请求方式'POST'不支持]
Request method 'POST' not supported]
我的 updatePowerPlant() 方法有问题，当我尝试更新具有给定 ID 的 powerPlant 实体并单击 localhost:8080/updatePowerPlant 地址下更新表单中的提交按钮时，我被重定向到此 url http://localhost:8080/updatePowerPlant/savePowerPlant.
我不知道为什么。我应该重定向到 /powerPlants，无论具有给定 ID 的实体是否存在，而是将 /savePowerPlant 添加为 url localhost:8080/updatePowerPlant 的最后一部分，我得到 Request 方法 'POST'不支持]，我知道这是我应该得到的消息，毕竟没有这样的 url 的 GetController 但为什么我得到这个奇怪的 url？是不是因为我用GetController来更新？
localhost:8080/updatePowerPlant 我在浏览器中输入这个来获取更新表单
http://localhost:8080/updatePowerPlant/savePowerPlant 这是我在更新表单中点击提交时得到的
控制器class
@RequiredArgsConstructor
@Controller
public class PowerPlantsController {
private final PowerPlantRepository powerPlantRepository;
private final EventRepository eventRepository;
private final PlantService plantService;
private final EventService eventService;
@GetMapping("form")
public String getForm(Model model) {
model.addAttribute("plant", new PlantViewModel());
return "save";
}
@PostMapping("savePowerPlant")
public String addPowerPlant(@ModelAttribute("plant") @Valid PlantViewModel plant, BindingResult bindingResult) {
if (bindingResult.hasErrors()) {
if (plant.getId() == null) {
return "save";
} else return "updatePowerPlant";
}
if (plant.getId() == null){
plantService.add(plant);
}else {
plantService.update(plant);
}
return "redirect:/powerPlants";
}
@GetMapping("updatePowerPlant/{id}")
public String updatePowerPlant(@PathVariable(value = "id") Integer id, Model model) {
var find = powerPlantRepository.getOne(id);
var plants = plantService.powerPlantToViewModel(find);
model.addAttribute("plant", plants);
return "updatePowerPlant";
}
@ResponseBody
@GetMapping("failures/{id}")
public long failures(@PathVariable("id") int id) {
return eventService.NumberOfFailureEventsForId(id);
}
@ResponseBody
@GetMapping("powerPlants")
public List<PowerPlant> findAll() {
return powerPlantRepository.findAll();
}
@GetMapping("powerPlants/{id}")
public String findById(@PathVariable("id") Integer id, Model model) {
model.addAttribute("plant", powerPlantRepository.getOne(id));
return "plant";
}
@GetMapping("delete/powerPlants")
public String deleteById(@RequestParam(value = "id") Integer id) {
powerPlantRepository.deleteById(id);
return "redirect:/powerPlants";
}
@GetMapping("addEventToPlant")
public String addEventToPlant(@RequestParam(value = "plantId") Long plantId, @RequestParam(value = "eventId")
Long eventId, Model model) {
if (powerPlantRepository.findById(Math.toIntExact(plantId)).isPresent()
&& eventRepository.findById(Math.toIntExact(eventId)).isPresent()) {
var pl = powerPlantRepository.getOne(Math.toIntExact(plantId));
var ev = eventRepository.getOne(Math.toIntExact(eventId));
var eventsForPlant = pl.getEvents();
eventsForPlant.add(ev);
pl.setEvents(eventsForPlant);
powerPlantRepository.save(pl);
}
var t = powerPlantRepository.getOne(Math.toIntExact(plantId)).getEvents();
model.addAttribute("plant", t);
return "plant_events";
}
}
服务class
@org.springframework.stereotype.Service
@RequiredArgsConstructor
public class PlantService implements powerForPowerPlantPerDay, Add, PlantServiceToViewModel {
private final EventRepository eventRepository;
private final PowerPlantRepository powerPlantRepository;
public Map<Integer, String> powerForPowerPlantPerDay(Timestamp date) {
List<Event> list = new ArrayList<>(getAllEvents());
Map<Integer, String> map = new HashMap<>();
list.stream()
.filter(e -> e.startDate.equals(date))
.forEach(e -> map.put(e.id, e.typeOfEvent));
return map;
}
public Collection<Event> getAllEvents() {
return eventRepository.findAll();
}
public void add(PlantViewModel plantViewModel) {
var p = PowerPlant.builder().
name(plantViewModel.getName())
.power(plantViewModel.getPower())
.events(plantViewModel.getListOfEventsForPlant())
.build();
powerPlantRepository.save(p);
}
public PlantViewModel powerPlantToViewModel(PowerPlant powerPlant) {
return PlantViewModel.builder()
.id(powerPlant.getId())
.name(powerPlant.getName())
.power(powerPlant.getPower())
.build();
}
public PowerPlant update(PlantViewModel plantViewModel) {
var plant = powerPlantRepository.getOne(plantViewModel.getId());
plant.setName(plantViewModel.getName());
plant.setPower(plantViewModel.getPower());
return powerPlantRepository.save(plant);
}
}
更新html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<h1>Update</h1>
<hr>
<h2>Update powerPlant</h2>
<form action="#" th:action="@{savePowerPlant}" th:object="${plant}" method="POST">
<input id="studentId" th:value="${plant.id}" type="hidden" th:field="*{id}">
<div th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Invalid Name</div>
<input type="text" th:field="*{name}" placeholder="Name" class="form-control mb-4 col-4">
<div th:if="${#fields.hasErrors('power')}" th:errors="*{power}">Invalid power</div>
<input type="text" th:field="*{power}" placeholder="power" class="form-control mb-4 col-4">
<button type="submit" class="btn btn-info col-2">Save</button>
</form>
<hr>
</div>
</body>
</html>
保存html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<title>New Student</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<h1>Save</h1>
<hr>
<h2>Save powerPlant</h2>
<form action="#" th:action="@{savePowerPlant}" th:object="${plant}" method="POST">
<div th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Invalid Name</div>
<input type="text" th:field="*{name}" placeholder="Name" class="form-control mb-4 col-4">
<div th:if="${#fields.hasErrors('power')}" th:errors="*{power}">Invalid power</div>
<input type="text" th:field="*{power}" placeholder="power" class="form-control mb-4 col-4">
<button type="submit" class="btn btn-info col-2">Save</button>
</form>
<hr>
</div>
</body>
</html>
正如您在文档中看到的 here，您在 th:action 中使用了相对 URL。这些会附加到地址栏中的当前 URL。
所以 th:action="@{savePowerPlant}" 结果是 current/URL/savePowerPlant。
简单的解决方案是通过完全输入 (http://localhost:portNumber/savePowerPlant) 或使用相对服务器 URL: th:href="@{~/savePowerPlant} 来切换到绝对 URLs。
我的 updatePowerPlant() 方法有问题，当我尝试更新具有给定 ID 的 powerPlant 实体并单击 localhost:8080/updatePowerPlant 地址下更新表单中的提交按钮时，我被重定向到此 url http://localhost:8080/updatePowerPlant/savePowerPlant.
我不知道为什么。我应该重定向到 /powerPlants，无论具有给定 ID 的实体是否存在，而是将 /savePowerPlant 添加为 url localhost:8080/updatePowerPlant 的最后一部分，我得到 Request 方法 'POST'不支持]，我知道这是我应该得到的消息，毕竟没有这样的 url 的 GetController 但为什么我得到这个奇怪的 url？是不是因为我用GetController来更新？
localhost:8080/updatePowerPlant 我在浏览器中输入这个来获取更新表单 http://localhost:8080/updatePowerPlant/savePowerPlant 这是我在更新表单中点击提交时得到的
控制器class
@RequiredArgsConstructor
@Controller
public class PowerPlantsController {
private final PowerPlantRepository powerPlantRepository;
private final EventRepository eventRepository;
private final PlantService plantService;
private final EventService eventService;
@GetMapping("form")
public String getForm(Model model) {
model.addAttribute("plant", new PlantViewModel());
return "save";
}
@PostMapping("savePowerPlant")
public String addPowerPlant(@ModelAttribute("plant") @Valid PlantViewModel plant, BindingResult bindingResult) {
if (bindingResult.hasErrors()) {
if (plant.getId() == null) {
return "save";
} else return "updatePowerPlant";
}
if (plant.getId() == null){
plantService.add(plant);
}else {
plantService.update(plant);
}
return "redirect:/powerPlants";
}
@GetMapping("updatePowerPlant/{id}")
public String updatePowerPlant(@PathVariable(value = "id") Integer id, Model model) {
var find = powerPlantRepository.getOne(id);
var plants = plantService.powerPlantToViewModel(find);
model.addAttribute("plant", plants);
return "updatePowerPlant";
}
@ResponseBody
@GetMapping("failures/{id}")
public long failures(@PathVariable("id") int id) {
return eventService.NumberOfFailureEventsForId(id);
}
@ResponseBody
@GetMapping("powerPlants")
public List<PowerPlant> findAll() {
return powerPlantRepository.findAll();
}
@GetMapping("powerPlants/{id}")
public String findById(@PathVariable("id") Integer id, Model model) {
model.addAttribute("plant", powerPlantRepository.getOne(id));
return "plant";
}
@GetMapping("delete/powerPlants")
public String deleteById(@RequestParam(value = "id") Integer id) {
powerPlantRepository.deleteById(id);
return "redirect:/powerPlants";
}
@GetMapping("addEventToPlant")
public String addEventToPlant(@RequestParam(value = "plantId") Long plantId, @RequestParam(value = "eventId")
Long eventId, Model model) {
if (powerPlantRepository.findById(Math.toIntExact(plantId)).isPresent()
&& eventRepository.findById(Math.toIntExact(eventId)).isPresent()) {
var pl = powerPlantRepository.getOne(Math.toIntExact(plantId));
var ev = eventRepository.getOne(Math.toIntExact(eventId));
var eventsForPlant = pl.getEvents();
eventsForPlant.add(ev);
pl.setEvents(eventsForPlant);
powerPlantRepository.save(pl);
}
var t = powerPlantRepository.getOne(Math.toIntExact(plantId)).getEvents();
model.addAttribute("plant", t);
return "plant_events";
}
}
服务class
@org.springframework.stereotype.Service
@RequiredArgsConstructor
public class PlantService implements powerForPowerPlantPerDay, Add, PlantServiceToViewModel {
private final EventRepository eventRepository;
private final PowerPlantRepository powerPlantRepository;
public Map<Integer, String> powerForPowerPlantPerDay(Timestamp date) {
List<Event> list = new ArrayList<>(getAllEvents());
Map<Integer, String> map = new HashMap<>();
list.stream()
.filter(e -> e.startDate.equals(date))
.forEach(e -> map.put(e.id, e.typeOfEvent));
return map;
}
public Collection<Event> getAllEvents() {
return eventRepository.findAll();
}
public void add(PlantViewModel plantViewModel) {
var p = PowerPlant.builder().
name(plantViewModel.getName())
.power(plantViewModel.getPower())
.events(plantViewModel.getListOfEventsForPlant())
.build();
powerPlantRepository.save(p);
}
public PlantViewModel powerPlantToViewModel(PowerPlant powerPlant) {
return PlantViewModel.builder()
.id(powerPlant.getId())
.name(powerPlant.getName())
.power(powerPlant.getPower())
.build();
}
public PowerPlant update(PlantViewModel plantViewModel) {
var plant = powerPlantRepository.getOne(plantViewModel.getId());
plant.setName(plantViewModel.getName());
plant.setPower(plantViewModel.getPower());
return powerPlantRepository.save(plant);
}
}
更新html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<h1>Update</h1>
<hr>
<h2>Update powerPlant</h2>
<form action="#" th:action="@{savePowerPlant}" th:object="${plant}" method="POST">
<input id="studentId" th:value="${plant.id}" type="hidden" th:field="*{id}">
<div th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Invalid Name</div>
<input type="text" th:field="*{name}" placeholder="Name" class="form-control mb-4 col-4">
<div th:if="${#fields.hasErrors('power')}" th:errors="*{power}">Invalid power</div>
<input type="text" th:field="*{power}" placeholder="power" class="form-control mb-4 col-4">
<button type="submit" class="btn btn-info col-2">Save</button>
</form>
<hr>
</div>
</body>
</html>
保存html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<title>New Student</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<h1>Save</h1>
<hr>
<h2>Save powerPlant</h2>
<form action="#" th:action="@{savePowerPlant}" th:object="${plant}" method="POST">
<div th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Invalid Name</div>
<input type="text" th:field="*{name}" placeholder="Name" class="form-control mb-4 col-4">
<div th:if="${#fields.hasErrors('power')}" th:errors="*{power}">Invalid power</div>
<input type="text" th:field="*{power}" placeholder="power" class="form-control mb-4 col-4">
<button type="submit" class="btn btn-info col-2">Save</button>
</form>
<hr>
</div>
</body>
</html>
正如您在文档中看到的 here，您在 th:action 中使用了相对 URL。这些会附加到地址栏中的当前 URL。
所以 th:action="@{savePowerPlant}" 结果是 current/URL/savePowerPlant。
简单的解决方案是通过完全输入 (http://localhost:portNumber/savePowerPlant) 或使用相对服务器 URL: th:href="@{~/savePowerPlant} 来切换到绝对 URLs。