trying to upgrade to Spring4 no xml configuration webapp

trying to upgrade to Spring4 no xml configuration webapp - java

I'm trying to build a little hello world WebApp prototype with Spring 4 without any xml file configuration.
Than I use tomcat 7 and here is my pom:
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
Than I have this configuration class:
#Configuration
#EnableWebMvc
#ComponentScan(basePackages = "it.spring4.configuration")
public class HelloWorldConfiguration {
#Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new
InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
and the web initializer class:
public class HelloWorldInitializer extends
AbstractAnnotationConfigDispatcherServletInitializer {
#Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { HelloWorldConfiguration.class };
}
#Override
protected Class<?>[] getServletConfigClasses() {
return null;
}
#Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
The controller:
#Controller
#RequestMapping("/")
public class HelloWorldController {
#RequestMapping(value = "/hello", method = RequestMethod.GET)
public String sayHello(ModelMap model) {
model.addAttribute("greeting", "Hello World from Spring 4 MVC");
return "welcome";
}
#RequestMapping(value = "/helloagain", method = RequestMethod.GET)
public String sayHelloAgain(ModelMap model) {
model.addAttribute("greeting", "Hello World Again, from Spring 4 MVC");
return "welcome";
}
}
and under WEB-INF the folder views that contains welcome.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>HelloWorld page</title>
</head>
<body>
Greeting : ${greeting}
</body>
</html>
This is an example found here and doesn't work. I tried other similar examples but noone works.. can you explain me were I'm wrong?
Sorry the error is:
HTTP Status 404 – Not Found
Type Status Report
Message /Spring4FullAnnotation/
Description The origin server did not find a current representation for the
target resource or is not willing to disclose that one exists.
Damn.. I don't dowload the example I just copy the code in my eclipse... I don't have a maven project, I use maven just for resolving the dependencies (I create a Dynamic Web Project after that Configure -> Convert to maven project), than I normally run it on server. I have many project built as described above with Spring4 that are perfectly working.
I don't know why I can't launch this. The code is simple and the functioning can't depends of maven configuration..
Thank you

The code is working fine for the following URL
http://localhost:8080/Spring4MVCHelloWorldNoXMLDemo-1.0.0/
Please check your URL

Related

PostMapping Spring boot annotation is not working

I am new to spring boot and do not know why my #PostMapping is not working and leading to a white label error. Everything else works fine and I can add customers to the h2 database. However, once I add customers and go to URL localhost:8084/getdetails and type 1, a white label error occurs. However, the form in the ViewCustomers.jsp file is still displayed but cannot take in any input. The form should invoke toString() of the customer object and its fields.
Controller
package com.example.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.bind.annotation.ResponseBody;
#Controller
public class FormController {
#Autowired
CustomerRepo repo;
#RequestMapping("/")
public String details() {
return "edureka";
}
#RequestMapping("/details")
public String details(Customers customers) {
repo.save(customers);
return "edureka";
}
#RequestMapping("/getdetails")
public String getdetails() {
return "ViewCustomers";
}
#PostMapping("/getdetails")
public ModelAndView getdetails(#RequestParam int cid) {
System.out.println("here");
ModelAndView mv = new ModelAndView("Retrieve");
Customers customers = repo.findById(cid).orElse(null);
mv.addObject(customers);
return mv;
}
}
edureka.jsp
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Edureka Customers</title>
</head>
<body>
<form method="post" action="details">
Enter Customer ID: <input type="text" name="cid"><br><br>
Enter Customer Name: <input type="text" name="cname"><br><br>
Enter Customer Email Address: <input type="email" name="cemail"><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
ViewCustomer.jsp
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>View Customer Details</h1>
<h2>Details as submitted as follows</h2>
<form method="getdetails" action="post">
<input type="number" name="cid"><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
Retrieve.jsp
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Retrieve Customer Details</h1>
<h2>Details as submitted as follows:</h2>
<h5>${customers}</h5>
</body>
</html>
Customers.java
package com.example.demo;
import javax.persistence.Entity;
import javax.persistence.Id;
#Entity
public class Customers {
#Id
private int cid;
private String cname;
private String cemail;
public int getCid() {
return cid;
}
public void setCid(int cid) {
this.cid = cid;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getCemail() {
return cemail;
}
public void setCemail(String cemail) {
this.cemail = cemail;
}
#Override
public String toString() {
return "Customers [cid=" + cid + ", cname=" + cname + ", cemail=" + cemail + "]";
}
}
CustomerRepo interface
package com.example.demo;
import org.springframework.data.repository.CrudRepository;
public interface CustomerRepo extends CrudRepository<Customers,Integer>{
}
SubmissionFormApplication.java
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import com.example.demo.SubmissionFormApplication;
#ComponentScan
#SpringBootApplication
public class SubmissionFormApplication extends SpringBootServletInitializer{
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SubmissionFormApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(SubmissionFormApplication.class, args);
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.13.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SubmissionForm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>SubmissionForm</name>
<description>First Spring Boot Web app</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-services</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jasper -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jasper</artifactId>
<version>9.0.31</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

The ViewCustomer.jsp form's Method should have method as post and action as get details. The problem is in html and not spring.

A few things:
Your Controller can be annotated like #RestController instead of just #Controller.
Your mappings for POST is #PostMapping - For consistency, I would recommend your mapping for GET to be #GetMapping - So I'd replace all #RequestMapping with #GetMapping (this removes ambiguity and improves readability as well)
The form in your eureka.jsp, needs to change the URL is posting to. Instead of action=details it should point to action=getdetails
The form in your view viewcustomer.jsp has the action and the post switched (the method should be POST the action should be getdetails)

The #PostMapping("/getdetails") maps to the path "/getdetails". Such a mapping already exists. Try to map to another path in order to resolve this conflict.

org.thymeleaf.templatemode.StandardTemplateModeHandlers can't be resolved

In my Spring boot API, I need to send an email using Thymeleaf.Therefore, I chose this tutorial.However, when adding ThymeleafConfig.java, STS throws the following error.
The import org.thymeleaf.templatemode.StandardTemplateModeHandlers
cannot be resolved
As stated in this answer, I changed the dependencies as follows.But it didn't solve the problem.
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.11.RELEASE</version>
</dependency>
<dependency>
<groupId>nz.net.ultraq.thymeleaf</groupId>
<artifactId>thymeleaf-layout-dialect</artifactId>
</dependency>
ThymeleafConfig.java
import java.nio.charset.StandardCharsets;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
//following import is not resolved
import org.thymeleaf.templatemode.StandardTemplateModeHandlers;
import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
#Configuration
public class ThymeleafConfig {
#Bean
public ClassLoaderTemplateResolver htmlTemplateResolver(){
ClassLoaderTemplateResolver emailTemplateResolver = new ClassLoaderTemplateResolver();
emailTemplateResolver.setPrefix("/templates/");
emailTemplateResolver.setSuffix(".html");
emailTemplateResolver.setTemplateMode(StandardTemplateModeHandlers.HTML5.getTemplateModeName());
emailTemplateResolver.setCharacterEncoding(StandardCharsets.UTF_8.name());
return emailTemplateResolver;
}
}

Use TemplateMode instead of StandardTemplateModeHandlers
import org.thymeleaf.templatemode.TemplateMode;
#Bean
public SpringResourceTemplateResolver htmlTemplateResolver(){
SpringResourceTemplateResolver emailTemplateResolver = new SpringResourceTemplateResolver();
emailTemplateResolver.setPrefix("classpath:/templates/");
emailTemplateResolver.setSuffix(".html");
emailTemplateResolver.setTemplateMode(TemplateMode.HTML);
emailTemplateResolver.setCharacterEncoding(StandardCharsets.UTF_8.name());
return emailTemplateResolver;
}
In HTML template, use th:text
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>hello</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p th:text="${name}">
</body>
</html>
When you are processing your template , use thymeleaf's TemplateEngine
import org.thymeleaf.TemplateEngine;
#Autowired
private TemplateEngine templateEngine;
Context context = new Context();
context.setVariables(mail.getModel());
String html = templateEngine.process("email-template", context);

Simple spring boot webapp doesnt work, whitelabel error page

I try run my simple "hello world" Spring Boot web application, but it doesn't work, I get "Whitelabel error page" all the time.
My Controller
package com.packt.webapp.controller;
#Controller
#RequestMapping("/")
public class HomeController {
public String home(Model model){
String welcome = new String("Witam");
model.addAttribute("welcome", welcome);
return "home";
}
}
Application.java
package com.packt.webapp.controller;
#Configuration
#EnableAutoConfiguration
#ComponentScan
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
}
home.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Test</title>
<link rel="stylesheet" th:href="#{/css/style.css}" />
</head>
<body>
<h1>Hello</h1>
<span th:text="'Message: ' + ${welcome}"></span>
</body>
</html>
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.packt.webapp</groupId>
<artifactId>basket</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.4.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
What am I doing wrong? I tried change my project structure, was playing with dependencies, nothing helps. Can somebody enlighten me?

Your home() method is most likely not being registered by spring since there is no #RequestMapping() above the method.
If you want home to be registered to /, you have two options. You can move the #RequestMapping that is currently at the class level to the home method like so...
#Controller
public class HomeController {
#RequestMapping("/")
public String home(Model model){
String welcome = new String("Witam");
model.addAttribute("welcome", welcome);
return "home";
}
}
Or you can add an addition annotation above the home() method and leave it empty.
#Controller
#RequestMapping("/")
public class HomeController {
#RequestMapping()
public String home(Model model){
String welcome = new String("Witam");
model.addAttribute("welcome", welcome);
return "home";
}
}

Based on your comments above, you're accessing the wrong url. Since you've mapped your controller to / and you only have the 1 method, you should access it like:
http://localhost:8080/

Thymeleaf (th:replace) not working

Hello I'm new in Thymeleaf and encountered a problem that might be trivial, but thymeleaf don't behave like it supposed to be. Just a little help will be much appreciated
I don't use spring boot for the matters of learning. Additionally, I am also pretty new to Spring. Might miss one or two things.
I have simple index.html like this
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Index 2</title>
</head>
<body>
<div th:replace="~{fragments/fragment1 :: fr1}"></div>
</body>
</html>
and fragment1.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
</head>
<body>
<div th:fragment="fr1"><h1>HERE IS FRAGMENTS 1</h1></div>
</body>
</html>
Supposedly it does resolve the template, but the result doesn't change at all.
here is what i get from the browser page source
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Index 2</title>
</head>
<body>
<div th:replace="~{fragments/fragment1 :: fr1}"></div>
</body>
</html>
and yes it exactly the same as raw index.html.
So I figured it might have something to do with the configuration, but it just looks fine for me. In my other learning project, it just works fine with the exactly same configuration.
Here is the configuration
/* package and imports */
#Configuration
#EnableWebMvc
#ComponentScan("com.eshop")
public class WebConfig extends WebMvcConfigurerAdapter {
private static final String UTF8 = "UTF-8";
private static final String VIEWS = "/WEB-INF/templates/";
private static final String RESOURCES_LOCATION = "/resources/";
private static final String RESOURCES_HANDLER = RESOURCES_LOCATION + "**";
//Thymeleaf Configuration
#Bean
public ITemplateResolver templateResolver() {
SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
resolver.setPrefix(VIEWS);
resolver.setSuffix(".html");
resolver.setTemplateMode(TemplateMode.HTML);
resolver.setCacheable(false);
return resolver;
}
#Bean
public SpringTemplateEngine templateEngine(){
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(templateResolver());
templateEngine.setDialect(new SpringSecurityDialect());
return templateEngine;
}
#Bean
public ViewResolver viewResolver(){
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setTemplateEngine(templateEngine());
viewResolver.setCharacterEncoding(UTF8);
return viewResolver;
}
// tells DispatcherServlet to give static resources and not handle the resources itself
#Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
// handle various resources like javascript and css
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler( RESOURCES_HANDLER ).addResourceLocations( RESOURCES_LOCATION );
}
}
pom.xml
<!-- thymeleaf -->
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
<version>3.0.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity4</artifactId>
<version>3.0.0.RELEASE</version>
</dependency>
here is the project tree
webapp
|__resources
|__WEB-INF
|__i18n
|__templates
|__fragments
|__fragment1.html
|__index.html
What do I miss here and how can I fix this?

Try calling the th:replace without ~{}
<div th:replace="fragments/fragment1 :: fr1"></div>
Also make sure you have separate html file named fragment1.html
This Layouts tutorial should help you get going.

simple AJAX JQuery example gives me 500 internal server error

hi i'm working in a spring mvc project and i'm getting this error when i hit the button in my form
500 (Internal Server Error) jquery.min.js:6
x.ajaxTransport.x.support.cors.e.crossDomain.send jquery.min.js:6
x.extend.ajax AddUser:19
doAjaxPost AddUser:41
onclick
i'm trying to do a simple AJAX JQuery example that adds users to a list but i get that error when i press the add button in my form
this is my controller class:
#Controller
public class UserListController {
private List<User> userList = new ArrayList<User>();
#RequestMapping(value="AddUser",method=RequestMethod.GET)
public String showForm(){
return "AddUser";
}
#RequestMapping(value="AddUser",method=RequestMethod.POST)
public #ResponseBody String addUser(#ModelAttribute(value="user") User user, BindingResult result )
{
String returnText;
if(!result.hasErrors())
{
userList.add(user);
returnText = "User has been added to the list. Total number of users are " + userList.size();
}
else
{
returnText = "Sorry, an error has occur. User has not been added to list.";
}
return returnText;
}
#RequestMapping(value="ShowUsers")
public String showUsers(ModelMap model)
{
model.addAttribute("Users", userList);
return "ShowUsers";
}
}
and this is my AddUser.jsp page
<%# 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>Add Users using ajax</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<!-- <script src="resources/js/libs/jquery-2.0.2.min.js"></script> -->
<script type="text/javascript">
function doAjaxPost() {
// get the form values
var name = $('#name').val();
var education = $('#education').val();
$.ajax({
type: "POST",
url: "AddUser",
data: "name=" + name + "&education=" + education,
success: function(response){
// we have the response
$('#info').html(response);
$('#name').val('');
$('#education').val('');
},
error: function(e){
alert('Error: ' + e);
}
});
}
</script>
</head>
<body>
<h1>Add Users using Ajax ........</h1>
<table>
<tr><td>Enter your name : </td><td> <input type="text" id="name"><br/></td></tr>
<tr><td>Education : </td><td> <input type="text" id="education"><br/></td></tr>
<tr><td colspan="2"><input type="button" value="Add Users" onclick="doAjaxPost()"><br/></td></tr>
<tr><td colspan="2"><div id="info" style="color: green;"></div></td></tr>
</table>
Show All Users
</body>
</html>
and my MvcConfiguration class since i'm using a java based configuration and not using XML
#EnableWebMvc
#Configuration
#ComponentScan(basePackages = { "controllers" })
public class MvcConfig extends WebMvcConfigurerAdapter
{
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
#Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
// JSP VIEW-RESOLVER
#Bean
public InternalResourceViewResolver jspViewResolver() {
InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setOrder(2);
bean.setPrefix("/WEB-INF/views/");
bean.setSuffix(".jsp");
return bean;
}
}
EDIT: i starter a new project just for the sake of trying to know what error i'm having, i delete spring secuirty in my application, but i still can figure out whats wrong.
1) i actually dont delete spring security i just starte a new project to try to solve my url problem
2) i change my controllers and the URL attribute in my ajax script
new RequestMapping controllers:
#RequestMapping(value="AddUser",method=RequestMethod.GET)
i deleted the "/" in the value="AddUser"
i dont have a "/" in any of my controllers if put a "/" in the controllers i have the same 500 Internal server error

This might be because of the CSRF protection which is enabled by default in Java configuration. Try in your configuration...
#Override
protected void configure(HttpSecurity http) throws Exception {
http
// ...
.csrf().disable();
}
Let me know if this works.
EDIT**
To include CSRF token in AJAX request, if you are using JSON, you need to put it on the http header. Sample JSP example typically would be...
<html>
<head>
<meta name="_csrf" content="${_csrf.token}"/>
<meta name="_csrf_header" content="${_csrf.headerName}"/>
</head>
Then in your javascript call, get this parameters and add it to XMLHttpRequest's header.
Hope this helps.
Further reading

In my case, i had to add the below dependency to my pom
<dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.2.2</version> </dependency>

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

trying to upgrade to Spring4 no xml configuration webapp - java

The code is working fine for the following URL http://localhost:8080/Spring4MVCHelloWorldNoXMLDemo-1.0.0/ Please check your URL

Related

PostMapping Spring boot annotation is not working

org.thymeleaf.templatemode.StandardTemplateModeHandlers can't be resolved

Simple spring boot webapp doesnt work, whitelabel error page

Thymeleaf (th:replace) not working

simple AJAX JQuery example gives me 500 internal server error

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