How to configure and develop struts in eclipse (1)

Keywords: Eclipse, myeclipse, struts, Java

Preface

This article describes in detail how to configure and develop struts in eclipse Based on the instance. I have seen many such articles on the Internet before, and many netizens have asked such questions. Therefore, I want to write a detailed article based on my actual experience and examples. One is to help you, and the other is to test your knowledge.

This article is just some of my comments. If you have any errors, please comment on them.

　

Development Environment

Jdk00004_03, click to download

Tomcat5.0.28, click to download

Eclipse3.1.2. Click to download the Chinese package. The Chinese package 3.1.1 is also applicable to 3.1.2.

Myecil00004.1, click to download myecil00004.1 and crack the patch

Tomcatplugin plug-in, click to download tomcatplugin plug-in

For more Eclipse plug-ins, click to enter

　

Requirement

The struts application instance to be combined in this article is logon. The requirements for Logon are as follows:

1. Receive the username and password, go to the success page, and prompt "<username> welcome to log on !".

2. If the user name is empty, the system submits the form and prompts "Enter the user name !".

3. If the password is blank, the system submits the form and prompts "enter the password !".

4. If you enter an invalid user name, the system prompts "enter the correct user name !".

5. Use the model component to save logon information.

　

Introduction to the application instance logon framework

A logon application consists of the following modules:

1 model (m): The model is a JavaBean Component-savelogon, which contains two attributes: username (username) and userpassword (password). You can use GET/set to read and set attributes, and the method used to save the logon information is savetodb (). The savetodb task is to save the login information to a persistent storage system (such as a database ).

2 view (v): The view includes two JSP files and one actionform bean-logonform. The JSP files are logon. jsp and success. jsp. Logon. jsp is responsible for accepting user names and passwords and displaying error information. Success. jsp is responsible for displaying logon success information.

3. Controller (c): the controller is an action-type logonaction. Verify the business logic of the data, call the model component to save the login information, and select the view component to return it to the user.

　

Struts Working Mechanism

In the View component (logon. JSP), enter the user name and password, and submit the HTML form. The Struts framework first reads the web. configure servlet in XML, and then automatically encapsulate form data into actionform bean. In this example, It is logonform. Logonform verifies the validity of the submitted data (such as the shortest length and whether it contains invalid characters ). If the actionform bean verification fails, logonform returns the actionerrors object. The Struts framework stores the actionerrors object within the request range and forwards the request to the view component, the <HTML: errors/> label is used in the view component to display the error information contained in the actionerrors object within the request range. If the error information is verified by the actionform bean, the actionerrors object returned by logonform is null. The Struts framework submits the form data to the logonaction component of the controller. The controller verifies the business logic of the form data. If the logonaction verification fails, create an actionmessages object that contains the error message, save the actionmessages object to the request range by using the saveerrors method, forward the request to the view component, and pass <HTML: errors/> label to display the re The error message contained in the actionerrors object within the quest range; If logonaction passes verification, the Struts framework accesses the model component, then the Struts framework returns the actionfoward object, and according to the configuration of the Struts-config.xml file, decides to pass the forwarding information contained in the actionfoward object to that view component.

　

Deploy Struts Framework

Everyone has a certain understanding of the working mechanism of Struts. Now we will introduce how to deploy the Struts framework in eclipse.

The environment mentioned in this article has been mentioned earlier. This article does not introduce the installation of eclipse and its plug-ins myeclipse and tomcatplugin. Please refer to other articles. For more information about eclipse, see http://blog.csdn.net/baggio785/category/148174.aspx.

1. Create a project

1) Select Java> Tomcat project, next, 1

(Figure 1)

2) enter the project name. If the default value of the project directory is not used, modify it and click Finish. II

(Figure 2)

2. Create a Struts Framework

1) Right-click Project> New> Other> myeclipse> Web-Struts> struts 1.2> struts 1.2 form, Action & JSP. 3. If an error occurs in this step, this article does not describe it. Please refer to my other article-how to solve the problem of creating struts in myeclipse.

(Figure 3)

2) Configure struts actionform

Because the struts application instance in this article is a user logon, use logon in use case. Select a superclass. Other Default values are used. Thu

(Figure 4)

Enter optional details and enter form items. In this example, username and password are used ). Click Add. For details, see Figure 5 and figure 6.

(Figure 5)

(Figure 6)

After the input is complete, the form properties of optional details will be displayed. VII.

(Figure 7)

We use the default setting for the settings on the Methods tab.

Click the JSP tab, select the "Create JSP form" option, and set "/form/logon. jsp" by default ". 8

(Figure 8)

3) Configure struts action

The preceding steps complete the form configuration. configure action below.

Click Next in Figure 8 and use the default setting. 9

(Figure 9)

The parameter and methods options also use the default value.

Click the forwards tab and click Add. The configuration successful page is displayed. In this article, success. jsp in the root directory is selected as the success page, and the name is logon_ SC. 10

(Figure 10)

After the input is completed, the forwards of optional details is displayed. 11th

(Figure 11)

Click Finish.

Struts has been configured. Look at eclipse, there are some more stuff in the project, such as Struts-related jar, as well as struts-config.xml and TLD files. The struts-config.xml code is as follows:

Code listing 1 (struts-config.xml)

<? XML version = "1.0" encoding = "UTF-8"?>

<! Doctype Struts-config public "-// Apache Software Foundation // DTD struts configuration 1.2 //" http://struts.apache.org/dtds/struts-config_1_2.dtd ">

<Struts-config>

<Data-sources/>

<Form-beans>

<! -- Here is the configuration information of actionform. The name of actionform bean is logonform, and the corresponding class is com. mystruts. Struts. Form. logonform -->

<Form-bean name = "logonform" type = "com. mystruts. Struts. Form. logonform"/>

</Form-beans>

<Global-exceptions/>

<Global-forwards/>

<Action-mappings>

<! -- Here is the configuration information of the action component, which describes the action ing from the specific request path to the response action -->

<! -- Attribute: Set the key of the actionform associated with the action in the request or session range. It is the name in the request or session sharing. -->

<! -- Input: Specify the URL containing the form. The URL sent when form verification fails. -->

<! -- Name specifies the name of the form associated with the action. The name must have been defined in form-bean and can be written or not -->

<! -- Path specifies the path of the request to access the action, which must start with "/" -->

<! -- Scope specifies the scope of form, for example, request -->

<! -- Type specifies the class corresponding to the action component -->

<Action

Attribute = "logonform"

Input = "/form/logon. jsp"

Name = "logonform"

Path = "/logon"

Scope = "request"

Type = "com. mystruts. Struts. Action. logonaction">

<! -- This is forward, that is, the local forwarding configuration information. After logging on successfully, the system redirects to/success. jsp and the name is logon_ SC -->

<Forward

Name = "logon_ SC"

Path = "/success. jsp"

/>

</Action>

</Action-mappings>

<! -- The configuration information of the message resource file is used to configure the resource bundle. It is used to store the local text message file. Parameter specifies the file name, excluding the suffix. -->

<Message-resources parameter = "com. mystruts. Struts. applicationresources"/>

</Struts-config>