Spring 启动 URL 映射

Question

I was trying to research this specific problem online but I don't really know what to search up on Google. My question is: is there a way to auto-redirect a url to another url. For example: I type http://localhost:8080 which directs you to http://localhost:8080/ I was wondering if I could make it so http://localhost:8080 redirect to http://localhost:8080/home

Answer 1

Use the following status HttpStatus.PERMANENT_REDIRECT to indicate that this URL( / ) is permanently moved and use Location header to indicate what is the new location( /home ).

public class GreetingController {
    @GetMapping("/")
    public ResponseEntity<Map<String, String>> sayHello1() {
        return ResponseEntity.status(HttpStatus.PERMANENT_REDIRECT)
         .header("Location", "/home").build();
    }

    @GetMapping("/home")
    public ResponseEntity<Map<String, String>> sayHello() {
        return ResponseEntity.ok()
         .body(Collections.singletonMap("message", "Hello world!"));
    }    
}

Hope this will solve your problem.

Answer 2

this is works for me.

@RestController
@RequestMapping("")
public class TestController {

    @GetMapping(value = "")
    public ModelAndView redirect(HttpServletRequest request) {
        String redirectUrl = request.getRequestURL().toString() + "home";
        return new ModelAndView("redirect:" + redirectUrl);
    }
}

Answer 3

public class TestController {
  @GetMapping(value = "/")
  public String home() {
     return "redirect:/home";
  }
}

You should not put @ResponseBody annotation in method definition else the redirect will not work.