I personally summarized the detailed Struts2 interceptor usage and interception stack configuration in java.

Struts2 interceptor is a good tool! In particular, the custom Interceptor. The following is a detailed process that I personally organized. I hope to help you and provide valuable opinions.

 

Principle:

A) The Web browser sends a request

B) First, use a set of Struts2 default interception stack dispatcher (or ServletFilter)

C) custom interceptor (interceptor)

D) Action

E) Result

 

The struts. xml configuration is as follows:

<Name = "" namespace = "/" = "struts-"> <-- All configurations should be placed in the package --> <interceptors> <-- custom configurations of all interceptor and references and definitions of intercepted stacks should be placed in interceptors --> <-- custom interceptor name specifies the reference name of the custom interceptor and specifies the implementation class of the Interceptor (full path) --> <interceptor name = "sessionCheck" = "com. cqrcb. perinvite. interceptor. authorityInterceptor "/> <-- custom interception stack name specifies the reference name of the custom interception stack --> <interceptor-stack name =" sessionCheckStack "> <-- name indicates the name of the interceptor to be referenced the reference name just defined an interceptor named sessionCheck, the reference is sessionCheck --> <-- each custom interception stack must be matched with the defaultStack interception stack, which is the default interception stack of Struts2, it encapsulates a group of interceptors --> <interceptor-ref name = "defaultStack"/> <interceptor-ref name = "sessionCheck"/> </interceptor-stack> </interceptors> <-- configure the global default Action --> <-action-ref name = "IndexAction"/> <-- configure the global default result --> <global-results> <-- configure the token invalid. token return view. When the page is submitted repeatedly, the page is automatically forwarded to/error. the jsp page prompts --> <result name = "invalid. token ">/error. jsp </result> <result name = "error">/error. jsp </result> <-- configure resule whose name is backhome, redirect to IndexAction --> <result name = "backhome" type = "redirectAction"> IndexAction </result> <-- configure resule whose name is testChain, jump to testAction --> <result name = "testChain" type = "chain"> testAction </result> </global-results> <-- there are two ways to use the interceptor, annoction (annotation) and xml configuration. The following is XML configuration --> <action name = "testAction" = "com. cqrcb. perinvite. resume. action. testAction "> <-- Introduce sessionCheckStack interception stack name as the reference name defined by the interception stack before this Action access --> <-- This sessionCheckStack already contains the default interception stack of the custom interceptor and Struts2, therefore, you can directly reference sessioncheckstack --> <interceptor-ref name = "sessionCheckStack"/> <-- If you directly reference a custom interceptor, that is, it does not contain the default interception stack, you need to reference Struts2's default interception stack, <interceptor-ref name = "testInter"/> <interceptor-ref name = "defaultStack"/> <-- only one defaultStack exists in an Action, if the referenced interception Stack has defaultStack, you do not need to reference defaultStack any more. Otherwise, reference --> <result name = "success"> </result> <result name = "input"> </result> </action> </>

 

Use interceptor and interception stack in annoction Annotation

      @InterceptorRef(value="token"      @InterceptorRefs(@InterceptorRef("sessionCheckStack"))

 

Javabean of the custom interceptor

Package com. cqrcb. perinvite. interceptor; import com. cqrcb. perinvite. logon. action. indexAction; import com. netbank. pub. vo. core. pbClientInfoVO; import com. opensymphony. xwork2.ActionContext; import com. opensymphony. xwork2.ActionInvocation; import com. opensymphony. xwork2.interceptor. abstractInterceptor;/*** permission interception Action * @ author wangyupeng ** // inherits the AbstractInterceptor class public class AuthorityInterceptor extends actinterceptor {private static final long serialVersionUID = response; // override the intercept method public String intercept (ActionInvocation invocation) throws Exception {// obtain the interception path of the Action ActionContext ax = invocation. getInvocationContext (); // get the Action Object action = invocation. getAction (); // The action instanceof IndexAction is interpreted as if the Action instance is IndexAction if (action instanceof IndexAction) {// if it is IndexAction, it is executed, return invocation is not intercepted. invoke () ;}// obtain the object PbClientInfoVO pinfo = (PbClientInfoVO) ax whose key is pinfo in the session. getSession (). get ("pinfo"); if (pinfo = null) {// if pinfo is null, return the view with the global result of backhone return "backhome ";} // if neither of them is false, return invocation is not blocked. invoke ();}}

　　

 

The custom interceptor of struts2 has many methods. The content in this article is pre-interception, that is, the interception of the request to obtain the action. Struts2 also has post-interception and intermediate interception, which are also very common. I will post it to my blog after I have time to sort it out. Let's discuss it together.