This
is continuation to my previous post. In my previous post, I explained how to
handle exceptions at application level using @ControllerAdvice annotation.
@ControllerAdvice
public
class GlobalExceptionHandler {
@ExceptionHandler(RuntimeException.class)
public String handleRuntimeException()
{
return "runtimeException";
}
}
You
can even achieve the same by adding below configurations in dispatcher servlet
file.
<bean
id="globalExcpetionHandlingResolver"
class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<!-- Map each exception
with correspondent jsp view -->
<property
name="exceptionMappings">
<map>
<entry
key="RuntimeException" value="runtimeException" />
</map>
</property>
<!-- Set the name of the
default error view. This view will be returned
if no specific
mapping was found. -->
<property
name="defaultErrorView" value="Exception" />
<!-- Set the log category
for warn logging. The name will be passed to
the underlying logger
implementation through Commons Logging, getting interpreted
as a log category
according to the logger's configuration. -->
<property
name="warnLogCategory" value="MVCLogger" />
</bean>
Find
the below working application.
HelloWorldController.java
package com.sample.myApp.controllers; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HelloWorldController { @RequestMapping("/welcome") public String getHelloMessage() { boolean flag = true; if (flag) { throw new RuntimeException("Throwning blindly"); } return "welcome"; } }
Create
welcome.jsp, runtimeException.jsp files under WEB-INF/jsp folder.
welcome.jsp
<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!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=ISO-8859-1"> <title>Hello World Spring Web MVC</title> </head> <body> <h1> Hello, Good Morning </h1> </body> </html>
runtimeException.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!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=ISO-8859-1"> <title>Insert title here</title> </head> <body> <h1>Run time exception occured. Please contact the Administrator. </h1> </body> </html>
Create
web.xml, HelloWorld-servlet.xml files under WEB-INF folder.
web.xml
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Spring MVC Hello WorldApplication</display-name> <servlet> <servlet-name>HelloWorld</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>HelloWorld</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
HelloWorld-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <mvc:annotation-driven /> <context:component-scan base-package="com.sample.myApp" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <bean id="globalExcpetionHandlingResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <!-- Map each exception with correspondent jsp view --> <property name="exceptionMappings"> <map> <entry key="RuntimeException" value="runtimeException" /> </map> </property> <!-- Set the name of the default error view. This view will be returned if no specific mapping was found. --> <property name="defaultErrorView" value="Exception" /> <!-- Set the log category for warn logging. The name will be passed to the underlying logger implementation through Commons Logging, getting interpreted as a log category according to the logger's configuration. --> <property name="warnLogCategory" value="MVCLogger" /> </bean> </beans>
Create
index.jsp file under webapp folder.
index.jsp
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form"%> <html> <head> <title>Welcome Page</title> </head> <body> <h2>Click on below button to get welcome page</h2> <form method="post" action="/springdemo/welcome" id="form1"> <input type="submit" value="getWelcomeMessage" style="font-size: 18px;" /> </form> </body> </html>
Project
structure looks like below.
Run
the application on server.
Click
on button ‘getWelcomeMessage’, you will be redirected to runtimeException.jsp
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