A basic struts form example.
Developing a struts example involves the following steps.
1) A form bean that extends org.apache.struts.action.ActionForm.
In this application it is NewStrutsActionForm.java
2) A action class that extends org.apache.struts.action.Action
In this application it is NewStrutsAction.java
3) A form based on struts html tags.
In this application it is RegisterForm.jsp
4) mappings in the struts-config.xml file
In this application these are :-
Declaration of the form bean
<form-beans>
<form-bean name="NewStrutsActionForm" type="hypatia.NewStrutsActionForm"/>
</form-beans>
action mappings
<action-mappings>
<action name="NewStrutsActionForm" path="/actions/Register" scope="session" type="hypatia.NewStrutsAction" validate="false">
<forward name="MINOR" path="/minor.jsp"/>
<forward name="ADULT" path="/adult.jsp"/>
</action>
</action-mappings>
This application merely checks your age and sends you to an adult page, or a minor page accordingly as you are below 21 or over.
<span style="font-weight:bold;">
struts-config.xml</span>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
<struts-config>
<form-beans>
<form-bean name="NewStrutsActionForm" type="hypatia.NewStrutsActionForm"/>
</form-beans>
<global-exceptions>
</global-exceptions>
<global-forwards>
<forward name="welcome" path="/Welcome.do"/>
<forward name="NewStrutsActionForm" path="/Register.do"/>
</global-forwards>
<action-mappings>
<action name="NewStrutsActionForm" path="/actions/Register" scope="session" type="hypatia.NewStrutsAction" validate="false">
<forward name="MINOR" path="/minor.jsp"/>
<forward name="ADULT" path="/adult.jsp"/>
</action>
<action path="/Welcome" forward="/welcomeStruts.jsp"/>
</action-mappings>
<controller processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>
<message-resources parameter="com/myapp/struts/ApplicationResource"/>
<plug-in className="org.apache.struts.tiles.TilesPlugin" >
<set-property property="definitions-config" value="/WEB-INF/tiles-defs.xml" />
<set-property property="moduleAware" value="true" />
</plug-in>
<!-- ========================= Validator plugin ================================= -->
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property
property="pathnames"
value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
</plug-in>
</struts-config>
NewStrutsAction.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package hypatia;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
/**
*
* @author Champak
*/
public class NewStrutsAction extends org.apache.struts.action.Action {
/* forward name="success" path="" */
/**
* This is the action called from the Struts framework.
* @param mapping The ActionMapping used to select this instance.
* @param form The optional ActionForm bean for this request.
* @param request The HTTP Request we are processing.
* @param response The HTTP Response we are processing.
* @throws java.lang.Exception
* @return
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
NewStrutsActionForm bean=(NewStrutsActionForm)form;
if(bean.getAge()<21)
return mapping.findForward("MINOR");
else
return mapping.findForward("ADULT");
}
}
NewStrutsActionForm.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package hypatia;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
/**
*
* @author Champak
*/
public class NewStrutsActionForm extends org.apache.struts.action.ActionForm {
private String name="Missing-Name";
private int age=18;
/**
* @return
*/
public String getName() {
return name;
}
/**
* @param string
*/
public void setName(String string) {
name = string;
}
/**
* @return
*/
public int getAge() {
return age;
}
/**
* @param i
*/
public void setAge(int age) {
this.age = age;
}
/**
*
*/
public NewStrutsActionForm() {
super();
// TODO Auto-generated constructor stub
}
/**
* This is the action called from the Struts framework.
* @param mapping The ActionMapping used to select this instance.
* @param request The HTTP Request we are processing.
* @return
*/
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (getName() == null || getName().length() < 1) {
errors.add("name", new ActionMessage("error.name.required"));
// TODO: add 'error.name.required' key to your resources
}
return errors;
}
}
RegisterForm.jsp
<%--
Document : RegisterForm
Created on : Aug 27, 2010, 4:26:48 PM
Author : Champak
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body
<html:form action="/actions/Register">
Name <html:text property="name"/><br>
Age <html:text property="age"/><br>
<html:submit value="Login"/>
</html:form>
<h1>Hello World!</h1>
</body>
</html>
adult.jsp
Document : adult
Created on : Aug 27, 2010, 5:33:18 PM
Author : Champak
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>You're an adult</h1>
</body>
</html>
minor.jsp
Document : minor
Created on : Aug 27, 2010, 5:33:44 PM
Author : Champak
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>You're a minor</h1>
</body>
</html>
No comments:
Post a Comment