java struts 2 tutorial

Now the mainstream Java front-end framework is: STRUTS1,STRUTS2,SPRINGMVC and the most basic servlet;Some days ago a friend asked me this question and studied it:1. About Struts1:The Actionservlet used by Struts1 is singleton and is handled by this servlet for all. Do requests. Requestprocessor is also a single case.Requestprocessor Method of Processactioncreate:/***From the results can be known, is a single case, since it is a single case, if the use

The first is the web. xml configuration, which is the start of project loading. 1 Then the struts. xml file under src is the source of the struts configuration file. 1 After the master configuration file is loaded, the sub-configuration file is loaded. Write one here, and the other is dispensable. Check the project structure. Strutsxml/struts. xml 1 The action

forStruts2OfActionDon't worry about thread-safety issues.6.InStruts1Used inFormbeanEncapsulates the request parameters in theStruts2Direct use inActionProperties to encapsulate pleaseParameters are evaluated.7.struts1Multiple business methods in aActionMedium time (that is, inheritanceDispatchaction), or both,Either are not verified;Struts2, you can specify that only one method is validated when aActionInherited theActionsupportAnd in this class, you write only theValidateXxx ()method, then onl

, theActionDifficulty in controlling the implementation. StrutsCreate aAction, if you want to control the order in which it will be executedVery difficult. You even have to write it back.ServletTo achieve this functional requirement for you.Eight, toActionPre-and post-execution processing. StrutsProcessingActionThe time is based onClassOfHierarchies，Difficult toActionOperations before and after processing.IX. Insufficient support for eventsstruts is actually a form form corresponds to a action

Asp.net MVC is constantly being improved, and nsun. MVC is just written by my hobbies and practical experience. Most netProgramMembers may not like Java's tedious configuration programming. I have compiled the Asp.net-based MVC Framework nsun. MVC following the Java MVC Framework struts, and I have also used the configuration methods like Java for reference. I

the Send Email button. If all goes well, you should see the following pages: If the SSH three framework is used together, here's another example, but the struts and spring frameworks also need mail.jar,activation.jar. 1 First configure the Bean in the Applicationcontext.xml file 2 implementation of sending mail Java class code protected

This article introduces the program code for retrieving paths in java, struts, and tomcat. If you need it, please refer to it. The Code is as follows: Copy code File f = new File (".");String absolutePath = f. getAbsolutePath ();System. out. println (absolutePath ); 1. Space in the path: The Code is as follows: Copy code String pathtem = null;URL ut = T

1, resource file naming The internationalized resource file naming format is as follows: Basename_language_country.properties basename_language.properties basename.properties Where basename is the basic name of the resource file, language and country must be Java-supported languages and countries. Get the language and country code for Java support as follows: locale[] locales = Loc

My solution is: Don't use xwork-2.1.6.jar, for xwork-2.1.2.jar! The struts tag library is introduced in the JSP page: Write a simple form, JSP error after running result: Java. Lang. classnotfoundexception: COM. opensymphony. xwork2.util. textutils Literally, we already know the cause: the textutils class cannot be found. Take a lookCodeNo error. OK. The code is correct. That's anot

=Newftpclient (); Try { intreply; Ftp.connect (URL, port); //If you use the default port, you can connect directly to the FTP server using Ftp.connect (URL)Ftp.login (username, password);//LoginReply =Ftp.getreplycode (); if(!ftpreply.ispositivecompletion (Reply)) {Ftp.disconnect (); return false; } ftp.changeworkingdirectory (RemotePath);//Transfer to FTP server directoryftpfile[] fs =Ftp.listfiles (); Booleanftpfileexist=false; for(Ftpfile ff:fs) {String ffname=NewStr

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