Struts Getting Started Article Series (Links) and Learning Notes

Although it is a very early article, the entry is still very good, from the shallow depth, the example begins very simple, as long as you look at the code carefully, there are still many harvested.

First: [Chinese] Your first Struts application

http://www.fawcette.com/china/Articles.aspx?id=123&oon=old

Simplified everything can be simplified, just give a simple landing, verification, and exit. Note the simplest usage of Action (although irregular), and several XML files that need to be configured. When you see the source code, it is advised to look at it with the next article.

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Second: [Chinese] Struts application process control

http://www.fawcette.com/china/Articles.aspx?id=134&oon=old

Tell you how to run the first program and make more detailed analysis.

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Article 3: [Chinese] Optimize your Struts app with ActionForward

Http://www.fawcette.com/china/Articles.aspx?id=135&oon=old

That is to introduce ActionForward, it is recommended to modify itself on the first application, and deepen the impression.

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Article 4: [Chinese] Build a beautiful Struts application with ActionMapping

Http://www.fawcette.com/china/Articles.aspx?id=136&oon=old

Several features that simplify programming and improve flexibility in Struts:

1. In the Action tag, you contain a FroWard tag for action jump. use

Mapping.findforward (Name); 2. Configuring the following tab in Struts-Config to implement direct jump.

=========================================================================================================== ] Strut An Actionform for All to See

http://www.fawcette.com/javapro/2002_10/online/servletsjsp_bkurniawan_10_15_02/

Introduced Struts ActionForm

To use ActionFrom, you must complete the following steps:

1. Create a class corresponding to the form of the JSP, inheriting the Actionform class.

2. Configure struts-config.xml from-bean, for example:

3. Configure struts-config.xml to associate with an Action class, see the black body part of the following

<- If an error is returned, then go to this page A from a version contains the following:

1. In the form, the content GET / SET method (Eclipse can automatically generate these methods, more convenient. Eclipse3.1.)

2. Reset method for overloading ACTIONFORM. (Automatically call before passing it to the Action class)

3. You can overload the Validate method. (Automatically call before passing it to the Action class)

Get data in the form by the following type statement in ActionFrom

String username = (loginform) form .getusername ();

The ActionFrom type object is passed, and it needs to be converted to the type.

Form submitted to Actionform processes

FORM POST to Server -> ActionServlet Find the corresponding action-> Find the instance according to the name property in the action of "/ login" in struts-config, and is not created. Assign the content in the Form to this example-> Passing to ActionForm

================================ English] GRACE Under Errors

Http://www.fawcette.com/javapro/2002_10/online/servletsjsp_bkurniawan_10_28_02/

Struts mainly uses two classes to handle error ActionError and ActionerRors, the next one is the previous collection. ActionError inherited org.apache.struts.Action.actionMessage. There are 6 constructor.

After returning ActionerRors in ActionFrom, ActionerRRORS will access the associated JSP page.

1. For processing in the action, as shown below:

ActionerRORS ERRORS = new actionerrors (); errors.add (actionerroS.Global_ERROR, New ActionError ("InvaliDuser", "Invalid User Name and / or Password."); SaveerRors (Request, Errors);

2. The display error message an actionerRors object in the JSP page will be stored in the HttpRequest object, and you can read it. These things are usually used with Struts Taglib, and you will see how to implement it. Example: (the Struts used by the original code is low, some methods can not be used in the new version of Struts: such as actionerrors.global_message, ActionerRors.empty ()) has not been debugged since now, and later change to use Titles to display errors, intend This part will be empty and then change again.

<% // displays Error Messages, IF ANY

ActionErrors actionErrors = (ActionErrors) request.getAttribute (ActionMessage.GLOBAL_MESSAGE); if (actionErrors = null && actionErrors.isEmpty ()!!) {Out.println (actionErrors.size () "error (s) found
. "); Iterator errors = actionerrors.get (); while (Errors.hasNext ()) {ActionError ActionError = (Actionerror) errors.next (); string errorMessage = (String) [0]; Out.println ("-" ErrorMessage "
");} out.println ("

---

");}%> ================== ========= The above 6 articles are a complete series =

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Seventip: [Chinese] HTML tag library series provided using Struts

1. Improve development speed with label library

http://www.fawcette.com/china/Articles.aspx?id=253&oon=old

Introduced 3 labels in the simplest HTML, for example:

Width = "200" alt = "Company logo" />

2. Learn Struts and Form-related labels

http://www.fawcette.com/china/Articles.aspx?id=255&oon=old

Several labels corresponding to each element in Form

3. Use the HTML tag library provided by Struts

http://www.fawcette.com/china/Articles.aspx?id=256&oon=old

An example, but the Struts version issues, running Struts-Config.xml on Struts 1.2, there is a problem with the resource file mode, refer to Struts-Blank to change no problem.

PS: If a javax.servlet.ServletException: Cannot Find ActionMappings or actionformbeans collection error can refer to this first resolution

http://blog.9cbs.net/maxway/archive/2005/02/03/278596.aspx