I wrote a simple spring MVC program using maven which is throwing 404 error when i click the login button to redirect - maven

Jul 18, 2017 8:45:43 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/hello-servlet.xml] Jul 18, 2017 8:45:44 PM org.springframework.web.servlet.DispatcherServlet initServletBean INFO: FrameworkServlet 'hello': initialization completed in 580 ms Jul 18, 2017 8:45:44 PM org.springframework.web.servlet.PageNotFound noHandlerFound WARNING: No mapping found for HTTP request with URI [/HelloWorld/faisal] in DispatcherServlet with name 'hello'
hello-servlet.xml

you need to load ApplicationContext.xml in web.xml file, you can use sample bellow code for adding ApplicationContext.xml in web.xml
<servlet>
<servlet-name>myServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:ApplicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

First if you want to get any response from your controller with your method declared as VOID you don't go to get any response, your method is printing in console the string faisl. Then if you want to get the index page that prints "faisal" you need to declare the controller like this:
#Controller
public class MainClass {
#RequestMapping(value="/faisal", method=RequestMethod.GET)
public ModelAndView getIndex(){
return new ModelAndView("index", "msg", "Hello Faisal");
}
}
in your hello-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:ctx = "http://www.springframework.org/schema/context"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc = "http://www.springframework.org/schema/mvc"
xsi:schemaLocation = "http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<ctx:component-scan base-package="com.faisal"></ctx:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
now the InternalViewResolver is looking for your index.jsp view that you have declared under /WEB-INF/
In your index.jsp you can do the next to print the message that you has mapped to your view:
<body>
<h1>${msg}</h1>
</body>
${msg} is the key that you are passing in the controller the value is Hello faisal then if you open the url
/HelloWorld/faisal
in your view you should be able to see Hello Faisal
Regards,

Related

No mapping found for HTTP request with URI [/FitnessTracker/]

I am getting an warnning in springmvc
as No mapping found for HTTP request with URI [/FitnessTracker/] in DispatcherServlet with name 'fitTrackerServlet'
INFO: FrameworkServlet 'fitTrackerServlet': initialization completed in 2194 ms
Feb 26, 2017 9:43:08 AM org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/FitnessTracker/] in DispatcherServlet with name 'fitTrackerServlet'
When i press url http://localhost:8080/fitnessTracker/ I am getting 404 error.
Thanks
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
<servlet-name>fitTrackerServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/servlet-config.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>fitTrackerServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<display-name>Archetype Created Web Application</display-name>
</web-app>
and my servlet-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="com.pluralsight.controller"></context:component-scan>
<!--
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
</beans>
and my controller
#Controller
public class HelloController {
#RequestMapping(value = "/greeting")
public String sayHello (Model model) {
System.out.println("Test");
model.addAttribute("greeting", "Hello WorldX");
return "hello";
}
}
Does your component-scan base-package match the package where your HelloController is in? If not, that is the problem.
<context:component-scan base-package="com.pluralsight.controller"></context:component-scan>
Configures component scanning directives for use with #Configuration
classes. Either basePackageClasses() or
basePackages() (or its alias value()) may be specified to define
specific packages to scan.
Spring does not find your HelloController and so doesn't map anything.
Otherwise you could also follow these steps.
I am wondering why you have you application configured with XML. With this tool you can start a maven project with a Spring boot application that will be, by default, already configured to build exactly what you want.
Then you only need a class with:
#RestController
#RequestMapping("/fitnessTracker")
public class HelloController {
#RequestMapping(value = "/greeting")
public String sayHello (Model model) {
System.out.println("Test");
model.addAttribute("greeting", "Hello WorldX");
return "hello";
}
}
And that's it, Spring will do the rest for you ;)
In my case the problem was that i was using this url-pattern
<url-pattern>/*</url-pattern>
instead of this
<url-pattern>/</url-pattern>
and also i had to add
#RequestMapping(value = "/fitnessTracker")
under the
#Controller
annotation.
I found the solution at : https://www.baeldung.com/spring-mvc-404-error for the pattern.

Spring controllers not found

I am unable to call spring MVC controller. Everytime I hit it, it says not found.
My files are as following.
Web.xml
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/gk1</url-pattern>
</servlet-mapping>
spring-servlet.xml
<mvc:annotation-driven />
<context:component-scan base-package="com.gkool" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/views/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
</bean>
<mvc:resources mapping="/resources/**" location="/resources/" />
</beans>
My controller file
package com.gkool;
#Controller
#RequestMapping("/score")
public class ScoreController {
Logger log = Logger.getLogger(ScoreController.class);
#RequestMapping(value = "", method = RequestMethod.GET)
public String printWelcome(ModelMap model) {
model.addAttribute("message", "Spring 3 MVC Hello World");
return "hello";
}
#RequestMapping(value = "/hello/{name}", method = RequestMethod.GET)
public ModelAndView hello(#PathVariable("name") String name) {
ModelAndView model = new ModelAndView();
model.setViewName("hello");
model.addObject("msg", name);
return model;
}
}
when I start sever and hit URL http://localhost:8080/gk1/score or http://localhost:8080/gk1/score/hello/anoop It gives error code 404 not found.
P.S. /gk1 is module name in tomcat.
When I start the tomcat server it gives following logs
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping registerHandlerMethod
INFO: Mapped "{[/score/hello/{name}],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public org.springframework.web.servlet.ModelAndView com.gkool.ScoreController.hello(java.lang.String)
Feb 07, 2017 10:37:11 PM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping registerHandlerMethod
INFO: Mapped "{[/score],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.gkool.ScoreController.printWelcome(org.springframework.ui.ModelMap)
Feb 07, 2017 10:37:12 PM org.springframework.web.servlet.handler.SimpleUrlHandlerMapping registerHandler
INFO: Mapped URL path [/resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'
That means it identifies a mapped URL as /score/hello/{name} but when I start my server in debug and put a debugger breakpoint in the controller method, the debug control doesn't come there.
can anyone please help?
Check if you've defined the context web within the tomcat configuration of your application:
<Context docBase="/path/to/myapp.war" path="/myContext" reloadable="true"/>
Now execute the request like this:
http://localhost:8080/myContext/gk1/score/hello/anoop
But if you've defined like:
<Context docBase="/path/to/myapp.war" path="/gk1" reloadable="true"/>
Then in the web.xml servlet configuration you just have to define the servlet mapping like this:
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Fix your Spring configuration.
<mvc:annotation-driven />
is a configuration element.
This is required for Spring to "find" your controllers:
<context:component-scan base-package="your.controller.package"/>
Per the Sotirios Delimanolis comment, the following configuration
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/gk1</url-pattern>
</servlet-mapping>
Tells tomcat to send requests with exactly match this URL: http://localhost:8080/gk1 to the spring servlet.
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/gk1/*</url-pattern>
</servlet-mapping>
Which tells tomcat to send any request that starts with the URL http://localhost:8080/gk1 to spring.
The * is the difference between: "exactly match" and "starts with".

Spring No mapping found for HTTP request with URI

I looked at everypost related with this problem and tried nearly all of them. I'm getting this error. I also have created an empty Spring Maven MVC project and duplicated view and controller and named them as example.jsp and ExampleController.java etc. Shortly, I can not get any respond from Tomcat. I do not know it has anything to do with it but I' also getting and error at the beginning of Console log.
Thanks in advance...
Console log beginning warning (I do not know it has an affect on this problem):
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:SpitterSpring' did not find a matching property.
Here is my actual part of error:
Tem 11, 2014 4:55:32 PM org.springframework.web.servlet.handler.SimpleUrlHandlerMapping registerHandler
INFO: Mapped URL path [/resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'
Tem 11, 2014 4:55:32 PM org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'appServlet': initialization completed in 885 ms
Tem 11, 2014 4:55:32 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Tem 11, 2014 4:55:32 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Tem 11, 2014 4:55:32 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 9260 ms
Tem 11, 2014 4:55:34 PM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/spitter/] in DispatcherServlet with name 'appServlet'
Tem 11, 2014 4:55:39 PM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/spitter/spitter/deneme] in DispatcherServlet with name 'appServlet'
Tem 11, 2014 4:55:45 PM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/spitter/deneme] in DispatcherServlet with name 'appServlet'
Tem 11, 2014 4:55:52 PM org.springframework.web.servlet.PageNotFound noHandlerFound
WARNING: No mapping found for HTTP request with URI [/spitter/deneme] in DispatcherServlet with name 'appServlet'
Here is my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets
and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/application-config.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Here is my servlet-context.xml file
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC #Controller programming model -->
<annotation-driven />
<context:component-scan base-package="com.ex.spitter.mvc" />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
</beans:beans>
Here is my com.ex.spitter.mvc -> HomeController:
package com.ex.spitter.mvc;
import java.util.Map;
import javax.inject.Inject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.ex.spitter.service.SpitterService;
#Controller
public class HomeController {
private SpitterService spitterService;
#Inject
public HomeController(SpitterService spitterService) {
this.spitterService = spitterService;
}
#RequestMapping(value = { "/", "/home" }, method = RequestMethod.GET)
public String showHomePage(Map<String, Object> model) {
model.put("spittles", spitterService.getRecentSpittles(spittlesPerPage));
return "home";
}
// <start id="spittlesPerPage"/>
public static final int DEFAULT_SPITTLES_PER_PAGE = 25;
private int spittlesPerPage = DEFAULT_SPITTLES_PER_PAGE;
public void setSpittlesPerPage(int spittlesPerPage) {
this.spittlesPerPage = spittlesPerPage;
}
public int getSpittlesPerPage() {
return spittlesPerPage;
}
// <end id="spittlesPerPage"/>
}
The problem was not solved but I changed my workspace and try to do it copy the codes. Besides, I will try to use a different version of Tomcat or install a Jboss

Sending HTML/JSON from REST Spring MVC Web app

I have developed a REST web application with Spring MVC and I can send JSON objects to a client.
I would like to construct a Javascript/AJAX client that connects to my web application but I don't know how to send the first HTML page (using JSP).
I understand I should serve JSP pages with some embedded AJAX. This AJAX will send requests to my web services.
Update:
The requirement I am not able to achieve is to write the default URI (http://localhost:8084) in browser and see the HTML page I have written in JSP page (home.jsp).
My approach is following:
I have a Controller that sends the root JSP page
#Controller
public class SessionController {
#RequestMapping(value="/", method=RequestMethod.GET)
public String homeScreen(){
return "home";
}
}
But when I run the server I receive this warning
WARNING: No mapping found for HTTP request with URI [/home] in DispatcherServlet with name 'dispatcher'
and nothing is loaded in browser.
Here is my application-context file:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<context:component-scan base-package="com.powerelectronics.freesun.web" />
<mvc:annotation-driven />
</beans>
And web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
Is my approach correct? Am I wrong at any basic concept?
Can I modify something in my code to make it run?
I would like to see the first page loaded in browser and keep going in that direction.
Thanks in advance.
Try adding a #ResponseBody annotation on the method:
#Controller
public class SessionController {
#RequestMapping(value="/", method=RequestMethod.GET)
#ResponseBody
public String homeScreen(){
return "home";
}
}
This should output home on the page.
If you'd like to use View technologies, e.g. JSP, review the following chapter on the official Spring Framework documentation: http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#view
Update
"Just as with any other view technology you're integrating with Spring, for JSPs you'll need a view resolver that will resolve your views ". If you'd like to use JSP you should then add the following to your Web application context, then return the name of the file that shall be processed:
<!-- the ResourceBundleViewResolver -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
<property name="basename" value="views"/>
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
Is the above present in your Web application context? You can review the official documentation for further information: http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#view-jsp-resolver
Place a welcome file tag in web.xml file.
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
You must be having this index.jsp outside of WEB-INF. Put following code in it.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
response.sendRedirect("home");
%>
</body>
</html>
When application is loaded, it will call index.jsp and jsp will redirect it to /home action.
Then your controller will get called.
#Controller
public class SessionController {
// see the request mapping value attribute here, it is /home
#RequestMapping(value="/home", method=RequestMethod.GET)
public String homeScreen(){
return "home";
}
}
This will call your home jsp.
If you want to to return JSON from your spring controller, then you need jackson mapper bean initialized in spring context xml file.
<beans:bean id="jacksonMessageChanger" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<beans:property name="supportedMediaTypes" value="application/json" />
</beans:bean>
<beans:bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<beans:property name="messageConverters">
<util:list id="beanList">
<beans:ref bean="jacksonMessageChanger" />
</util:list>
</beans:property>
</beans:bean>
You need to add jar or maven dependency to use jackson mapper.
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.5</version>
</dependency>
And to return JSON from controller, method would be like this :
#RequestMapping(value="/getContacts", method=RequestMethod.GET)
public #ResponseBody List<Contacts> getContacts(){
List<Contacts> contactList = prepareContactList();
return contactList;
}
This way you will get List in the success function of ajax call in the form of object and by iterating it you can get the details.
Finally I solve this only with configuring the dispatcher in web.xml on a different way.
First I added the view resolver to the servlet configuration file as David Riccitelli suggested me:
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
And then I configured the servlet mapping in web.xml:
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
That's what I was looking for, and no extra configuration is needed.
Doing this I call my root URL http://localhost:8084 and I can see the home screen I have coded in home.jsp.
Thanks for your support and suggestions.

Spring MVC: how to create a default controller for index page?

I'm trying to do one of those standard spring mvc hello world applications but with the twist that I'd like to map the controller to the root. (for example: http://numberformat.wordpress.com/2009/09/02/hello-world-spring-mvc-with-annotations/ )
So the only real difference is that they map it to host\appname\something and I'd like to map it to host\appname.
I placed my index.jsp in src\main\webapp\jsp and mapped it in the web.xml as the welcome file.
I tried:
#Controller("loginController")
public class LoginController{
#RequestMapping("/")
public String homepage2(ModelMap model, HttpServletRequest request, HttpServletResponse response){
System.out.println("blablabla2");
model.addAttribute("sigh", "lesigh");
return "index";
}
As my controller but I see nothing appear in the console of my tomcat.
Does anyone know where I'm messing up?
My web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<!-- Index -->
<welcome-file-list>
<welcome-file>/jsp/index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</context-param>
<servlet>
<servlet-name>springweb</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springweb</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
The mvc-dispatcher-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
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">
<context:annotation-config />
<context:component-scan base-package="de.claude.test.*" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
I'm using Spring 3.0.5.release
Or is this not possible and do I need to put my index.jsp back in the root of the web-inf and put a redirect to somewhere inside my jsp so the controller picks it up?
I had the same problem, even after following Sinhue's setup, but I solved it.
The problem was that that something (Tomcat?) was forwarding from "/" to "/index.jsp" when I had the file index.jsp in my WebContent directory. When I removed that, the request did not get forwarded anymore.
What I did to diagnose the problem was to make a catch-all request handler and printed the servlet path to the console. This showed me that even though the request I was making was for http://localhost/myapp/, the servlet path was being changed to "/index.html". I was expecting it to be "/".
#RequestMapping("*")
public String hello(HttpServletRequest request) {
System.out.println(request.getServletPath());
return "hello";
}
So in summary, the steps you need to follow are:
In your servlet-mapping use <url-pattern>/</url-pattern>
In your controller use RequestMapping("/")
Get rid of welcome-file-list in web.xml
Don't have any files sitting in WebContent that would be considered default pages (index.html, index.jsp, default.html, etc)
Hope this helps.
The redirect is one option. One thing you can try is to create a very simple index page that you place at the root of the WAR which does nothing else but redirecting to your controller like
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<c:redirect url="/welcome.html"/>
Then you map your controller with that URL with something like
#Controller("loginController")
#RequestMapping(value = "/welcome.html")
public class LoginController{
...
}
Finally, in web.xml, to have your (new) index JSP accessible, declare
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
We can simply map a Controller method for the default view. For eg, we have a index.html as the default page.
#RequestMapping(value = "/", method = GET)
public String index() {
return "index";
}
once done we can access the page with default application context.
E.g http://localhost:8080/myapp
It works for me, but some differences:
I have no welcome-file-list in web.xml
I have no #RequestMapping at class level.
And at method level, just #RequestMapping("/")
I know these are no great differences, but I'm pretty sure (I'm not at work now) this is my configuration and it works with Spring MVC 3.0.5.
One more thing. You don't show your dispatcher configuration in web.xml, but maybe you have some preffix. It has to be something like this:
<servlet-mapping>
<servlet-name>myServletName</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
If this is not your case, you'll need an url-rewrite filter or try the redirect solution.
EDIT: Answering your question, my view resolver configuration is a little different too:
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
It can be solved in more simple way:
in web.xml
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
After that use any controllers that your want to process index.htm with #RequestMapping("index.htm"). Or just use index controller
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
<bean name="indexController" class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />
</bean>
Just put one more entry in your spring xml file i.e.mvc-dispatcher-servlet.xml
<mvc:view-controller path="/" view-name="index"/>
After putting this to your xml put your default view or jsp file in your custom JSP folder as you have mentioned in mvc-dispatcher-servlet.xml file.
change index with your jsp name.
One way to achieve it, is by map your welcome-file to your controller request path in the web.xml file:
[web.xml]
<web-app ...
<!-- Index -->
<welcome-file-list>
<welcome-file>home</welcome-file>
</welcome-file-list>
</web-app>
[LoginController.java]
#Controller("loginController")
public class LoginController{
#RequestMapping("/home")
public String homepage2(ModelMap model, HttpServletRequest request, HttpServletResponse response){
System.out.println("blablabla2");
model.addAttribute("sigh", "lesigh");
return "index";
}
The solution I use in my SpringMVC webapps is to create a simple DefaultController class like the following: -
#Controller
public class DefaultController {
private final String redirect;
public DefaultController(String redirect) {
this.redirect = redirect;
}
#RequestMapping(value = "/")
public ModelAndView redirectToMainPage() {
return new ModelAndView("redirect:/" + redirect);
}
}
The redirect can be injected in using the following spring configuration: -
<bean class="com.adoreboard.farfisa.controller.DefaultController">
<constructor-arg name="redirect" value="${default.redirect:loginController}"/>
</bean>
The ${default.redirect:loginController} will default to loginController but can be changed by inserting default.redirect=something_else into a spring properties file / setting an environment variable etc.
As #Mike has mentioned above I have also: -
Got rid of <welcome-file-list> ... </welcome-file-list> section in the web.xml file.
Don't have any files sitting in WebContent that would be considered default pages (index.html, index.jsp, default.html, etc)
This solution lets Spring worry more about redirects which may or may not be what you like.

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