struts2 interceptor

This article comes from: Cao Shenhuan blog column. Reprint please indicate the source:http://blog.csdn.net/csh624366188 In the last blog, we saw the specific implementation of the interceptor principle, and looked at the source (Details Struts2 (eight) interceptor implementation principle and source analysis), this blog, I'm going to take you through the

Struts2 default interceptor defastack stack, struts2 default interceptor When Struts2.3.20 is used for the first time, the foreground page transmits a value to the background. How can I always prompt that the value is null? I forgot to introduce the defaultStack interceptor

The Struts2 Interceptor (Interceptor) is a very important concept, and most of the functions in STRUTS2 are implemented through interceptors. Here's how to implement the Interceptor in Struts2 and try to customize an

for the configuration file, instantiates the relative interceptor object based on the configuration, and then Concatenates the object into a list ), finally, the interceptor in the list is called one by one. Existing interceptor Struts 2 provides you with a wide range of interceptor implementations. You can go to the

. opensymphony. xwork2.interceptor. abstractinterceptor; public class testinterceptor2 extends actinterceptor {@ overridepublic string intercept (actioninvocation Invocation) throws exception {system. out. println ("interceptor2 intercepted before action"); string result = invocation. invoke (); system. out. println ("interceptor2 intercepaction"); return result ;}} Struts. xml Successful processing result welcome. jsp file: Default homepage:

1, the STRUTS2 Interceptor interceptor three kinds of configuration method Method 1. General Collocation method We need to explicitly introduce it into the--> Method 2. Configure the Interceptor stack (an element that will be concatenated with multiple interceptor). The

The STRUTS2 project uses the IF tag of struts to determine the session, so that users who are not logged on cannot see the page, but this is now only in the view layer, if the user is not logged in directly in the Address bar to enter the address of the logged in user to access, Then the corresponding action will be executed, just do not let the user see it. This is obviously not good, so we have studied the authorization of

the servletdispatcher of Struts 2, struts 2 looks for the configuration file and instantiates the relative interceptor object based on its configuration, then strings it into a list (list), and the last one invokes the interceptor in the list, as shown in Figure 1. Figure 1 Interceptor call sequence diagram Existing interceptors Struts 2 has provided you with

Struts2 Study Notes (10) -- custom interceptor and struts2 Study Notes The Struts2 interceptor is implemented based on the idea of AOP, while the implementation of AOP is based on dynamic proxy. The Struts2

The Struts2 interceptor is the core of the struts2, and its underlying implementation uses the Java reflection mechanism and dynamic proxy.How to implement the Struts2 interceptor1. Implement the Interceptor interface to implement the Init (), Destory (), intercept () method

Difference and use of struts2 filter and interceptor, struts2 Filter Java web Filter and interceptor 1.1 What is an interceptor: Interceptor, used in AOP (Aspect-Oriented Programming) to intercept a method or field before it is ac

By default, if we define an interceptor for an action, the interceptor intercepts all methods in the action. However, in some cases, we do not want to intercept all methods. We only need to intercept some specific methods. In this case, we need to use the method filter feature of the struts2 interceptor. To implement m

[Struts2 Study Notes (10)] custom interceptor management permission access, struts2 Study Notes (1) The functions of the interceptor are not directly mentioned in the Code: To customize the Interceptor, you must implement the com. opensymphony. xwork2.

Struts2 dynamic call + Servlet filter + struts2 interceptor, struts2servlet On weekends, it's really hard to get bored ...... This article is based on the complete s2sh project. If you are not familiar with the construction of the s2sh project, please refer to the following articles:In eclipse, the struts2 project is b

One, overview This article is mainly about how to customize the interceptor and through the custom interceptor to understand the interceptor lifecycle. Two, custom Interceptor 1) write an Interceptor class Hellointerceptor, which implements the

In my personal summary, the Struts2 interceptor uses and intercepts stack configurations. Based on the annotation method, struts2 intercepts Struts2 interceptor is a good tool! In particular, the custom Interceptor. The following

Abstract classAbstractinterceptorImplements the interceptor interface and provides empty implementations of the init and destroy methods. If our interceptor does not need to open resources, you do not need to implement these two methods. It can be seen that it is easier to implement a custom interceptor by inheriting the abstractinterceptor abstract class. In the