Declarative Exception Handling and Exception Handling in Struts Framework

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Declarative Exception Handling  and Exception Handling in Struts Framework 
Directory Structure of ExceptionHandlingExample in Struts 1.3 Using MyEclipse IDE

 index.jsp

<%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
 
<html>
<head>
<title><bean:message key="label.title" /></title>
</head>
<body>
<h3><bean:message key="label.header" /></h3>
<html:form action="/exceptionExAction">
<bean:message key="label.name" /> :
<html:text property="name" size="20" maxlength="20"/> <br/><br/>
<html:submit><bean:message key="label.submit" /></html:submit>
<html:reset><bean:message key="label.reset" /></html:reset>
</html:form> 
</body>
</html>

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
 
<web-app>
  <display-name>Maven Struts Examples</display-name>
 
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>
        org.apache.struts.action.ActionServlet
    </servlet-class>
    <init-param>
        <param-name>config</param-name>
        <param-value>
         /WEB-INF/struts-config.xml
        </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
 
  <servlet-mapping>
       <servlet-name>action</servlet-name>
       <url-pattern>*.do</url-pattern>
  </servlet-mapping>
 
</web-app>

struts-config.xml

<?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="myDynaForm"   
		      type="org.apache.struts.action.DynaActionForm">
		      <form-property name="name" type="java.lang.String"/>
		</form-bean>
	</form-beans>
 
    <global-exceptions>
	    <exception
	      key="error.exception.message"
	      type="java.io.IOException"
	      handler="org.r4r.struts.MyExceptionHandler"
	      path="/failed.jsp" />
	</global-exceptions>
	
	<action-mappings>

	    <action
			path="/exceptionEx"
			type="org.apache.struts.actions.ForwardAction"
			parameter="/index.jsp"/>
 
		<action
			path="/exceptionExAction"
			type="org.r4r.struts.MyExceptionAction"
			name="myDynaForm"
			>
			
		</action>
	</action-mappings>
 
	<message-resources
		parameter="org.r4r.struts.ApplicationResources" />
 
</struts-config>

MyExceptionHandler.java

package org.r4r.struts;
 
import javax.servlet.ServletException;
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;
import org.apache.struts.action.ExceptionHandler;
import org.apache.struts.config.ExceptionConfig;
 
public class MyExceptionHandler extends ExceptionHandler{
	@Override
	public ActionForward execute(Exception ex, ExceptionConfig ae,
			ActionMapping mapping, ActionForm formInstance,
			HttpServletRequest request, HttpServletResponse response)
			throws ServletException {
		
		return super.execute(ex, ae, mapping, formInstance, request, response);
	}
 
}

MyExceptionAction.java

package org.r4r.struts;
 
import java.io.IOException;

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.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessages;
 
public class MyExceptionAction extends Action{
 
	public ActionForward execute(ActionMapping mapping,ActionForm form,
		HttpServletRequest request,HttpServletResponse response) 
        throws Exception {
 
		ActionMessages errors = new ActionMessages();
	    saveErrors(request,errors);
	    
	    throw new IOException();
	}
 
}

ApplicationResources.properties

#common module error message
error.exception.message = This Exception Message Generated By Struts 1.3 Exception Handler Example
label.name = User Name
label.submit = Submit
label.reset = Reset
error.name.required = User Name Resquired
label.title = Struts 1.3 Exception Handler Example
label.header = Struts 1.3 Exception handler Example

failed.jsp

<%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>

<%@page import="org.apache.struts.Globals"%>
<html>
<head>
<title><bean:message key="label.title" /></title>
</head>
<body>
<h3><bean:message key="label.header" /></h3>
<div style="color: red;">
<html:errors/>
</div>
</body>
</html>

Output





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