Eclipse (configuration information is required for Idea import) Corresponding environment introduction: jdk1 8 + MySQL 5.7 + Tomcat (MySQL connector 8.0.jar needs to be repla ...