Unable to render the JSP using Spring Boot - java

i 'm new in spring boot and i wanted to start with a simple example however nothing seemed to work
this my controller:
Package controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class testController {
RequestMapping("view/aboutus")
public String greeting(Model model) {
model.addAttribute("name", "azertyyyy");
return "aboutus"; }}
and this is the jsp view:
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%# taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<!DOCTYPE>
<html> <body> ${name}
<p>hello world</p> </body></html>
i added the needed dependencies:
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
and i added the prefix and suffix in application.properties
when i run the application only hello world is shown on the view without the name variable, after searching here i changed the view directory from src/main/webapp/view to src/main/resource/templates but spring boot couldn't find the view anymore

I am not sure if you are fully aware of the changes we have to make when we want to run the application as war package.
Change the packing to war from jar and require dependencies.
Change the main application class to extend SpringBootServletInitializer and implement configure()
Define your jsp pages path in application properties
Put JSPs in correct path (webapp/WEB-INF/jsp check screen shot)
Directory Structure for the project
Following is the code changes I have to done to run the JSP
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.test</groupId>
<artifactId>Test_Exception_Framework</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Test_Exception_Framework</name>
<description>Project to test ExceptionFramework</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Need this to compile JSP -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
<version>4.6.1</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.5.201505241946</version>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Main Class
package com.exception;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
#SpringBootApplication
public class SpringBootWebApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(SpringBootWebApplication.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SpringBootWebApplication.class);
}
}
Rest Controller - which redirects to JSP
package com.exception.controller;
import java.util.Map;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
#RestController
#RequestMapping(method = RequestMethod.GET)
public class TestExceptionController {
#RequestMapping("/")
public String welcome(Map<String, Object> model) {
System.out.println("in controller");
model.put("message", "hello spring boot");
return "welcome";
}
}
application.properties - define the path for JSPs
server.port=8085
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp

1)*** use spring version 2.0.3.RELEASE or less
2) add the dependency
<!-- Need this to compile JSP -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
3) this optional dependency
<!-- JSTL for JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<scope>provided</scope>
</dependency>

Related

Why I getting 404 error on my Vaadin app in azure?

I'm trying to run Vaadin app on azure and I constantly getting error 404. It's basic app with only 2 classes - from spring initializr and one my class.
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class WsbProjektZalApplication {
public static void main(String[] args) {
SpringApplication.run(WsbProjektZalApplication.class, args);
}
}
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
public class ServletInitializer extends SpringBootServletInitializer {
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(WsbProjektZalApplication.class);
}
}
And one my class
import com.vaadin.flow.component.html.H1;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;
#Route("/co")
public class ListView extends VerticalLayout {
public ListView() {
add(new H1("dziaƂa chyba totto"));
}
}
My pom file is default and I wasn't editing it.
?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>2.7.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>zaliczenie</groupId>
<artifactId>wsb-projekt-zal</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>wsb-projekt-zal</name>
<description>wsb-projekt-zal</description>
<properties>
<java.version>17</java.version>
<vaadin.version>23.0.10</vaadin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</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.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>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
I'm trying to run this app with war artifacts on tomcat 9. Problems occur only with Vaadin, I can run this app locally without any problems. Can somebody help me and tell me where I'm making mistake?
Screen of error below.
enter image description here
Try to resolve the error by adding the following in $TOMCAT_HOME/conf/server.xml
To avoid memory leaks, Tomcat disables the loading of Java driver files by default.
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" driverManagerProtection="false" />
Also, if you're creating a spring boot application, add "SpringBootServletInitializer" to your main file, as seen in the code below. As without SpringBootServletInitializer, Tomcat will see it as a regular application rather than a Spring boot application.
#SpringBootApplication
public class DemoApplication extends *SpringBootServletInitializer*{
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(DemoApplication .class);
}
public static void main(String[] args) {
SpringApplication.run(DemoApplication .class, args);
}
}
References:
The origin server did not find a current representation for the target resource or is not willing to disclose that one exists ,
Tomcat 404 error: The origin server did not find a current representation for the target resource or is not willing to disclose that one exists [duplicate]

"Circular view path would dispatch back to the current handler URL." when using Spring Boot and Thymeleaf

When using Spring Boot and Thymeleaf, when trying to accessing the /home URL I am getting the following:
ServletException: Circular view path [home]: would dispatch back to the current handler URL [/home] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
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>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>watchlist</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>watchlist</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-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>
main/java/com.demo.WatchlistApplication.java:
package com.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class WatchlistApplication {
public static void main(String[] args) {
SpringApplication.run(WatchlistApplication.class, args);
}
}
main/java/com.demo.controller.HomeController.java:
package com.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;
#Controller
public class HomeController {
#GetMapping("/home")
public ModelAndView home() {
return new ModelAndView("home");
}
}
main/resources/templates/home.html:
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta name="viewport" content="width = device-width, initial-scale = 1, shrink-to-fit = no">
<title>Web app</title>
</head>
<body>
<p th:text="'Hello world'"></p>
</body>
</html>
Annotate you controller class "HomeController" with annotation #RestController instead #Controller.
Seems duplicate of Circular View path error Spring boot
For springboot 2.6.0, Try controller:
#Controller
public class HomeController {
#GetMapping("/home")
public String home() {
return "home"; // be same as the template file name (without suffix)
}
}
You should have resources/templates/home.html.
Make sure the spring-boot-starter-thymeleaf has been downloaded successfully.

Publishing Springboot webapp on AWS 404 index error

I'm trying to learn Java and I've done a Springboot application using Eclipse and Maven. I started downloading the base from https://start.spring.io/ and then I created my first controller and jsp index page. But when I try to package it in war and publish it on AWS elasticbeanstalk I had this error:
Sat Oct 05 09:42:45 UTC 2019
There was an unexpected error (type=Not Found, status=404).
/WEB-INF/jsp/index.jsp
I state that:
- When I run the web app on my computer it works perfectly!
- I've already set on AWS (in the custom variables) to change the port on 5000
This is the project structure
portfolio
- src
- main
- java
- resources (where i have static and application.properties
- webapp
- WEB-INF
- jsp
- index.jsp
pom.xml
This is the pom.xml
<?xml version="1.0" encoding="UTF-8"?>
https://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
war
org.springframework.boot
spring-boot-starter-parent
2.1.9.RELEASE
com.sofidis
portfolio
0.0.1-SNAPSHOT
portfolio
Portfolio project for Spring Boot
<properties>
<java.version>1.8</java.version>
</properties>
<repositories>
<repository>
<id>spring-milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jasper -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jasper</artifactId>
<version>9.0.26</version>
<!-- aggiunto per creare il war -->
<scope>provided</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-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</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>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
</dependencies>
<!-- plugin repository aggiunto per compilare il war -->
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<url>https://repo.spring.io/snapshot</url>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
</pluginRepositories>
<build>
<plugins>
<!-- precedente <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId>
</plugin> -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
This is the application.properties
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
This is my the main controller PortfolioApplication.java
package com.sofidis.portfolio;
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 PortfolioApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(PortfolioApplication.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(PortfolioApplication.class);
}
}
This is my HomeController
import com.sofidis.portfolio.model.*;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class HomeController
{
#RequestMapping(value = "/")
public String index( HttpSession session)
{
PageMeta ptitle = new PageMeta();
String titlepagina= ptitle.getPtitle("index");
session.setAttribute("pagetitle", titlepagina);
PageMeta pdesc = new PageMeta();
String descpagina= pdesc.getPdescription("index");
session.setAttribute("pagedescription", descpagina);
return "index";
}
}
And this is the index.jps
<%# page isELIgnored="false"%>
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>${pagetitle}</title>
<meta name="description" content="${pagedescription}">
<jsp:include page="./includes/common_head.jsp" />
</head>
<body>
<p>Hello World</p>
</body>
</html>
Thank you very much for help!! I'm desperate :((
Under WEB-INF you should only place classes, libraries, web.xml. The JSPs should be placed on the same level as WEB-INF, not under WEB-INF. In your case it should be as follows:
webapp
WEB-INF
...
jsp
index.jsp
Afterwards there can also other problems. But first change the structure.

JSP and Spring Boot

I trying to build a simple welcome page (in jsp) using Spring Boot.
Below is the project structure
Application
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
public SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
}
APIController
#Controller
public class APIController {
#RequestMapping("/")
public String home() {
System.out.println("testing");
return "welcome";
}
}
When I access http://localhost:8080/, I get below error
This application has no explicit mapping for /error, so you are seeing
this as a fallback.
Wed May 23 15:31:51 MYT 2018 There was an unexpected error (type=Not
Found, status=404). No message available
By curl
{"timestamp":1527061233703,"status":404,"error":"Not Found","message":"No message available","path":"/"}
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>
<artifactId>spring-boot-web-jsp</artifactId>
<packaging>war</packaging>
<name>Spring Boot Web JSP Example</name>
<description>Spring Boot Web JSP Example</description>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- This is a web application -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Optional, test for static content, bootstrap CSS-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Package as an executable jar/war -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
You have to define the prefix and suffix for you jsp file in application.properties file like following:
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
In directory \src\main\resources\static, Create a simple index.html file
<html>
<head>Hello, Bich Van</head>
<body>
<h3>Today is a rainny day</h3>
</body>
</html>
Then try again at http://localhost:8080
If you don't like static HTML files, you can use JSP, but need a little complicate. You need declaring JSP View resolver in Spring MVC configuration.
Reference document: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-developing-web-applications.html#boot-features-spring-mvc-welcome-page
Ensure that you have jasper and jstl in the list of dependencies:
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
Here is a working starter project - https://github.com/spring-projects/spring-boot/tree/master/spring-boot-samples/spring-boot-sample-web-jsp
It's better to use thymeleaf in your spring boot project and add the following dependency
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
In directory \src\main\resources\template, Create a simple index.html file

Issue in running springboot MVC project

when trying to run my first HelloWorld app with springBoot and Tomcat Embeded I get the following exception :
org.springframework.beans.factory.BeanDefinitionStoreException: Failed
to read candidate component class nested exception is
java.lang.IllegalStateException: Could not evaluate condition on org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$EmbeddedDatabaseConfiguration
due to org/springframework/dao/DataAccessException not found. Make
sure your own configuration does not rely on that class. This can also
happen if you are #ComponentScanning a springframework package (e.g.
if you put a #ComponentScan in the default package by mistake)
Here is my entry point Example class config:
#SpringBootApplication
public class Example extends SpringBootServletInitializer
{
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application)
{
return application.sources(Example.class);
}
public static void main(String[] args) throws Exception
{
SpringApplication.run(Example.class, args);
}
}
Here is my WelcomeController class:
package controler;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.Map;
#Controller
public class WelcomeController
{
// inject via application.properties
#Value("${welcome.message:test}")
private String message = "Hello World";
#RequestMapping("/")
public String welcome(Map<String, Object> model)
{
model.put("message", this.message);
return "welcome";
}
}
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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springBoot</groupId>
<artifactId>SpringbootHelloword</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Tomcat embedded container-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- JSTL for JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Need this to compile JSP -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<!-- Need this to compile JSP,
tomcat-embed-jasper version is not working, no idea why -->
<dependency>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
<version>4.6.1</version>
<scope>provided</scope>
</dependency>
<!-- Optional, test for static content, bootstrap CSS-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
</dependencies>
</project>
i changed the server port because it was used by another app and it works correctly.

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