Java.lang.ClassCastException: класс java.util.LinkedHashMap не может быть приведен к классу com.example.demo.User в коне ⇐ JAVA

[Anonymous]

Я пытаюсь реализовать конечную точку для удаления пользователя, и когда я пытаюсь протестировать службу через почтальона, возникает следующая ошибка.

Код: Выделить всё

{
"timestamp": "2024-10-23T23:06:50.170+00:00",
"status": 500,
"error": "Internal Server Error",
"trace": "java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class com.example.demo.User (java.util.LinkedHashMap is in module java.base of loader 'bootstrap';  c o m . e x a m p l e . d e m o . U s e r   i s   i n   u n n a m e d   m o d u l e   o f   l o a d e r   o r g . s p r i n g f r a m e w o r k . b o o t . d e v t o o l s . r e s t a r t . c l a s s l o a d e r . R e s t a r t C l a s s L o a d e r   @ 1 3 e 9 2 a 0 5 ) \ r \ n \ t a t   j a v a . b a s e / j a v a . u t i l . A r r a y L i s t . r e m o v e I f ( A r r a y L i s t.java:1755)\r\n\tat java.base/java.util.ArrayList.removeIf(ArrayList.java:1743)\r\n\tat com.example.demo.UserService.deleteUser(UserService.java:71)\r\n\tat com.example.demo.UserController.deleteUser(UserController.java:40)\r\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\r\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:255)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:188)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:926)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:831)\r\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doDelete(FrameworkServlet.java:936)\r\n\tat jakarta.servlet.http.HttpServlet.service(HttpServlet.java:596)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)\r\n\tat jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)\r\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)\r\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)\r\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:384)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:905)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741)\r\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)\r\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190)\r\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)\r\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)\r\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\r\n",
"message":  "class java.util.LinkedHashMap cannot be cast to class com.example.demo.User (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; com.example.demo.User is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader @13e92a05)",
"path": "/api/users/11"
}

Мой код выглядит так.
UserController.java

Код: Выделить всё

    @DeleteMapping("/{id}")
public void deleteUser(@PathVariable int id) throws IOException {
userService.deleteUser(id);
}

UserService.java

Код: Выделить всё

public void deleteUser(int userId) throws IOException {
List users = getUsers();
users.removeIf(user -> user.getUserId() == userId);
saveUsers(users);
}

Может кто-нибудь указать, чего мне не хватает?

Подробнее здесь: https://stackoverflow.com/questions/791 ... cast-to-cl