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Properly configure dispatcher-servlet, applicationContext and web.xml

First time using Spring (and new to MVC architecture as well) and Apache Tomcat and I'm able to load my index just fine after following a few videos/tutorials, but now that I'm trying to add other pages, I keep getting a 404 error. Here's what I have so far and the project structure is below as well for reference. The mapping of resources also seems to not be working as my index isn't loading images/js/etc.
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<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>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern></url-pattern>
</servlet-mapping>
</web-app>
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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven/>
<context:component-scan base-package="org.hackathon_10_20.EasySub.controller"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<mvc:resources mapping="/resources/**" location="/WEB-INF/theme/startbootstrap-new-age-gh-pages/" cache-period="31556926"/>
</beans>
applicationContext.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
IndexController.java
package org.hackathon_10_20.EasySub.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
/**
* Created by Chris Bonilla on 10/20/2018.
*/
#Controller
public class IndexController {
#GetMapping("/")
public String index(Model m) {
m.addAttribute("someAttribute", "someValue");
return "index";
}
}
SubPlanController.java
package org.hackathon_10_20.EasySub.controller;
import org.hackathon_10_20.EasySub.domain.SubPlan;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;
import java.util.Map;
import java.util.HashMap;
#Controller
public class SubPlanController {
Map<Long, SubPlan> subPlanMap = new HashMap<>();
#RequestMapping(value ="/subplan", method = RequestMethod.GET)
public ModelAndView showForm() {
return new ModelAndView("subPlanHome", "SubPlan", new SubPlan());
}
#RequestMapping(value = "/subplan/{Id}", produces = { "application/json", "application/xml"}, method = RequestMethod.GET)
public #ResponseBody SubPlan getSubPlanById(#PathVariable final long Id) {
return subPlanMap.get(Id);
}
#RequestMapping(value = "/addSubPlan", method = RequestMethod.POST)
public String submit(#ModelAttribute("SubPlan") final SubPlan subplan, final BindingResult result, final ModelMap model) {
if (result.hasErrors()) {
return "error";
}
//model.addAttribute("name", subplan.getName());
//subPlanMap.put(subplan.getId(), subplan);
return "subPlanView";
}
}

You're missing a url-pattern value in your web.xml. It is empty.
Just change it to:
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

Java - HTTP Status 404 – Not Found

I'm studying spring mvc and want to test some very simple annotation-based controllers,It works fine on home page but when I enter /home/user it gives me HTTP Status 404 – Not Found error and I haven't found anything to fix it.
web.xml
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.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>
<welcome-file-list>
<welcome-file>redirect.jsp</welcome-file>
</welcome-file-list>
</web-app>
dispatcher-servlet.xml
<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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="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">
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<context:component-scan base-package="spring" />
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--<bean id="viewResolver"
</beans>
HomeController.java
package spring.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
#Controller
//#RequestMapping(value = "/home")
public class HomeController {
#RequestMapping(value = "/home", method = RequestMethod.GET)
public String showHomeMessage() {
return "home";
}
}
UserController.java
package spring.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
#Controller
#RequestMapping("/home/user")
public class UserController {
#RequestMapping(method = RequestMethod.GET)
public String welcomeMessage(){
return "user";
}
}
redirect.jsp just uses sendRedirect() method and redirects to home.jsp.
home.jsp and user.jsp just prints a simple hello message
Where I'm doing wrong?
Regards

Have you tried nesting the RequestMapping? Something like this...
#Controller
#RequestMapping(value = "/home")
public class HomeController {
#RequestMapping(method = RequestMethod.GET)
public String showHomeMessage() {
return "home";
}
#RequestMapping(value = "/user", method = RequestMethod.GET)
public String welcomeMessage(){
return "user";
}
}
I'm not sure if you need to put a value on showHomeMessage (i.e. value="/").

After looking through this little example, I think your issue is tied to the fact that you are not specifying the #ResponseBody using the #Controller annotation. Whereas, if you use the #RequestController annotation simply implying a String type would be sufficient because it combines the use of #Controller and #ResponseBody
#Controller
#RequestMapping("/home/user")
public class UserController {
#RequestMapping(method = RequestMethod.GET)
public #ResponseBody String welcomeMessage(){
return "user";
}
}
The alternative to the same block would be...
#RestController
#RequestMapping("/home/user")
public class UserController {
#RequestMapping(method = RequestMethod.GET)
public String welcomeMessage(){
return "user";
}
}
Of course this little example doesnt demonstrate MediaType and so forth, but hopefully you get the idea.

Spring test No mapping found for HTTP request with URI [/accueil] in DispatcherServlet with name ''

Hello I'm trying to test one of my class but I have this warning when i do mvn test : No mapping found for HTTP request with URI [/accueil] in DispatcherServlet with name ''.
This is strange because I have access to this page outside of the test.
here is the class that I want to test (I can access it via localhost:8080/accueil) :
package uVote.controllers;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import uVote.DAO.ScrutinDAO;
import uVote.model.Scrutin;
import uVote.model.Votant;
#Controller
#RequestMapping(value = "/accueil")
public class Accueil
{
#RequestMapping(method = RequestMethod.GET)
public String accueil(Model model,HttpServletRequest request)
{
Votant co = VerifCo.isConnecte(request);
if(co == null)
return "redirect:connexion";
else
{
request.setAttribute("votant", co);
List<Scrutin> scrutins = new ScrutinDAO().getToutScrutins();
List<Scrutin> scrutinsToShow = new ArrayList<Scrutin>();
for(Scrutin s : scrutins)
{
if(!s.estDansRegistre(co) || s.isTermine())
scrutinsToShow.add(s);
}
request.setAttribute("scrutins", scrutinsToShow);
}
return "accueil";
}
#RequestMapping(method = RequestMethod.POST)
public String deconnection(Model model,HttpServletRequest request)
{
VerifCo.deconnecteVotant(request);
return "redirect:accueil";
}
}
and here is the test case :
package uVote.controllers;
import java.util.HashMap;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.ResultMatcher;
import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;
import org.springframework.test.web.servlet.setup.DefaultMockMvcBuilder;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import uVote.model.Votant;
#RunWith(SpringJUnit4ClassRunner.class)
#WebAppConfiguration
#ContextConfiguration(classes = uVote.controllers.Accueil.class)
/**
*
* #author kirua
*/
public class AccueilTest
{
#Autowired
private WebApplicationContext wac;
private MockMvc mockMvc;
#Before
public void setup()
{
DefaultMockMvcBuilder builder = MockMvcBuilders.webAppContextSetup(this.wac);
this.mockMvc = builder.build();
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/vues/");
viewResolver.setSuffix(".jsp");
this.mockMvc = MockMvcBuilders.standaloneSetup(new HelpController())
.setViewResolvers(viewResolver)
.build();
}
#Test
public void testVotant() throws Exception
{
HashMap<String, Object> sessionattr = new HashMap<String, Object>();
Votant vo = new Votant(1, "toto_prenom", "toto_nom", "toto_adresse", "mdp");
sessionattr.put("votant", vo);
ResultMatcher ok = MockMvcResultMatchers.status().isOk();
// ResultMatcher msg = MockMvcResultMatchers.model()
// .attribute("msg", "Spring quick start!!");
MockHttpServletRequestBuilder builder = MockMvcRequestBuilders.get("/accueil").sessionAttrs(sessionattr);
this.mockMvc.perform(builder)
.andExpect(ok)
.andExpect(view().name("accueil"));
// .andExpect(msg);
}
}
and the HelpController :
public class HelpController extends AbstractController
{
private static Log log = LogFactory.getLog(HelpController.class);
#Override
protected ModelAndView handleRequestInternal(HttpServletRequest hsr, HttpServletResponse hsr1) throws Exception
{
log.debug("Entering HelpController.handleRenderRequestInternal()");
ModelAndView modelAndView = new ModelAndView("Help");
log.debug("Exiting HelpController.handleRenderRequestInternal() " + modelAndView);
return modelAndView;
}
}
my 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>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/root-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<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/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>
my servlet-context.xml :
<?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">
<!-- Anable du model #Controller -->
<annotation-driven />
<!-- Gère les requète d'éléments de ressource (css / js / images ...) -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Résolution des vues utilisées (renvoyées) par les controller - Rendu/Intepretation JSP -->
<beans:bean id="viewReslover" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> -->
<beans:property name="prefix" value="/vues/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="uVote.controllers" />
</beans:beans>
and my root-context :
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
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.xsd">
</beans>
Do you have an idea of what is happening ? I'm a noob in java so I'm not sure where could be the problem.
Please ask if you need to see some other file.

No mapping found for HTTP request with URI [/LoginApp/] in DispatcherServlet with name 'java4s'

Earlier my code was working but now I am facing this error
Sometimes the code works and sometimes it does not work.
My code is
Java4sController.java
package java4s;
import javax.validation.Valid;
import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServlet;
//import javax.servlet.*;
import javax.servlet.http.*;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.sql.*;
//import org.h2.jdbcx.JdbcConnectionPool;
//import org.springframework.security.core.context.SecurityContextHolder;
#Controller
public class Java4sController {
HttpSession session;
String uname="",pass="";
Statement stmt;
Connection conn;
#RequestMapping(value="displayForm.html", method=RequestMethod.GET)
public String helloWorld(UserDetails ud,HttpServletRequest request,HttpServletResponse response) {
return "loginPage";
}
#RequestMapping("/login")
public String loginCheck(#Valid UserDetails userDetails, BindingResult result, ModelMap model,HttpServletRequest request,HttpServletResponse response)throws Exception
{
System.out.println("In the login page");
String username=userDetails.getUser();
String password=userDetails.getPassword();
if (result.hasErrors()) {
return "loginPage";
}
try {
Class.forName("org.h2.Driver");
conn = DriverManager.
getConnection("jdbc:h2:file:C:/Users/patilv/test", "sa", "");
// add application code here
if(conn!=null) {
System.out.println("No connection");
}
stmt=conn.createStatement();
String sql="Select * FROM table1 WHERE username='"+username+"' AND password='"+password+"' ";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next())
{
uname=rs.getString("username");
pass=rs.getString("password");
if (result.hasErrors()) {
return "loginPage";
}
else if(username.equals(uname)&&password.equals(pass))
{
//session.invalidate();
response.setHeader("Cache-Control","no-cache");
response.setHeader("Cache-Control","no-store");
response.setDateHeader("Expires", 0);
response.setHeader("Pragma","no-cache");
session = request.getSession(); // create session
session.setAttribute("username", username);
session.setAttribute("password", password);
//String str1=(String)session.getAttribute(username);
model.addAttribute("lfobj", userDetails);
//model.addAttribute(str1);
conn.close();
return "success";
}
else
{
conn.close();
return "loginPage";
}
}
}finally{
//finally block used to close resources
try{
if(stmt!=null)
conn.close();
}catch(SQLException se){
}// do nothing
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}//end finally try
}//end try
return "abcd";
}
#RequestMapping(value="logoutform", method=RequestMethod.GET)
public String helloWorld1(UserDetails ud,HttpServletRequest request,HttpServletResponse response) {
System.out.println("\nabcdef\n");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Cache-Control","no-store");
response.setDateHeader("Expires", 0);
response.setHeader("Pragma","no-cache");
String username=ud.getUser();
// String password=ud.getPassword();
HttpSession session1;
session1=request.getSession(false);
System.out.println("Session :"+session1.getAttribute("username"));
if(session1!=null)
{
//session1.removeAttribute(username);
session1.invalidate();
Cookie[] cookies = request.getCookies();
for (Cookie cookie : cookies) {
cookie.setMaxAge(0);
cookie.setValue(null);
cookie.setPath("/");
response.addCookie(cookie);
}
System.out.println("invalidating session");
//session1.invalidate();
}
return "logoutsuccess";
}
}
web.xml
<?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/j2ee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_ID" version="2.4">
<servlet>
<servlet-name>java4s</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>java4s</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
java4s-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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:component-scan base-package="java4s" />
<mvc:annotation-driven />
<!-- <mvc:resources mapping="/scripts/**" location="/WEB-INF/" /> -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/page/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="props" />
</bean>
</beans>
My directory structure is

Your code has couple of typos.
1.URL is not uniform
displayForm.html
/login
logoutForm
2.In web.xml mapping is not proper
<url-pattern>*.jsp</url-pattern>
So solution is maintain one format or change the mapping.
In web.xml
<url-pattern>/</url-pattern>
and use any format like *.html,*.action,*.do.
Add / to all RequestMappings like /displayForm.html,/logoutForm
And the Error is No mapping found for HTTP request with URI [/LoginApp/]
Reason is there is no request mapping for /. Write one method to handle / request and place index.jsp under WEB-INF/pages.
#RequestMapping(value="/", method=RequestMethod.GET)
public String loadApp(UserDetails ud,HttpServletRequest request,HttpServletResponse response) {
return "index";
}
UPDATE :
Try by mentioning the java4s-servlet.xml in web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/java4s-servlet.xml
</param-value>
</context-param>

No mapping found for HTTP request with URI in spring? [duplicate]

This question already has answers here:
Why does Spring MVC respond with a 404 and report "No mapping found for HTTP request with URI [...] in DispatcherServlet"?
(13 answers)
Closed 6 years ago.
I am new to Spring. I am stuck in one problem although I have looked this in various sites and followed the question that are here with this topic but still I am not able to find a solution.
I'm getting this error
No mapping found for HTTP request with URI [/ReadingsMVC/] in DispatcherServlet with name 'spring'
My web.xml is-
<?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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Spring3MVC</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
My Spring-Servlet is-
<?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:context="http://www.springframework.org/schema/context"
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">
<context:component-scan
base-package="com.abc.reading.controller"/>
<bean id="viewResolver"
class="/WEB-INF/jsp/.*jsp">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
My Java Rest Controller code is
package com.lucidtechsol.reading.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;
import com.abc.reading.utilities.RandomNumberGenerator;
#RestController
public class ReadingController {
#RequestMapping("/reading")
public String getReading() throws NegativeNumberException, InvalidRangeException {
return new Integer(new RandomNumberGenerator().generateRandomNumber(100, -50)).toString();
}
}
My TestRandomNumberGenerator is
package com.abc.testcase;
import static org.junit.Assert.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;
import com.abc.reading.utilities.RandomNumberGenerator;
public class TestRandomNumberGenerator {
int upper;
int lower;
RandomNumberGenerator generator;
/**
* #throws java.lang.Exception
*/
#Before
public void setUp() throws Exception {
generator = new RandomNumberGenerator();
}
/**
* #throws java.lang.Exception
*/
#After
public void tearDown() throws Exception {
generator = null;
}
#Test
public void testPositive() {
upper = 10;
lower = 5;
try {
assertTrue(upper >= generator.generateRandomNumber(lower, upper));
} catch (NegativeNumberException | InvalidRangeException e) {
e.printStackTrace();
}
}
#Test(expected = NegativeNumberException.class)
public void testNegativeNumberException() throws NegativeNumberException,
InvalidRangeException {
upper = 10;
lower = -5;
generator.generateRandomNumber(lower, upper);
}
#Test(expected = InvalidRangeException.class)
public void testInvalidRangeException() throws NegativeNumberException,
InvalidRangeException {
upper = 30;
lower = 10;
generator.generateRandomNumber(lower, upper);
}
}
My exception java file are-
InvalidException
/**
*
*/
package com.abc.reading.exception;
/**
* #author kuppusamys
*
*/
public class InvalidRangeException extends Exception {
/**
*
*/
private static final long serialVersionUID = 4348179544370409821L;
public InvalidRangeException() {
super();
}
public InvalidRangeException(String message) {
super(message);
}
}
NegativeException
/**
*
*/
package com.abv.reading.exception;
/**
* #author kuppusamys
*
*/
public class NegativeNumberException extends Exception {
/**
*
*/
private static final long serialVersionUID = -7903564384519771246L;
public NegativeNumberException() {
super();
}
public NegativeNumberException(String message) {
super(message);
}
}
RandomNumberGenerator is
import java.util.Random;
import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;
public class RandomNumberGenerator {
public int generateRandomNumber(int upper, int lower) throws NegativeNumberException, InvalidRangeException {
if (lower < 0) {
throw new NegativeNumberException(
"Lower bound of range is negative -->" + lower);
}
if (upper < 0) {
throw new NegativeNumberException(
"Upper bound of range is negative -->" + upper);
}
if (upper < lower) {
throw new InvalidRangeException("Upper bound of range -->" + upper
+ " is smaller than lower bound of range -->" + lower);
}
return lower + new Random().nextInt(upper - lower);
}
}
My .jsp file is- Hello
<%# page language="java" contentType="text/html; charset=UTF-8"
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>spring mvc</title>
</head>
<body>
${message}
</body>
</html>
I am not understanding what I am doing wrong. Please help me!
if you don't understanding please comment

Try with http://localhost:8080/reading
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 Web MVC Application</display-name>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
mvc-dispatcher-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
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-2.5.xsd">
<bean class="com.abc.reading.controller.ReadingController" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>