java interceptor

form; Gets the username value inside the container, if there is a description that the user has logged in, let him perform the operation if he is not logged in and let him login string username = (string) session.get ("username"); System.out.println (username+ "username"); if (username!= null) {Invocation.invoke (); return "Login"; } } to take a look at the specific struts.xml configuration: The above is a simple permission control code implementation. Specific source code download

1, the concept of interceptorsThe Interceptor in Java is the object that dynamically intercepts action calls, and it provides a mechanism to enable a developer to execute a piece of code before and after an action execution, or in an actionPrevents execution before execution, and also provides a way to extract reusable portions of the code in the action. In AOP, interceptors are used to intercept a method o

. Addinterceptors (registry); } @Bean PublicFilterregistrationbean Registfilter () {Filterregistrationbean registration=NewFilterregistrationbean (); Registration.setfilter (NewOpenentitymanagerinviewfilter ()); Registration.addurlpatterns ("/*"); Registration.setorder (1); returnregistration; }Monitor all the routing addresses on the line, then. Netcore how to deal with it? It's used here. Action in the Netcore to illustrate. Netcore InterceptorWhen executing an action, you need to process the

= (httpservletrequest) request; String URL = Httprequest.getrequesturl (). toString ();if (url = =null | | Url.trim (). Length () = =0) {Return }if (Url.indexof (lucenecreatemapping)! =-1 | | url.indexof (lucenesearchmapping)! =-1) {dofilterforxxx ( Request, response, URL); } else {doxxxx (request, response, URL);} if (log.isdebugenabled ()) { Long endTime = System.currenttimemillis (); Thread CurrentThread = Thread.CurrentThread (); String threadname = Currentthread.getname (); Log.debug ("["

of AOP (aspect-oriented programming).5) Interceptor Stack (Interceptor stack): The Interceptor is connected in a certain order into a chain. When accessing the intercepted method, interceptors in the Struts2 interceptor chain are called sequentially in the order in which they were previously definedInterceptor model o

*@authorWangyupeng **///inheriting the Abstractinterceptor class Public classAuthorityinterceptorextendsabstractinterceptor{Private Static Final LongSerialversionuid = 4546936882066035745L; //overriding the Intercept method PublicString Intercept (actioninvocation invocation)throwsException {//get the action's intercept pathActioncontext ax =Invocation.getinvocationcontext (); //Get Action ObjectObject action =invocation.getaction (); //Indexaction does not do this intercept action instance

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

Differences and connections between servlet, filter, Listener, Interceptor First, the concept 1.servlet:servlet is a server-side Java application that has platform-and protocol-independent features and can dynamically generate Web pages that work in the middle tier of client requests and server responses. 2.filter:filter is a reusable code fragment that can be used to transform HTTP requests, responses,

Detailed examples of Java interceptor and aspect in the application market, java instances I believe you are familiar with the concepts of interceptor and cut-plane. In this article, we will look at the use of interceptor and cut-plane in the application market. Use of

InterceptorSpeaking of Interceptor, I believe that familiar with Struts2 's children's shoes will not be unfamiliar, struts2 can customize the interceptor to carry out their own desired series of related work. And the interceptor we're talking about here are pretty much the same function.Nonsense not to say, directly to the code:The following is the Myinterceptor

elegant way to provide crosscutting application functionality. Creating a custom interceptor is easy, requiring an extended interface, the following interceptor interface: Public interface Interceptor extends serializable{ void Destroy (); void Init (); String Intercept (actioninvocation invocation) throws Exception; } As its name suggests, t

the servlet is used as a filter, it can process the client's request. When processing is complete, it is handed over to the next filter, so that the customer's request is processed one by one in the filter chain until the request is sent to the target. For example, a Web site that has submitted a "Modified registration information" page, when the user completed the modification information and submitted, the server in the process of doing two things: to determine whether the client's session is

How to Develop a java open-source framework ----- implement custom Annotation and interceptor in the Jvn framework (Lecture 5) ----- jvnannotationPreface I, The blogger is teaching you how to develop a javaEE framework (Jvn framework). The blog has a complete development video. Every blog post is a knowledge point to help you understand the framework: This content: http://pan.baidu.com/s/1hq3sng4 1. Why sho

request. When processing is complete, it is handed over to the next filter, so that the customer's request is processed one by one in the filter chain until the request is sent to the target. For example, a Web site that has submitted a "Modified registration information" page, when the user completed the modification information and submitted, the server in the process of doing two things: to determine whether the client's session is valid, and the data submitted uniformly encoded. These two t

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 servlet container.The ③ interceptor only works on action requests, while filters can work on almost all requests.The ④

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 servlet container.The ③ interceptor only works on action requests, while filters can work on almost all requests.The ④

There are a lot of Java beginners for the MyBatis interceptor Inteceptor is not very understanding, here I will organize the next chapter on the Java MyBatis Interceptor Inteceptor detailed, This paper mainly analyzes the plug-in mechanism of mybatis, in fact, is the implementation of the responsibility chain model of

Memory is not as good as bad pen 46-java Interceptor-a thorough understanding of the concept of dynamic proxy (1), pen 46-java Dynamic proxy technology is a very important part of the entire java technical system. It is the basis for us to learn more about the java framewor

Today to learn and understand, filter and SPRINGMVC of the difference between the interceptor, learned a lot of things, has always thought that the interceptor is a filter to achieve, now think of is really a mistake ah, and look at the relatively superficial, not a global and meticulous understanding, due to the late night, time reason, I will take some of the points of view of netizens, we carefully look

Today to learn and understand, filter and SPRINGMVC of the difference between the interceptor, learned a lot of things, has always thought that the interceptor is a filter to achieve, now think of is really a mistake ah, and look at the relatively superficial, not a global and meticulous understanding, due to the late night, time reason, I will take some of the points of view of netizens, we carefully look