generic interceptor

Java generic explanation (General generic, wildcard, generic interface, Generic Array, generic method, generic nesting) JDK 5.0 has long been expected, but it was changed to version when it was released. This shows that Java has c

Why use a generic collection?There are two main ways to implement a collection before C # 2.0:A. Using ArrayListIt is intuitive to put objects directly into ArrayList, but because the items in the collection are of type object, a tedious type conversion is required for each use.B. Using a custom collection classA more common practice is to inherit a custom class from the CollectionBase abstract class and implement a strongly typed collection by encaps

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 built-in interceptors and how to customize ou

Detailed description of struts interceptor and struts interceptor1. Interceptor: The Struts2 interceptor intercepts a field before or after accessing an Action or Action. The Struts2 interceptor is pluggable and is an implementation of AOP.Explanation of WebWork Chinese document: the

What is an interceptor? Interceptor, used in AOP (Aspect-Oriented Programming) to intercept a method or field before it is accessed, and then add some operations before or after it. Interception is an implementation policy of AOP. In the Chinese Document of Webwork, the interceptor is the object for dynamically intercepting Action calls. It provides a mechanism f

Struts 2 interceptor and struts interceptorWhat is the Struts 2 interceptor? When a user requests an Action class in the background, the interceptor sends the page (data) to the browser before the execution of the Excute () method of the Action and after the Result returns the magic board attempt) some common operations are required to intercept data in the

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 or field before it is accessedThen add some ac

There are many reasons for the emergence of generics, and one of the most noticeable reasons is to create container classes.Generic classThe container class should be one of the most reusable class libraries. Let's take a look at how a container class is defined without a generic type:PublicClass Container {Private String key;Private Stringvalue; public container (string k, string v) {key = k; value = V; } public String getkey () {return key ; } publi

We have introduced some interceptor configurations and basic usage methods. So this time we will introduce the practical functions of the interceptor. The utility interceptor completes permission control. When a visitor needs to perform an operation, the application must first check whether the visitor is logged on and whether there are sufficient permissions

A generic interface does not have a generic interface. Every time you try to use a non-generic interface (such as icomparable) to manipulate a value type, it is packed and the type security during compilation is lost. This severely limits generic applications. Therefore, CLR provides support for

request ends , my interceptor gets the session data from the request, verifies that the user is logged in, if flag is true, returns False;2.posthandle (Request,response,handle, Modleandview): Explained by the Prehandle method we know that this method, including the Aftercompletion method that is to be mentioned later, can only be called if the return value of the Prehandle method of the current owning interceptor