具有自定义 headers 和参数的 RestTemplate GET 请求导致 400（空）
RestTemplate GET request with custom headers and parameters resulted in 400 (null)
我正在使用 Spring 为我的 REST 服务编写客户端。当我尝试使用该服务时，出现 400 响应错误。这是错误的请求，所以我的 headers 或参数一定有问题，但我无法弄清楚具体是什么。
我的 REST 控制器方法：
@RequestMapping(value = "/menu/{count}", method = RequestMethod.GET)
public String showMenu(@RequestHeader(required = false) String locale, @RequestParam boolean includeVegan,
@RequestParam boolean includeMeat, @RequestParam boolean includeGlutenFree,
@PathVariable(value = "count") int count) {
List<Meal> filteredMeals = new ArrayList<>();
if (count == 0) count = menuService.getMeals().size();
// Tworzenie przefiltrowanego menu.
for (Meal meal : menuService.getMeals()) {
if (count <= 0) break;
if (meal.isVegan() && includeVegan) filteredMeals.add(meal);
if (!meal.isVegan() && includeMeat) filteredMeals.add(meal);
if (meal.isGlutenFree() && includeGlutenFree) filteredMeals.add(meal);
count--;
}
// Tworzenie nazw pozycji posiłków w wybranym języku.
List<String> menu = new ArrayList<>();
for (Meal meal : filteredMeals) {
if (locale == null) {
// BOTH LANGUAGES
menu.add(meal.toString(true));
menu.add(meal.toString(false));
} else if (locale.equals("pl-PL")) {
// POLISH LANG
menu.add(meal.toString(true));
} else if (locale.equals("en-US")) {
// ENGLISH LANG
menu.add(meal.toString(false));
}
}
return menu.toString();
}
客户端获取方法：
private void fetchMenu() {
String locale = languageComboBox.getSelectedItem().toString();
boolean includeVegan = includeVeganCheckBox.isSelected();
boolean includeMeat = includeMeatCheckBox.isSelected();
boolean includeGlutenFree = includeGlutenFreeCheckBox.isSelected();
int limit = (int) limitSpinner.getValue();
System.out.println("DEBUG: locale: " + locale + ", vegan " + includeVegan + ", meat: " + includeMeat +
", glutenFree: " + includeGlutenFree + ", limit: " + limit);
HttpHeaders headers = new HttpHeaders();
headers.add("locale", locale);
HttpEntity entity = new HttpEntity(headers);
Map<String, Object> parameters = new HashMap<>();
parameters.put("includeVegan", includeVegan);
parameters.put("includeMeat", includeMeat);
parameters.put("includeGlutenFree", includeGlutenFree);
RestTemplate template = new RestTemplate();
ResponseEntity<String> response = template.exchange(
"http://localhost:8080/menu/" + limit,
HttpMethod.GET,
entity,
String.class,
parameters
);
menu.setText(response.getBody());
}
调用时控制台fetchMenu()
DEBUG: locale: pl-PL, vegan false, meat: true, glutenFree: false, limit: 0
16:57:37.082 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - Created GET request for "http://localhost:8080/menu/0"
16:57:37.082 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - Setting request Accept header to [text/plain, application/json, application/*+json, */*]
16:57:37.097 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - GET request for "http://localhost:8080/menu/0" resulted in 400 (null); invoking error handler
Exception in thread "AWT-EventQueue-0" org.springframework.web.client.HttpClientErrorException: 400 null
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:78)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:700)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:653)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:621)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:540)
at ait.lab3.SwingClient.fetchMenu(SwingClient.java:101)
at ait.lab3.SwingClient.access[=13=]0(SwingClient.java:16)
at ait.lab3.SwingClient.actionPerformed(SwingClient.java:65)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:308)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.awt.EventQueue.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
如您所见，服务方法响应是字符串。这是我的大学类，所以我需要使用@RequestHeader 和@PathVariable。我认为我的 headers/parameters 或路径变量 count 可能有问题，在 fetchMenu() 方法中表示为 limit.
我不知道我的代码可能有什么问题。请开发者帮忙 ;)
请在 fetchMenu() 方法中进行以下更改。
ResponseEntity 响应 = template.exchange(
"http://localhost:8080/menu/" + limit +"?includeVegan={includeVegan}&includeMeat={includeMeat}&includeGlutenFree={includeGlutenFree}",
HttpMethod.GET,
实体，
String.class,
参数
);
我正在使用 Spring 为我的 REST 服务编写客户端。当我尝试使用该服务时，出现 400 响应错误。这是错误的请求，所以我的 headers 或参数一定有问题，但我无法弄清楚具体是什么。
我的 REST 控制器方法：
@RequestMapping(value = "/menu/{count}", method = RequestMethod.GET)
public String showMenu(@RequestHeader(required = false) String locale, @RequestParam boolean includeVegan,
@RequestParam boolean includeMeat, @RequestParam boolean includeGlutenFree,
@PathVariable(value = "count") int count) {
List<Meal> filteredMeals = new ArrayList<>();
if (count == 0) count = menuService.getMeals().size();
// Tworzenie przefiltrowanego menu.
for (Meal meal : menuService.getMeals()) {
if (count <= 0) break;
if (meal.isVegan() && includeVegan) filteredMeals.add(meal);
if (!meal.isVegan() && includeMeat) filteredMeals.add(meal);
if (meal.isGlutenFree() && includeGlutenFree) filteredMeals.add(meal);
count--;
}
// Tworzenie nazw pozycji posiłków w wybranym języku.
List<String> menu = new ArrayList<>();
for (Meal meal : filteredMeals) {
if (locale == null) {
// BOTH LANGUAGES
menu.add(meal.toString(true));
menu.add(meal.toString(false));
} else if (locale.equals("pl-PL")) {
// POLISH LANG
menu.add(meal.toString(true));
} else if (locale.equals("en-US")) {
// ENGLISH LANG
menu.add(meal.toString(false));
}
}
return menu.toString();
}
客户端获取方法：
private void fetchMenu() {
String locale = languageComboBox.getSelectedItem().toString();
boolean includeVegan = includeVeganCheckBox.isSelected();
boolean includeMeat = includeMeatCheckBox.isSelected();
boolean includeGlutenFree = includeGlutenFreeCheckBox.isSelected();
int limit = (int) limitSpinner.getValue();
System.out.println("DEBUG: locale: " + locale + ", vegan " + includeVegan + ", meat: " + includeMeat +
", glutenFree: " + includeGlutenFree + ", limit: " + limit);
HttpHeaders headers = new HttpHeaders();
headers.add("locale", locale);
HttpEntity entity = new HttpEntity(headers);
Map<String, Object> parameters = new HashMap<>();
parameters.put("includeVegan", includeVegan);
parameters.put("includeMeat", includeMeat);
parameters.put("includeGlutenFree", includeGlutenFree);
RestTemplate template = new RestTemplate();
ResponseEntity<String> response = template.exchange(
"http://localhost:8080/menu/" + limit,
HttpMethod.GET,
entity,
String.class,
parameters
);
menu.setText(response.getBody());
}
调用时控制台fetchMenu()
DEBUG: locale: pl-PL, vegan false, meat: true, glutenFree: false, limit: 0
16:57:37.082 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - Created GET request for "http://localhost:8080/menu/0"
16:57:37.082 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - Setting request Accept header to [text/plain, application/json, application/*+json, */*]
16:57:37.097 [AWT-EventQueue-0] DEBUG org.springframework.web.client.RestTemplate - GET request for "http://localhost:8080/menu/0" resulted in 400 (null); invoking error handler
Exception in thread "AWT-EventQueue-0" org.springframework.web.client.HttpClientErrorException: 400 null
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:78)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:700)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:653)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:621)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:540)
at ait.lab3.SwingClient.fetchMenu(SwingClient.java:101)
at ait.lab3.SwingClient.access[=13=]0(SwingClient.java:16)
at ait.lab3.SwingClient.actionPerformed(SwingClient.java:65)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:308)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.awt.EventQueue.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
如您所见，服务方法响应是字符串。这是我的大学类，所以我需要使用@RequestHeader 和@PathVariable。我认为我的 headers/parameters 或路径变量 count 可能有问题，在 fetchMenu() 方法中表示为 limit.
我不知道我的代码可能有什么问题。请开发者帮忙 ;)
请在 fetchMenu() 方法中进行以下更改。
ResponseEntity 响应 = template.exchange( "http://localhost:8080/menu/" + limit +"?includeVegan={includeVegan}&includeMeat={includeMeat}&includeGlutenFree={includeGlutenFree}", HttpMethod.GET, 实体， String.class, 参数 );