Thymeleaf security is not rendering to html

Thymeleaf security is not rendering to html - java

I am using spring boot from spring.start.io
I have a problem where my view(thymleaf) doesn't render sec: tags to proper html
my pom.xml file
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>security</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<thymeleaf.version>3.0.2.RELEASE</thymeleaf.version>
<thymeleaf-layout-dialect.version>2.2.0</thymeleaf-layout-dialect.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-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.modelmapper</groupId>
<artifactId>modelmapper</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity4</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
My thymeleaf template
<!DOCTYPE html>
<html lang="en"
xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
<th:block th:replace="~{fragments/main-page-fragments:: htmlHeadTag}">
</th:block>
<body>
<th:block th:replace="~{fragments/main-page-fragments:: navBar}">
</th:block>
<h1>Home</h1>
<div sec:authentication="name"></div>
<div sec:authorize="hasRole('ROLE_ADMIN')">
Za Admina
</div>
<div sec:authorize="hasRole('ROLE_USER')">
Za user
</div>
<div sec:authentication="name"></div>
<div sec:authorize="hasRole('ADMIN')">
Za Admina
</div>
<div sec:authorize="hasRole('USER')">
Za user
</div>
<th:block th:replace="~{fragments/main-page-fragments:: bootstrapScripts}">
</th:block>
</body>
</html>
And the result is this: http://imgur.com/a/t0uNv
What exactly have i done wrong? I even have intellisence for the roles, i linked the correct dependecies i link the sec xml tag as well.

You don't need to use sec: extension for simple Spring Security integration.
Conditional block depending on role:
<div th:if="${#request.isUserInRole('ADMIN')}">
Za Admina
</div>
Print username:
<div th:text="${#request.userPrincipal.name}"></div>

i think it's caused by not having the spring security dialect added to the TemplateEngine. I'm not sure how you set up your WebMvcConfig, but as an example:
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.extras.springsecurity4.dialect.SpringSecurityDialect;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
import org.thymeleaf.templateresolver.TemplateResolver;
import org.thymeleaf.templateresolver.UrlTemplateResolver;
#Configuration
#EnableScheduling
#EnableTransactionManagement
public class WebMvcConfig extends WebMvcConfigurerAdapter {
#Bean
public TemplateResolver templateResolver() {
TemplateResolver templateResolver = new ClassLoaderTemplateResolver();
templateResolver.setPrefix("views/");
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode("HTML5");
templateResolver.setCacheable(false);
return templateResolver;
}
#Bean
public UrlTemplateResolver urlTemplateResolver() {
return new UrlTemplateResolver();
}
#Bean
public SpringTemplateEngine templateEngine() {
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.addTemplateResolver(templateResolver());
templateEngine.addTemplateResolver(urlTemplateResolver());
templateEngine.addDialect(new SpringSecurityDialect());
return templateEngine;
}
#Bean
public ViewResolver thymeleafViewResolver() {
ThymeleafViewResolver vr = new ThymeleafViewResolver();
vr.setTemplateEngine(templateEngine());
vr.setCharacterEncoding("UTF-8");
vr.setOrder(Ordered.HIGHEST_PRECEDENCE);
return vr;
}
}
Greetings
Marian
#Edit:
I added a complete Example of an WebMvcConfig. For this Example the Views would be located in Resources/views, but you can ofc set it up however you'd like to.

Related

How to fix 404 Error when deploying SpringBoot App to AWS Elastic Beanstalk?

I'm trying to deploy a very basic Spring Boot web app to AWS Elastic Beanstalk, It works fine locally, but each time I try to run it on elastic beanstalk I get a 404 error.
Here is my Controller:
package com.example.springhelloworld;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class HelloWorldController {
#RequestMapping("/")
public String returnHello(){
return "helloworld";
}
}
Here is my main class:
package com.example.springhelloworld;
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;
#SpringBootApplication
public class SpringHelloWorldApplication extends SpringBootServletInitializer{
public static void main(String[] args) {
SpringApplication.run(SpringHelloWorldApplication.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(SpringHelloWorldApplication.class);
}
}
Here is my html template:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Spring App</title>
</head>
<body>
<h3>Welcome to Spring Hello World!</h3>
</body>
</html>
Here is my 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>3.0.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringHelloWorld</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringHelloWorld</name>
<description>SpringHelloWorld</description>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</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-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This is my project structure:
I also set server port to 5000 in application.properties file.
I generated the war file using maven and uploaded to Elastic Beantalk using a Tomcat 8.5 platform with Corretto 11. However when I try to access my application I get a 404 error. I'm trying to figure out why this is happening.

Thymeleaf: org.thymeleaf.exceptions.TemplateInputException

i am trying to use thymeleaf with spring mvc java based configuration.Then use JPA to connect to H2DB.
When I boot spring boot and connect to "http: // localhost: 8080 /", I get the following error.
I can't get to "index.html".
template "index": An error happened during template parsing (template: "class path resource [templates/index.html]")
org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/index.html]")
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'Book' available as request attribute
Controller Class
package com.example.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import com.example.demo.model.Book;
import com.example.demo.repository.Repository;
import lombok.RequiredArgsConstructor;
#RequiredArgsConstructor
#Controller
public class BookController{
private final Repository repository;
#GetMapping("/")
public String index(Model model) {
return "index";
}
#PostMapping("/add")
public String addBook(#ModelAttribute Book book) {
repository.save(book);
return "redirect:/";
}
}
model class
package com.example.demo.model;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import lombok.Getter;
import lombok.Setter;
#Getter
#Setter
#Entity
public class Book {
#Id
#GeneratedValue
private Long id;
private String title;
private String detail;
}
□repository interface
package com.example.demo.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import com.example.demo.model.Book;
public interface Repository extends JpaRepository <Book, Long>{
}
index.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>H2DB</title>
</head>
<body>
<form th:action="#{/add}" th:object="${Book}" method="post">
<label for="title">title：</label> <input type="text" th:field="*{itle}">
<label for="detail">detail：</label> <input type="text"
th:field="*{detail}">
<button>登録する</button>
</form>
</body>
</html>
My 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>2.5.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>H2DB</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>H2DB</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</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-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
I use Eclipse Version: 2021-09 (4.21.0)

Try to pass an empty book object in the index method by the Model. I think then you can fill it with data.

Unable to configure a simple Controller in Spring boot project

All i am trying to do is print a simple Hello world message , using a JSP page but when i try to do it,i get a 404 not found error as shown below
this is my project structure, shown in the above diagram
package com.example.MailSender;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication(scanBasePackages = {"com.example.MailSender","com.example.MailSender.Controller"})
public class MailSenderApplication {
public static void main(String[] args) {
SpringApplication.run(MailSenderApplication.class, args);
}
}
the main application class is as shown above
package com.example.MailSender.Controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
#RequestMapping("/hello")
public class SimpleController {
#GetMapping("/world")
public String sample()
{
return "sample";
}
}
A very simple controller that i coded is shown above
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Hello world</title>
</head>
<body>
<h1>Basic config successful!!!</h1>
<h2>Hello World</h2>
</body>
</html>
A very simple JSP page to show the message
server.port=9090
spring.mvc.view.prefix=/src/main/resources/static
spring.mvc.view.suffix=.jsp
this is the application.properties file
<?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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>MailSender</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>MailSender</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
the pom.xml file
i am unable to understand where i am going wrong, please help me out, why am i getting a 404 error ??
i belive http://localhost:9090/hello/world is a valid url

I see two issues.
You need to add this dependency to your pom file
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
/src/main/resources/static is meant to hold static files such as html and css
Create directory src/webapp/WEB-INF/jsp
Move your jsp into the above directory
Update prefix spring.mvc.view.prefix=/WEB-INF/jsp/
https://hellokoding.com/spring-boot-hello-world-example-with-jsp/

Put samples.jsp in "resources/templates"

You muste enable the mvc configuration. Create a class config :
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
#EnableWebMvc
#Configuration
public class Config {
}
https://www.logicbig.com/tutorials/spring-framework/spring-web-mvc/spring-enablewebmvc-annotation.html

Repeatedly getting WhiteLabel error page w/ Mapping specification

I'm new to Spring. I am currently following a tutorial to the T and ran into the "Whitelabel error page". I've done my research, checking Spring boot - Whitelabel Error Page and Spring Boot Remove Whitelabel Error Page with no luck.
I am trying to reach the page by simply using : http://localhost:8080/hello
Obviously Spring cannot find the page, but I cannot figure out why that is.
My html file:
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Thymeleaf demo</title>
</head>
<body>
<p th:text="'time on the server is: ' + ${theDate}" />
</body>
</html>
Pom file:
<?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>2.2.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.cat.otsGrief</groupId>
<artifactId>GriefReconcile</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>GriefReconcile</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Java class:
package com.cat.ots.controllers;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
#Controller
public class DemoController {
#GetMapping("/hello")
public String sayHello(Model theModel) {
theModel.addAttribute("theDate", new java.util.Date());
return "helloworld";
}
}
File Structure:
Any help is appreciated
EDIT:
answer I was looking is found here - Issue With Spring: There was an unexpected error (type=Not Found, status=404)
Add component scanning for packages that are not in the same package, or in sub-packages, of the main class.

you have to configure viewResolver and internalResourceView Resolvers to serve jsp/html files find the below code snippet go through the link
package com.howtodoinjava.app.controller;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
#Configuration
#EnableWebMvc
#ComponentScan
public class MvcConfiguration extends WebMvcConfigurerAdapter
{
#Override
public void configureViewResolvers(ViewResolverRegistry registry) {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/view/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
registry.viewResolver(resolver);
}
}

Java Spring boot controller #RequestParam gives error "Required String parameter 'name' is not present"

I'm building an app using Spring boot. The problem started when I was trying to upload a file to server and thought this was a MultipartFile problem. But then I tried submitting a simple form with POST method to Spring #Controller and it got the same error. After hours of searching I could not find anything similar.
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="/webjars/bootstrap/4.1.3/css/bootstrap.min.css"/>
<script type="text/javascript" src="/webjars/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="/webjars/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<title>Title</title>
</head>
<body>
<div class="container">
<div class="card">
<div class="card-body">
<div class="offset-3 col-6">
<form method="post"
action="/save">
<input type="text" class="form-control" name="name">
<input type="submit" class="btn btn-primary" value="Save">
</form>
</div>
</div>
</div>
</div>
</body>
</html>
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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tantsurepertuaar</groupId>
<artifactId>tantsurepertuaar</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>tantsurepertuaar</name>
<description></description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<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-security</artifactId>-->
<!--</dependency>-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</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-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<!--<dependency>-->
<!--<groupId>org.springframework.security</groupId>-->
<!--<artifactId>spring-security-test</artifactId>-->
<!--<scope>test</scope>-->
<!--</dependency>-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.3.1</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.1.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Controller
package com.tantsurepertuaar.tantsurepertuaar.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
#Controller
public class TestController {
#RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(#RequestParam("name") String name) {
return "redirect:/";
}
}
When I check browser developer tools then I can see that in FormData there is a parameter called "name" and it has the entered value.
When I use GET method then I had no problems using #RequestParam.
Can it be that it has something to do with my project configuration or am I missing something completely here?
Thanks

The #RequestParam annotation you are using is for GET paramaters (passed via the URL), in order to retrieve the values of a POST parameter you have to use the #RequestBody annotation.
So your code should be like this:
#Controller
public class TestController {
#RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(#RequestBody("name") String name) {
return "redirect:/";
}
}

package com.tantsurepertuaar.tantsurepertuaar.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
#Controller
public class TestController {
#RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(#ModelAttribute String name) {
return "redirect:/";
}
}
try this?

if you redirect and want to use #Requestparam value that you get from 'form' in the redirect address ..
you need to use Redirectattributes .
#RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(#RequestParam("name") String name,RedirectAttributes redirectAttributes) {
redirectAttributes.addFlashAttribute("name","name");
return "redirect:/";
}
#RequestMapping(value = "/", method = RequestMethod.GET)
public String homeMethod(#ModelAttribue("name") String name){
return "name";
}
ModelAttribute will help you get that redirectflashattributes ..

Develop Reference

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

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