Spring Boot Controller不支持请求方法'GET' [英] Request method 'GET' not supported in Spring Boot Controller

问题描述

我有以下代码

  @Controller 
 @RequestMapping（/ recipe）
 public class RecipeController {
 private IRecipeService recipeService; 
 
 @Autowired 
 public RecipeController（IRecipeService recipeService）{
 this.recipeService = recipeService; 
} 
 
 @GetMapping（/ {id} / show）
 public String showById（@PathVariable String id，Model model）{
 
 model.addAttribute（recipe，recipeService.findById（Long.valueOf（id）））; 
 
返回recipe / show; 
} 
 @GetMapping（/ {id} / update）
 public String updateRecipe（@PathVariable String id，Model model）{
 model.addAttribute（recipe， recipeService.findCommandById（Long.valueOf（ID）））; 
 
返回recipe / recipeform; 
} 
 
 @PostMapping（/）
 public String saveOrUpdate（@ModelAttribute RecipeCommand command）{
 RecipeCommand savedCommand = recipeService.saveRecipeCommand（command）; 
 
返回redirect：/ recipe /+ savedCommand.getId（）+/ show; 
}} 
  

现在我去

更新：如下面的评论所述 - 我们可以在SpringData $ b $中直接使用@PathVariable b https://stackoverflow.com/a/39871080/4853910

解决方案

我想你必须更改HTML中的FORM，以便它在提交时使用POST，而不是GET：这样做

< form method =post...>

至少截图似乎在提交HT后显示来自浏览器的提交请求ML FORM，
并且它显示它是一个GET请求（所有表单字段作为请求参数）。

所以spring是正确的：URL（ / recipe /？id = 2& description = Spicy ...）仅匹配saveAndUpdate（）的映射，对于此方法，您只注释了POST，因此：/ recipe /上的GET没有匹配在您的控制器中完全是？id = 2& description = Spicy ......。

你能在这里发布带有
<$ c $的HTML片段吗？ c>< FORM> ...< / FORM>
part？

I have the following code

@Controller
@RequestMapping("/recipe")
public class RecipeController {
private IRecipeService recipeService;

@Autowired
public RecipeController(IRecipeService recipeService) {
    this.recipeService = recipeService;
}

@GetMapping("/{id}/show")
public String showById(@PathVariable String id, Model model) {

    model.addAttribute("recipe", recipeService.findById(Long.valueOf(id)));

    return "recipe/show";
}
@GetMapping("/{id}/update")
    public String updateRecipe(@PathVariable String id, Model model) {
        model.addAttribute("recipe", recipeService.findCommandById(Long.valueOf(id)));

    return "recipe/recipeform";
}

@PostMapping("/")
public String saveOrUpdate(@ModelAttribute RecipeCommand command) {
    RecipeCommand savedCommand = recipeService.saveRecipeCommand(command);

    return "redirect:/recipe/" + savedCommand.getId() + "/show";
}}

Now when i go to http://localhost:8080/recipe/2/update and click on Submit I call the @PostMapping method which upon updating redirects me to return "redirect:/recipe/" + savedCommand.getId() + "/show";

But then i get this error on the console

Resolved exception caused by Handler execution: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported

and this on the web

There was an unexpected error (type=Method Not Allowed, status=405). Request method 'GET' not supported

When i change the @PostMapping to @RequestMapping or add additional @GetMaapping everything works

Can any one explain this or what can i do so that @PostMapping works as expected.

Possible Reason

UPDATE: as mentioned in the comments below - we can directly use @PathVariable in SpringData https://stackoverflow.com/a/39871080/4853910

解决方案

I guess you have to change the FORM in the HTML so that it uses POST on submit, not GET: Do it this way

<form method="post" ...>

At least the screenshot seems to show the submit request from the browser after submitting the HTML FORM, and it shows there that it is a GET request (with all form fields as request parameters).

So spring ist right: the URL ("/recipe/?id=2&description=Spicy...") only matches the Mapping of saveAndUpdate(), and for this method you only annotated "POST", hence: there is no matching for GET on "/recipe/?id=2&description=Spicy..." in your Controller at all.

Can you post here the HTML snippet with the <FORM>...</FORM> part?

这篇关于Spring Boot Controller不支持请求方法'GET'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！