Question 42559 in Html Question posted in
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Return Html page using RestController in Spring Boot

I am trying to get the HTML page that I created. This is the structure of my project:

enter image description here

This is the "IndexController" class:

@RestController
@AllArgsConstructor
@RequestMapping(path = "/webpage")
public class IndexController {

        @GetMapping(path = {"mainpage"})
        @ResponseBody
        public String index(){
            return "Index";
        }
    
        @PostMapping("/check")
        public String CheckDataset(@ModelAttribute CheckModel checkModel){
            System.out.println(checkModel);
            return null;
        }
    
    }

When I open the HTML webpage directly from intellij:

enter image description here

Is opening perfectly, but when I am trying to open the HTML from Spring Boot is returning just the "Index" String.

Do you have any idea how to solve this?

Tags:

2

Answers


  1. 0

    To return the HTML page (view), you have to use Spring MVC, i.e. @Controller instead of @RestController and return ModelAndView with index as a view name:

    @Controller
@AllArgsConstructor
@RequestMapping("/webpage")
public class IndexController {

    @GetMapping(path = {"mainpage"})
    public ModelAndView index() {
        final var modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        return modelAndView;
    }

    // other methods
}
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  2. 0

    Please note that your class IndexController shall not have @RestController if you need to show an HTML page. It shall only have @Controller.

    In simple terms @RestController = @Controller + @ResponseBody

    In your case, the @RestController annotation you used makes all the methods within it @ResponseBody by default, and you don’t have to explicitly mention

    @ResponseBody annotation doesn’t show the view instead it sends a String response.

    Steps to fix this issue:

    1. Change @RestController annotation to @Controller in class level
    2. Remove @ResponseBody from the method in which you’re planning to show the HTML

    So your code will be

    @Controller
@AllArgsConstructor
@RequestMapping(path = "/webpage")
public class IndexController {

    @GetMapping(path = {"mainpage"})
    public String index(){
        return "Index";
    }

   //Other methods
    
}

    Just make sure you have spring-boot-starter-thymeleaf dependency in your POM.xml

    Thanks.

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