Spring boot not displaying first view

Question

I'm building a spring boot application. My problem is that when I run the project, my login page is not shown. This is my code:

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class RestLogin {

    @RequestMapping("/")
    public String login() {
        return "login";
    }
}

I get only a white page and "login" is written in it. When I try to change the @RestController with @Controller I get this GET http://localhost:8080/ 404 (). My login.html page is located under the webapp>tpl>login.html

How can I display my login page?

Edit

This is my application class

@SpringBootApplication
public class ExampleApplication extends SpringBootServletInitializer {

    private static Logger logger = LoggerFactory.getLogger(ExampleApplication.class);

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(ExampleApplication.class);
    }

    public static void main(String[] args) {

        SpringApplication.run(ExampleApplication.class, args);
    }
}

Are you working with JSPs?

ddarellis
– ddarellis

2017-04-16 21:20:34 +00:00
Commented Apr 16, 2017 at 21:20 — ddarellis
– ddarellis, Commented Apr 16, 2017 at 21:20
@Paner I'm working with angular and html

Ne AS
– Ne AS

2017-04-16 21:21:21 +00:00
Commented Apr 16, 2017 at 21:21 — Ne AS
– Ne AS, Commented Apr 16, 2017 at 21:21

ddarellis · Accepted Answer · 2017-04-16 21:46:04Z

2

I dont know your configuration but:

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.httpBasic().and().authorizeRequests()
                                         .antMatchers("/**").permitAll();
        http.authorizeRequests().antMatchers("/**").permitAll();
    }
}

In the Application.properties file add:

spring.mvc.view.suffix: .html

Change @RestController to @Controller for RestLogin class. Also put your html file inside the static folder inside resources folder.

edited Apr 16, 2017 at 21:46

answered Apr 16, 2017 at 21:40

ddarellis

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7 Comments

Ne AS Over a year ago

I tried to create a test.html in the resources>static folder, then I in the RestLogin class I did return "test" but I'm getting the same problem

Ne AS Over a year ago

When I change RestController annotation to Controller I got this GET localhost:8080 404 ()

ddarellis Over a year ago

you have to add the server context if you dont know it add server.contextPath=/server to your Application.properties file and then when you run it you should go to localhost:8080/server

Ne AS Over a year ago

Should the server.contextPath value be the same as what I have to put in the @RequestMapping ?

ddarellis Over a year ago

No, it is for the url.

|

jmhage · Accepted Answer · 2017-04-16 21:15:09Z

0

You need an application class with a main method. See this tutorial.

Here's a snippet:

package hello;

import java.util.Arrays;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
        return args -> {

            System.out.println("Let's inspect the beans provided by Spring Boot:");

            String[] beanNames = ctx.getBeanDefinitionNames();
            Arrays.sort(beanNames);
            for (String beanName : beanNames) {
                System.out.println(beanName);
            }

        };
    }

}

answered Apr 16, 2017 at 21:15

jmhage

635 bronze badges

7 Comments

jmhage Over a year ago

@Llg can you please share all of your code? It is hard to help you using only what you have provided.

jmhage Over a year ago

@Llg it appears as though Spring is unable to find your login.html file. Where is it located in your project structure?

Ne AS Over a year ago

It's under two folders in the webapp folder

jmhage Over a year ago

@Llg apologies, I see you have that in your post. You should create a resources directory and place login.html in /resources/templates/

Ne AS Over a year ago

Is spring boot only detecting files in the /ressouces/templates/ ? Is it impossible to keep them in the webapp? Excuse me I'm new to spring boot

|

Montassar El Béhi · Accepted Answer · 2017-04-16 21:36:54Z

0

This is the normal behavior.

New version of Spring web comes with @RestController annotation which nothing but @Controller + @ResponseBody. So when you have a return statement in a method you must use @RestController or annotate your method with @ResponseBody.

Here the problem is that Spring don't know a lot about the http method type, can you please try to use @GetMapping("/") to combinbe path and method at the same time.

answered Apr 16, 2017 at 21:36

Montassar El Béhi

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1 Comment

Montassar El Béhi Over a year ago

It's recommanded to have web files under src/main/resources/templates/

Moshe Arad · Accepted Answer · 2017-04-17 09:40:29Z

According to your posted code and your description, you're getting an expected behavior.

When you annotate your controller with @RestController, that means that your methods on that controller will try to return their result as JSON.

According to your code:

@RestController
public class RestLogin {

    @RequestMapping("/")
    public String login() {
        return "login";
    }
}

You're returning the String "login", that's why you're getting empty white page with the word login as JSON

If you will change the @RestController to @Controller then it no longer will return your string as JSON,

but Spring will try to figure out from the that "login" string a view, and for that you'll need to add a view resolver bean to your project.

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