MVC is the abbreviament of Model, View, Controller, MVC is the design pattern developed by Application, that is, everyone
Model2 you know. In the MVC design mode, you request your business logic, interface in Application development.
Display, data separation. That is, in Model, View, Controller: Data, Control (Business Logic)
Display (page display).
In the previous or traditional Web Application development methods, such as ASP, PHP, JSP (Model 1)
We implemented everything in ASP (PHP, JSP), such as: From the database to the data we need, and based on data
Related and actual needs to extract him in some way to the page and extract data from the form submitted by the page.
Business logic queries related data from the database, or writing data to the database. That is to say, we are in ASP (PHP, JSP)
Implementation: Interface Display, Business Logic, Data Access. The consequence of this is the ASP (PHP, JSP) you have written.
There is no level, and HTML and Script (JavaScript, JScript, ASP, PHP, JSP source code) are nesting each other.
The maintenance is poor, the most important thing is that the Web Application usually shows a piece of art, it is also a lot of time.
You write the ASP, PHP, JSP and then beautify it, it is likely that you find your code after you have finished working.
It has been unrecognizable. You have to reorganize your code.
The solution to this problem in the MVC mode is: VIEW is responsible for displaying, and view usually has been processed from Controller.
Data, then display it in the page, it should be said to nest in HTML, very small Script. Basic universal modification
I don't have a general meeting to abolish your labor results.
There are several developments that meet the MVC design model to make you choose from using Java Development Web Application.
1: JSP Servlet Javabean (EJB)
2: JSP Javabean (Controller) Javabean (EJB) (Model)
3: TDK (Turbine, Velocity ...)
4: XSP
5: JSP STRUTS JAVABEAN (EJB)
I personally think that there are two more than two kinds, others have any places, especially using TDK because there is a better
The tool can automatically generate a lot of code, as for its shortcomings in the comparison of several developments in the latter development, I will introduce.
Struts1.1 new features
Struts1.1 has some very good features compared to 1.0. The most important is that the function enhancement is enhanced. Struts1.1
The verification of the data is not implemented in the Action before the action, but is implemented through the Validation.xml.
The advantage of this is that the reuse is reinforced.
The main composition of struts1.1 implementation
Mainly include: action, actionform, actionmapping, actionforward, and development is an action
ActionForm writes or not written as needed. Below I will introduce a specific introduction.
Action
An action is an adapter Between the contents of an incoming http request
And The Corresponding Business Logic That Should Be Executed to Process this
REQUEST.
The above is a description of the Struts development team to Action, saying Action is actually Request and Business Logic
The intermediate adapter. It is common to take the data from the form and wear a series of operations to the business logic operation and then return the corresponding operation information.
Actionform
An actionform is a javabean optionally associated with one or more
ActionMappings. Such a Bean Will Have Had Its Properties Initialized from
The Corresponding Request Parameters Before The Corresonding Action's Execute ()
Method is caled.
The ActionForm is actually packaged and verped from the data taken from the request, and then gives the legal data to
Action is processed. In fact, ActionForm is more important in addition to data verification, in addition to writing
It is very effective. Instead, most of the data verification after 1.1 will be implemented in validation.xml.
ActionMapping, ActionForward
ActionMapping is mainly used in use with configuration and description related properties. First look at Struts-config.xml
A configuration description of the configuration file:
TYPE = "com.bingo.finance.action.useregaction"
Name = "Usegegform"
Scope = "request"
Validate = "True"
INPUT = "/ usereg.jsp">
ActionMapping is used to describe a URL of an action, a specific implementation file, corresponding ActionForm
Data Attributes, whether data checksum is required, and maybe after processing is completed
Jump URL.
ActionForward you can understand the jump URL after the ACTION operation is completed, and the action is processed after processing.
Returning is an actionforward to tell Struts I have finished this step.
Build a struts1.1 operating environment
My configuration is a discussion of Tomcat 4.0 or later, and other AppServer is roughly the same.
1: Get struts1.1
http://jakarta.apache.org/builds/jakarta-struts/release/v1.1-b1/jakarta-struts-1.1-b1.zip
2: Set
Put Struts.jar Copy to $ TOMCAT_HOME / COMMON / LIB or you use the web-inf / lib under the spruts appaction
Add the following configuration in Web.xml under Web.xml under the appaction of Struts
Action
org.apache.struts.Action.ActionServlet
config
/Web-inf/struts-config.xml
debug
3
detail
3
2
/web-inf/struts-html.tld
/web-inf/struts-html.tld
/web-inf/struts-logic.tld
/web-inf/struts-logic.tld
/web-inf/struts-nested.tld
/web-inf/struts-nested.tld
/web-inf/struts-template.tld
/web-inf/struts-template.tld
Struts1.1 provides a very detailed example, you can take a closer look.
Next you should configure struts-config.xml as needed, here is a simple example
"- // Apache Software Foundation // DTD Struts Configuration 1.1 // en"
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
TYPE = "com.bingo.finance.action.userform" />
TYPE = "com.bingo.finance.action.useregaction"
Name = "Usegegform"
Scope = "request"
Validate = "True"
INPUT = "/ usereg.jsp">
Parameter = "com.bingo.finance.common.displaymsg" />
I believe you can understand. I will not explain it. You need to continue to configure validation.xml, see below
Simple example.
Depends = "Required, Mask, MINLENGTH, MAXLENGTH">
Mask
^ / w $
minlength
5
maxices> Maxlength
20
Depends = "Required, Mask, MINLENGTH, MAXLENGTH">
Mask
^ / w $
minlength
5
maxices> Maxlength
20
Depends = "Required, Mask, MINLENGTH, MAXLENGTH">
Mask
^ / w $
minlength
5
maxices> Maxlength
20
Depends = "Required, Mask, MINLENGTH, MAXLENGTH">
Mask ^ / w $
minlength
10
maxices> Maxlength
20
The above validation.xml is to tell Struts that my usegegform takes the following verification.
UserName must not be empty and the minimum length is 5, the maximum length is 20.
..............
Password, nickname, superpass basically I don't do more, the configuration is basically over, we have to start writing
The first Struts.
Develop struts1.1
Usereg.jsp
In order to consider the flexibility of the page, all elements displayed in the page are placed in the Properties file and
com.bingo.finance.common.htmlmsg This file is taken.
============================================================================================================================================================================================================= ==================
<% @ Page contenttype = "text / html; charset = GBK"%>
<% @ Page Import = "java.io. *"%>
<% @ Page Import = "com.bingo.finance.common.htmlmsg"%>
<% @ Taglib URI = "/ Web-INF / STRUTS-HTML.TLD" prefix = "html"%>
<% @ Taglib URI = "/ Web-INF / STRUTS-LOGIC.TLD" prefix = "logic"%>
<% @ Taglib Uri = "/ Web-INF / STRUTS-Bean.tld" prefix = "bean"%>
<% = htmlmsg.title_regiseet%> </ title></p>
<p><meta http-equiv = "content-type" content = "text / html; charSet = GB2312"></p>
<p></ hEAD></p>
<p><body bgcolor = "# ffffff" text = "# 000000"> <form name = "usereg" method = "post" action = "usegeg.esp"></p>
<p><! - Devilical suffix in Struts is .do you can modify as needed -></p>
<p><table width = "100%" border = "0" cellspacing = "1" cellpadding = "1"></p>
<p><tril = "center"></p>
<p><TD COLSPAN = "2"> <% = htmlmsg.title_regiseet%> </ td></p>
<p></ TR></p>
<p><tr></p>
<p><TD width = "49%" align = "right"> <% = htmlmsg.common_username%>: </ td></p>
<p><td width = "51%"></p>
<p><! - In order to implement the backcrupration in Struts, it is recommended that you use TAG to use the following way of writing instead of general writing.</p>
<p><HTML: Text Property = "UserName" size = "20" maxlength = "30" styleclass = "css" styleId = "userid" /></p>
<p>The above code, you don't understand, you need to further understand TAG.</p>
<p>-></p>
<p><Input Type = "text" name = "username" size = "20" maxlength = "20"></p>
<p></ td></p>
<p></ TR></p>
<p><tr></p>
<p><td width = "49%" align = "right"> <% = htmlmsg.common_password%>: </ td></p>
<p><td width = "51%"></p>
<p><Input Type = "Password" name = "password" size = "20" maxlength = "20"></p>
<p></ td></p>
<p></ TR></p>
<p><tr></p>
<p><td width = "49%" align = "right"> <% = htmlmsg.common_nickname%>: </ td></p>
<p><td width = "51%"></p>
<p><Input Type = "text" name = "nickname" size = "20" maxlength = "20"></p>
<p></ td></p>
<p></ TR></p>
<p><tr></p>
<p><td width = "49%" align = "right"> <% = htmlmsg.common_superpass%>: </ td> <TD width = "51%"></p>
<p><Input Type = "Password" name = "superpass" size = "20" maxlength = "20"></p>
<p></ td></p>
<p></ TR></p>
<p><tr></p>
<p><td width = "49%" align = "right"></p>
<p><input type = "submit" name = "submit" value = "<% = htmlmsg.action_regiseet%>"></p>
<p></ td></p>
<p><td width = "51%"></p>
<p><Input Type = "reset" name = "submit2" value = "<% = htmlmsg.common_reset%>"></p>
<p></ td></p>
<p></ TR></p>
<p></ table></p>
<p></ form></p>
<p></ body></p>
<p></ html></p>
<p>Usegactiom.java</p>
<p>============================================================================================================================================================================================================= =========</p>
<p>Package com.bingo.finance.action;</p>
<p>// java import</p>
<p>Import java.io.ioException;</p>
<p>Import java.util.locale;</p>
<p>// servlet import</p>
<p>Import javax.servlet.servletException;</p>
<p>Import javax.servlet.http.httpsession;</p>
<p>Import javax.servlet.http.httpservletRequest;</p>
<p>Import javax.servlet.http.httpservletResponse;</p>
<p>// Struts import</p>
<p>Import org.apache.struts.Action.action;</p>
<p>Import org.apache.struts.Action.actionform;</p>
<p>Import org.apache.struts.Action.actionForward;</p>
<p>Import org.apache.struts.action.actionmapping;</p>
<p>Import org.apache.struts.util.MessageResources;</p>
<p>// Finance Import</p>
<p>Import com.bingo.finance.action.userform;</p>
<p>Import com.bingo.finance.manager.userManager;</p>
<p>Import com.bingo.finance.entity.user; public class usegegAction extends action {</p>
<p>// Using Perform before Struts1.1</p>
<p>//struts1.1 uses EXECUTE replacement Perform</p>
<p>Public ActionForward Execute (ActionMapping Mapping,</p>
<p>Actionform Form,</p>
<p>HTTPSERVLETREQUEST REQUEST,</p>
<p>Httpservletresponse response</p>
<p>THROWS IOException, servletexception {</p>
<p>Try {</p>
<p>Userform Userform = (userform) form;</p>
<p>UserManager UserManager = New UserManager ();</p>
<p>User User = UserManager.formToentity (Userform);</p>
<p>UserManager.Add (user);</p>
<p>// INSERT INTO DATABASE A UserInfo</p>
<p>} catch (exception ex) {</p>
<p>Return mapping.findforward ("error");</p>
<p>}</p>
<p>Return mapping.findforward ("Success");</p>
<p>// forward is "/msg.jsp"</p>
<p>}</p>
<p>}</p>
<p>Userform.java</p>
<p>============================================================================================================================================================================================================= =====================================================================================================================================================</p>
<p>Package com.bingo.finance.action;</p>
<p>Import java.util. *;</p>
<p>Import java.io.serializable;</p>
<p>// servlet import</p>
<p>Import javax.servlet.servletException;</p>
<p>Import javax.servlet.http.httpsession;</p>
<p>Import javax.servlet.http.httpservletRequest;</p>
<p>Import javax.servlet.http.httpservletResponse;</p>
<p>// Struts import</p>
<p>Import org.apache.struts.action.actionmapping;</p>
<p>Import org.apache.struts.validator.validatorform;</p>
<p>Public Class Userform Extends ValidatorForm IMPLEments Serializable {</p>
<p>// Usually Form inherited Actionform before Struts1.1</p>
<p>// In fact, ValidatorForm is inherited an actionform</p>
<p>/ / Why do you have a layer of validatorform to do it?</p>
<p>Private string id;</p>
<p>PRIVATE STRING UserName;</p>
<p>PRIVATE STRING Password;</p>
<p>Private string nickname;</p>
<p>PRIVATE STRING Superpass;</p>
<p>Public userform () {}</p>
<p>/ **** /</p>
<p>Public string getId () {</p>
<p>Return this.id;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public void setid (string _id) {</p>
<p>THIS.ID = _ID;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public string getUsername () {</p>
<p>Return this.username;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public void setusername (string _username) {</p>
<p>THIS.USERNAME = _USERNAME;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public string getpassword () {</p>
<p>Return this.password;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public void setpassword (string _password) {</p>
<p>this.password = _password;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public string getnickname () {</p>
<p>Return this.neickname;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public void setnickname (String _nickname) {</p>
<p>this.neickname = _nickname;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public string getsuperpass () {</p>
<p>Return this.superpass;</p>
<p>}</p>
<p>/ **** /</p>
<p>Public void setsuperpass (String _superpass) {</p>
<p>THIS.SUPERPASS = _SUPERPASS;</p>
<p>}</p>
<p>/ ** Show this class info ** /</p>
<p>Public string toString () {</p>
<p>StringBuffer info = new stringbuffer ();</p>
<p>Info.append (".... ID is:" ID);</p>
<p>Info.append (".... Username is:" username);</p>
<p>Info.append (".... Password is:" password);</p>
<p>Info.append (".... nickname is:" nickname);</p>
<p>Info.append (".... superpass is:" superpass);</p>
<p>Return info.toString ();</p>
<p>}</p>
<p>Public void reset (actionMapping mapping, httpservletRequest request) {</p>
<p>ID = NULL;</p>
<p>Username = NULL;</p>
<p>Password = NULL;</p>
<p>Nickname = NULL;</p>
<p>Superpass = NULL;</p>
<p>}</p>
<p>}</p>
<p>UserManager.java, User.java file I will not provide, this part is based on the actual development as needed.</p>
<p>Treatment, that is, insert the data into the database.</p>
<p>Now a simple registration user is developed. Very simple. Oh, continue to work hard ... but there are still many</p>
<p>Details, you need to know more, I only get you, you must go to study some things, such as, I hope</p>
<p>My users do more email fields and an age field I should do, and I hope Validation.xml verification</p>
<p>There is an email legal verification, and the age must be greater than 0 and must be an integer. Then how should I do?</p>
<p>I can only tell you to add two fields. You need to modify the Form to add fields, and the corresponding file must be modified. In Struts</p>
<p>Email's verification is very simple. Look at the example, study Validator-Rules.xml, this I think Struts1.1</p>
<p>The best function increases (Struts1.0 does not have this file). A very flexible and highly high verification mechanism is provided in Struts. Comparison of Struts and other development methods</p>
<p>The use of Struts development at least the following benefits:</p>
<p>1: The hierarchical structure is very clear, which makes it clear.</p>
<p>2: High reuse, even data verification can be reused, and there is a better reuse of form, Action is a good reuse.</p>
<p>3: Good maintenance. This is the first point.</p>
<p>.................</p>
<p>Below I said the shortcomings of Struts, if you use or understand TDK, you will feel that there are many TDKs.</p>
<p>Java source code can indeed save a lot of workload, and Struts can also do very well. I have developed a tool, function</p>
<p>Not strong enough. In my plan, I hope FORM, Javabean (package data is equivalent to EJB ENTITY BEAN),</p>
<p>Even Method, including the operational database, is automatically generated, and Validation.xml can also be generated. However because</p>
<p>Next reason: Struts is not a mature project so far. His change is really too big. 1.0 and 0.5</p>
<p>There is a big change. So my plan has changed. I hope to completely push it out in 1.1 and then do it (1.1 is now the beta version).</p>
<p>At the same time, I also write a letter to Craig R. McClanahan (Team Leader developed by Struts).</p></div><div class="text-center mt-3 text-grey">
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