getting 404 when consumiing spring controller service

Question

I have created a spring application (Spring version 3.2.8). The application is working fine but the issue which I am facing is that when I try to consume the controller service through url I am getting 404 error

The url which I try to consume through browser url is given below, which I expect to return a test string

http://localhost/Spring3Sample/user/getPersonDetails

My code is as given below

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" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
          p:prefix="/" p:suffix=".jsp" />
</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" 
    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.controllers" />

</beans>

UserController.java

package com.controllers;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/user")
public class UserController {

    private static final String APP_JSON = "application/json";

    @RequestMapping(value = "/getPersonDetails", method = RequestMethod.GET, produces = APP_JSON)
    public String getPersonDetails() {
        return "test";
    }
}

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/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>Spring3Sample</display-name>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <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>*.do</url-pattern>
    </servlet-mapping>

    <session-config>
        <session-timeout>1</session-timeout>
    </session-config>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
</web-app>

Can anyone please tell me some solution for this

UPDATE 1

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/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
    <display-name>Spring3Sample</display-name>
:
:
:

Answer 1

You have mapped the DispatcherServlet with URL pattern as

 <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>

Whenever you want t request a controller method you must have to add this URL pattern to the request. So that Spring will find the correct mapping this.

So change your request URL to following:-

http://localhost:8080/Spring3Sample/user/getPersonDetails.do

As you expect to return a test string:

Add the

@ResponseBody

annotation to ur controller's method. So that Spring wouldn't look for the JSP page with name test, instead return test as String.

EDIT:

From the discussion in chat:

Also u are missing <mvc:annotation-driven /> in applicationContext.xml.

To remove *.do from the request URL:

<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

Answer 2

After observing your applicationContext.xml , I can see you are missing <mvc:annotation-driven/> Your Updated code will look like below

<?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-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">                                            

    <context:component-scan base-package="com.controllers" />
    <mvc:annotation-driven/>  

</beans>

Explanation

<annotation-driven /> means that you can define spring beans dependencies without actually having to specify a bunch of elements in xml or implement an interface or extend a base class.Means @Controller tells spring that the the class specified contains methods that will handle http requests without you having to implement the Controller interface or extend a subclass that implements controller.

<context:component-scan base-package="com.controllers" /> tells spring that it should search the class path for all the classes under com.controllers and look at each class to see if it has a @Controller, or @Repository, or @Service, or @Component and if it does then Spring will register the class with the bean factory as if you have defined in in the xml configuration files

As per user comment

do we need both applicationContext.xml and dispatcher-servlet.xml

Actually Spring lets you define multiple contexts in a parent-child hierarchy.

applicationContext.xml defines the beans for the root webapp context means the context associated with the webapp.

dispatcher-servlet.xml defines the beans for one servlet's application context. There can be many dispatcher-servlet.xml in a webapp i.e servlet1-servlet.xml for servlet spring1, spring2-servlet.xml for servlet spring2

note:: Beans in spring-servlet.xml can reference beans in applicationContext.xml, but not vice versa.

Answer 3

• You missed port number in your URL
• Use this URL http://localhost:8080/Spring3Sample/user/getPersonDetails

Answer 4

First in Spring MVC manual

The @Controller annotation acts as a stereotype for the annotated class, indicating its role. The dispatcher scans such annotated classes for mapped methods and detects @RequestMapping annotations (see the next section).

So delete this

@RequestMapping("/user")

Because it makes no sense next

@RequestMapping("/user/getPersonDetails")

you should note I add "/user" to url. Also you are not return any jSon. First if I were you I change second request mapping (on the method getUserDetails) with string I put in this answer.

And looks like you miss with config files... Check this string in web.xml

<url-pattern>*.do</url-pattern>

it will dispatch only urls with ".do" at their end.

Answer 5

I added this to my config class that extends WebMvcConfigurer:

  @Bean
    public ViewResolver viewResolver() {
        final InternalResourceViewResolver bean = new InternalResourceViewResolver();

        bean.setViewClass(JstlView.class);
        bean.setPrefix("/WEB-INF/view/pages/");
        bean.setSuffix(".jsp");

        return bean;
    }

You'll have to add this dependency for it to work:

<dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
</dependency>