The main contents of this chapter:With previous learning, we learned and quickly completed the first spring boot application. Spring Boot Enterprise Framework, then how does spring boot read static resources? such as JS folder, CSS files and png/jpg
Spring Interceptor Brief introduction to common application scenarios1, log records: Log the request information for information monitoring, information statistics, calculation of PV (Page View) and so on.2, permission check: such as login detection,
ObjectiveA time ago, a Webhook project was created using Springboot, and as a result of recent projects, a number of springboot related projects were used, while the weekend was configured to use Prometheus to monitor micro-service
As a result of working with Java and C # Web development, the typical use of the framework is spring MVC3 and MVC3
The following individuals use the code snippet to compare the differences between the two frames. The following: s represents
It took many days to do this function and never found the right implementation. Know to use interceptors, but have been struggling to pass the address of the previous page.
There are methods to use the session, but recorded in the session, in the
This article mainly introduces the SPRINGMVC interceptor, specifically as follows:
1.DispatcherServlet
SPRINGMVC has a unified entrance Dispatcherservlet, all requests are through Dispatcherservlet.
Dispatcherservlet is the predecessor controller,
a phenomenonSystem Admin Login
Login to Vendor Admin user under same browser
Because the top menu bar is present in session, when browsing the previous system administrator interface, click the menu option to get the menu bar content from the
One: theoretical preparation
Interceptor : The Interceptor is a component that spring MVC provides, which can be executed after the client requests execution, and then logically processed after execution, similar to filter filters in the
In the previous analysis of Dispatcherservlet, how to deal with the request after the beginning, this article will focus on the analysis, handlermapping and handleradapter how to work
In the process of launching the Web container, the classes
React cross-domain access to the background, the default is a cross-domain problem, and the fire arc and Google Browser, the cross-domain problem display is not the same.
Google browser such as:
The status here is 200, but there is no information
Handler related instructions:New Handler, it's bound to the thread/message queue of the thread that's creating it-- forSimilarly, there is a class:Android.osclass Handlerthreadclass for new thread that has a looper. The looper can then is used to
When you see this article to believe that you should now encounter such a problem, I also encountered the later found a solution to record, if the next encounter can be directly resolved.As for why this is happening, you can read this article: https:
The difference between filters and interceptors: ① interceptors are based on the reflection mechanism of Java, and filters are based on function callbacks.The ② interceptor is not dependent on the servlet container, and the filter relies on the
1.DispatcherServletSPRINGMVC has a unified portal Dispatcherservlet, all requests are through Dispatcherservlet.The Dispatcherservlet is the predecessor controller, which is configured in the Web. xml file. Interception of matching requests,
Spring MVC's usual execution process is when a Web request is sent to the spring MVC Application,dispatcher servlet to receive this request, and the controller is found through handlermapping. Delegate this request to a controller's handler method
Prevent forms from repeating commitsThis article describes the use of redirect technology to prevent form submissions, but redirect does not resolve to back to form pages when repeating the form, in order to solve this problem, added token mechanism.
The implementation of the Handlerinterceptor interface is used in this article1. Custom Interceptors:/*** interception Device*/ Public classCustomerinterceptorImplementshandlerinterceptor{/*** The Handlerinterceptor interface defines three methods *
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