struts2 interceptor

Method one uses the httpsession that the servlet comes withNote the point: httpsession should be used as a parameter of the method //log in public boolean customerlogin (HttpSession　　　　httpSession) { Httpsession.setattribute ( " customer " } // Exit Public String customerout (HttpSession HttpSession) { httpsession.removeattribute ( "Customer"); return"Login"; }Method Two: Use Spring's @sessionattributes ("Logincustomer") / /log in @Controller @SessionAttri

the difference and use of Java Web Filter and Interceptor1, first to clear what is the interceptor, what is the filter 1.1 what is the Interceptor: Interceptor, in AOP (aspect-oriented programming) is used to intercept a method or field before it is accessed, and then to add some action before or after it. Interception is an implementation strategy of AOP. 's in

like Struts2 inside the execution of the interceptor, * just Struts2 inside the Intercept method to manually Call the Invoke method of Actioninvocation, * The Invoke method of calling Actioninvocation in Struts2 is to call the next interceptor or call the action, * and then

The 1.spring boot Interceptor is default Handlerinterceptoradapter Abstracthandlermapping Userroleauthorizationinterceptor Localechangeinterceptor Themechangeinterceptor 2. Configuring the Spring MVC Interceptor Webmvcconfigureradapter public class Webappconfig extends Webmvcconfigureradapter 3. Implement the Add Interceptor method

AngularJS interceptor and angularjs interceptor It is a good method to intercept an authentication request before it is sent to the server or when it is returned from the server. For example, for authentication, if the server returns a 401 status code, the user is redirected to the logon page. AngularJS provides a way to process the response from the global layer through the

This is a creation in Article, where the information may have evolved or changed. Interceptor The GRPC server provides a interceptor function that takes precedence over the data in the request when the server receives the request and then transfers it to the specified service processing and response, similar to the middleware, which is a good place to process validation, logging, and so on. In the example o

, and subsequent interceptor and controller are not executed; When the return value is true will continue to invoke the next interceptor prehandle method, if it is the last interceptor, it will be the controller method to invoke the current request. (2) posthandle (httpservletrequest request, httpservletresponse response, Object Handle, Modelandview Modelandvi

as: Sitemesh Plugin) 3, then Filterdispatcher is called, Filterdispatcher ask Actionmapper to decide if you need to call an action 4. If Actionmapper decides to call an action, Filterdispatcher the processing of the request to Actionproxy 5, Actionproxy through the configuration Manager to ask the framework of the configuration file, Find the action class that needs to be invoked 6, Actionproxy to create a actioninvocation instance. 7, the Actioninvocation instance uses the

1 Struts2 Working principleThe processing of a request in the STRUTS2 framework is roughly divided into the following steps:1. Client Initializes a request to a servlet container (such as Tomcat);2. This request passes through a series of filters (these filters have an optional filter called Actioncontextcleanup. This filter is very useful for integration of Struts2