I am new to MVC.
I am trying to build a simple hello world application using Spring MVC.
I am getting 404 error as href doesn't goes to hello.jsp. I have my hello.jsp under my WEB-INf and index,jsp is under Web apps. Below is my code for the application. Thank you all in advance
#Controller
public class HelloController {
#RequestMapping(value = "/hello",method = RequestMethod.POST)
public ModelAndView mymethod(){
return new ModelAndView("hello","msg","Hello First Spring");
}
}
/////////////////////////// spring.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"
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.javatpoint"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
///////////////////////// 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">
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/.jsp</url-pattern>
</servlet-mapping>
</web-app>
//////////////////////////// index.jsp ////////////////////////////
<html>
<body>
<h2>Hello World!</h2>
<%= java.util.Calendar.getInstance().getTime() %>
click here
</body>
</html>
//////////////////////////// hello.jsp /////////////////////////
Message is: ${msg}]
[1]: https://i.stack.imgur.com/XUJ9j.png
Change your controller to GET
#RequestMapping(value = "/hello",method = RequestMethod.GET)
public ModelAndView mymethod(){
return new ModelAndView("hello","msg","Hello First Spring");
}
Also change your web.xml
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
Related
I have created a Rest API. I was testing it on postman yesterday and it was working fine, today it keeps returning a 404, the file paths haven't changed so that can't be wrong. I am using tomcat, and my xampp is on.
It postman is returning the correct data for another application I have.
The path I am trying to test is
http://localhost:8080/Assignment2C/breweries
the method I'm trying to test is
#RestController
#RequestMapping("/breweries")
public class Breweries_Controller {
#Autowired
Breweries_Service service;
#GetMapping(produces = MediaTypes.HAL_JSON_VALUE)
public Resources<Breweries> getAllBreweries() {
List<Breweries> allBreweries = service.getAllBreweries();
for (Breweries b : allBreweries) {
int id = b.getResourceId();
Link self = linkTo(this.getClass()).slash(id).withSelfRel();
b.add(self);
linkTo(methodOn(this.getClass()).getBrewerie(id));
}
Link link = linkTo(this.getClass()).withSelfRel();
Resources<Breweries> result = new Resources<Breweries>(allBreweries, link);
return result;
}
I am using JPA to connect to the database.
the project structure is
the config file is
<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-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<context:component-scan base-package="Assignment2C" />
<mvc:annotation-driven />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/views</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
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_3_0.xsd"
version="3.0">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/sd4-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
try to give path to the get mapping also
#GetMapping("/getAll")
you url will should look like
this:
http://localhost:8080/Assignment2C/breweries/getAll
Or
http://localhost:8080/2C/breweries/getAll
if i set the base_package to
<context:component-scan base-package="main" />
it works
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"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>withDiffServletName</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>example</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>example</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
example-servlet.xml
<beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:context = "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-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.app.simple" />
<mvc:annotation-driven />
<bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "prefix" value = "/" />
<property name = "suffix" value = ".jsp" />
</bean>
</beans>
controller
#Component
public class ConrrollController
{
#RequestMapping(value = "/student", method = RequestMethod.GET)
public ModelAndView student() {
return new ModelAndView("student", "command", "hi");
}
}
index.jsp
/student
student.jsp
hi
hi all,
i am new in spring ,this is my 1 st program an getting an error
org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/webroot/student] in DispatcherServlet with name 'sample'.
please provide me solution.an and encourage me .
i didnt understood
Why does Spring MVC respond with a 404 and report "No mapping found for HTTP request with URI [...] in DispatcherServlet"?
No handler mapping is came because the controller not returning view .
So we need to change #controller not #components
1.Below is my ajax call in index.jsp
<script type="text/javascript">
$(document).ready(function(){
$('#buttonDemo1').click(function(){
$.ajax({
method: "GET",
url: '${pageContext.request.contextPath}/ajax/demo1',
success: function(result){
$('#result1').html(result);
},
error: function(response){
console.log("error");
}
});
});
});
</script>
2.Below is controller's code
#Controller
#RequestMapping("/ajax")
public class AjaxController {
#RequestMapping(method = RequestMethod.GET)
public String index() {
return "ajax/index";
}
#RequestMapping(value="/demo1", method = RequestMethod.GET)
#ResponseBody
public String demo1() {
return "Demo 1";
}
}
3. Below is dispatcher's code
<?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?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:mvc="http://www.springframework.org/schema/mvc"
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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.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-4.0.xsd">
<context:component-scan base-package="demo.controller" />
<mvc:annotation-driven/>
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<!--
Most controllers will use the ControllerClassNameHandlerMapping above, but
for the index controller we are using ParameterizableViewController, so we must
define an explicit mapping for it.
-->
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<!--
The index controller.
-->
<bean name="indexController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />
Below is web.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>*.htm</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>redirect.jsp</welcome-file>
</welcome-file-list>
</web-app>
I don't know what's wrong, whenever I'm hitting controller's path in ajax I get "GET http://localhost:8080/ajax/demo1 404 (Not Found)" error. Please help me out where I'm wrong. I've tried few solutions but they didn't resolve issue.
Try to add the application name to the url,
http://localhost:8080/[AppName]/ajax/demo1
I do this lesson but my controller don't work error 404, before it worked well. jsp files work well. does't work only controller. The console has no errors.
What happened?
Controller:
#Controller
public class HelloController {
#RequestMapping(value = "/hello", method = RequestMethod.GET)
public String printHello(ModelMap model) {
model.addAttribute("message", "Hello Spring MVC Framework!");
return "hello";
}
}
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"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>Servlets</display-name>
<servlet>
<servlet-name>HelloWeb</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>HelloWeb</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
</web-app>
HelloWeb-servlet.xml:
<beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:context = "http://www.springframework.org/schema/context"
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">
<context:component-scan base-package = "com.tutorialspoint" />
<bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "prefix" value = "/WEB-INF/jsp/" />
<property name = "suffix" value = ".jsp" />
</bean>
</beans>
hello.jsp
<html>
<head>
<title>Hello Spring MVC</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
Folder structure
A couple of things I'm noticing.
1) An <?xml tag declaration within a web.xml file is actually not allowed. Your JSP editor within Eclipse should have indicated an error. Please remove <?xml version="1.0" encoding="UTF-8"?>
2) I think you are running into issues between default servlet container handlers and mappings for the Dispatcher servlet. Can you change the servlet mapping in your web.xml file from
<servlet-mapping>
<servlet-name>HelloWeb</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
to
<servlet-mapping>
<servlet-name>HelloWeb</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
which is the default handling for Spring dispatcher.
I would perform those changes, perform a rebuild of your project, redeploy to your container and try hitting your controller mapping http://<yourhost_root>/HelloWeb/hello/
Can any one help me with this error? I am using Tomcat 9.0.0.M20 as the server in my Spring project.
HTTP Status [404] – [Not Found]
Type Status Report
Description The origin server did not find a current representation for the Target resource or is not willing to disclose that one exists.
Apache Tomcat/9.0.0.M20
Here is my code:
home.jsp
<%# page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>maventest2</title>
</head>
<body>
<h1>MavenTest2 Spring demo</h1>
</body>
</html>
Here is the 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_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Here is the Dispatcher servlet (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/cache"
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/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<context:component-scan base-package="com.springhello"/>
<mvc:annotation-driven/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
Here is the Spring controller (HelloController.java):
package com.springhello.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class HelloController {
#RequestMapping("/")
public String home(){
return "home";
}
}