MappingDispatchAction:
MappingDispatchAction(org.apache.struts.actions.MappingDispatchAction) is one of the Built-in Actions provided along with the struts framework.
The org.apache.struts.actions.MappingDispatchAction class is a subclass of org.apache.struts.actions.DispatchAction class. This class enables a user to collect related functions into a single action class. It needs to create multiple independent actions for each function.
MappingDispatchAction class contains multiple methods ie.. add() , edit() , search() , save() . Here all the methods are taking the same input parameters but each method returns a different ActionForward like "add" in case of add() method , "edit" in case of edit() etc. Each ActionForward is defined in the struts-config.xml file
Step1:
Develop a index.jsp file for ALL
Operations
<%@taglib
uri="http://struts.apache.org/tags-html" prefix="html"
%>
<html:link action="add">ADD
USER</html:link><BR></br>
<html:link action="update">UPDATE
USER</html:link><br></br>
<html:link action="delete">DELETE
USER</html:link>
Step2:
Develop a Forms and given a proper
action value
Add User form
<%@taglib
uri="http://struts.apache.org/tags-html" prefix="html"
%>
<html:form
action="addExecute">
Name:<html:text property="sname"/><br></br>
Password:<html:password
property="spassword"/><br></br>
Address:<html:textarea
property="address"/><br></br>
<html:submit value="REGISTER"/
</html:form>
<br></br>
<a
href="index.jsp">HOME</a>
Update User form
<%@taglib uri="http://struts.apache.org/tags-html"
prefix="html" %>
<html:form
action="updateExecute">
Name:<html:text property="sname"/><br></br>
Password:<html:password
property="spassword"/><br></br>
Address:<html:textarea
property="address"/><br></br>
<html:submit value="UPDATE"/></html:form> <br></br> <a
href="index.jsp">HOME</a>
Delete User
<%@taglib
uri="http://struts.apache.org/tags-html" prefix="html"
%>
<html:form
action="deleteExecute">
Name:<html:text property="sname"/><br></br>
<html:submit
value="DELETE"/>
</html:form> <br>
<br></br>
<a
href="index.jsp">HOME</a>
Step4:
Develop a Form Bean class and it is Configured in Struts configuration file
package com.dustbin.formbean;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
public class StudentFormBean extends
org.apache.struts.action.ActionForm {
private
String sname;
private
String spassword;
private
String address;
public
String getAddress() {
return address; }
public
void setAddress(String address) {
this.address = address;
System.out.println("fb...."+address);
}
public
String getSname() {
return sname;
}public void setSname(String sname) {
this.sname = sname;
System.out.println("fb...."+sname);
}
public
String getSpassword() {
return spassword;
} public void setSpassword(String spassword)
{
this.spassword = spassword;
}
}
Step5:Develop a action Controller and configure in struts
configuration file
package com.dustbin.controller;
import com.dustbin.formbean.StudentFormBean;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class StudentAction extends
org.apache.struts.actions.MappingDispatchAction {
public
ActionForward addExecute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
System.out.println("calling addExecute()....");
StudentFormBean sfb=(StudentFormBean)form;
String name=sfb.getSname();
String pwd=sfb.getSpassword();
String address=sfb.getAddress();
System.out.println("hai2....");
request.setAttribute("name",name);
return mapping.findForward("success");
}
public
ActionForward updateExecute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
System.out.println("hai....");
StudentFormBean sfb=(StudentFormBean)form;
String name=sfb.getSname();
String pwd=sfb.getSpassword();
String address=sfb.getAddress();
request.setAttribute("name",name);
System.out.println("hai2....");
return mapping.findForward("success");
}
public
ActionForward deleteExecute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
StudentFormBean sfb=(StudentFormBean)form;
String name=sfb.getSname();
request.setAttribute("name",name);
return mapping.findForward("success");
}
}
Step6:This
is for both Struts Form Bean class and Action class both are configured in
struts-config.xml file
<?xml version="1.0"
encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration
1.3//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_3.dtd">
<struts-config>
<form-beans>
<form-bean name="StudentFormBean"
type="com.dustbin.formbean.StudentFormBean"/>
</form-beans>
<global-exceptions>
</global-exceptions>
<global-forwards>
<forward name="success" path="/success.jsp"
redirect="false"/>
<forward
name="welcome"
path="/Welcome.do"/>
</global-forwards>
<action-mappings>
<action parameter="addExecute" validate="true"
name="StudentFormBean" path="/addExecute"
scope="request"
type="com.dustbin.controller.StudentAction"/>
<action parameter="updateExecute" validate="true"
name="StudentFormBean" path="/updateExecute"
scope="request" type="com.dustbin.controller.StudentAction"/>
<action parameter="deleteExecute" validate="true"
name="StudentFormBean" path="/deleteExecute"
scope="request" type="com.dustbin.controller.StudentAction"/>
<action path="/add"
type="org.apache.struts.actions.ForwardAction" parameter="/add.jsp"/>
<action path="/update"
type="org.apache.struts.actions.ForwardAction"
parameter="/update.jsp"/>
<action
path="/delete"
type="org.apache.struts.actions.ForwardAction"
parameter="/delete.jsp"/>
<action path="/Welcome"
forward="/welcomeStruts.jsp"/>
</action-mappings>
<controller
processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>
<message-resources
parameter="com/myapp/struts/ApplicationResource"/>
</struts-config>
Step7:This
is for Forms success page after
operation performed success.jsp page
<h3>
Sucess..<br>
</br>
<%=request.getAttribute("name")%>
</h3>
Output:
Download WAR File CLICK HERE (WAR FILE)
DOWNLOAD RAR FILE CLICK HERE (RAR FILE)
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