Spring boot 4 控制器错误：CrudRepository<Fournisseur,Long> 类型中的方法 save(S) 不适用于参数 (Fournisseur)
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【中文标题】Spring boot 4 控制器错误：CrudRepository<Fournisseur,Long> 类型中的方法 save(S) 不适用于参数 (Fournisseur)【英文标题】：Spring boot 4 controller error: The method save(S) in the type CrudRepository<Fournisseur,Long> is not applicable for the arguments (Fournisseur) 【发布时间】：2021-12-13 22:15:24 【问题描述】：我是弹簧靴的新手。我正在使用 Spring Boot (4) 数据 JPA 和 mysql。 findall 方法对我来说适用于fournisseur 类，但保存方法不起作用。 这是我的课：
package net.javaguides.springboot.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name ="fournisseur")
public class Fournisseur
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long ID;
@Column(name="Name")
private String Name;
@Column(name="Address")
private String Address;
@Column(name="Phone")
private long Phone;
public Fournisseur()
public Fournisseur(String name, String address, long phone)
super();
Name = name;
Address = address;
Phone = phone;
public long getID()
return ID;
public void setID(long iD)
this.ID = iD;
public String getName()
return Name;
public void setName(String name)
this.Name = name;
public String getAddress()
return Address;
public void setAddress(String address)
this.Address = address;
public long getPhone()
return Phone;
public void setPhone(long phone)
this.Phone = phone;
这是我的存储库：
package net.javaguides.springboot.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import net.javaguides.springboot.model.Fournisseur;
@Repository
public interface FournisseurRepository extends JpaRepository<Fournisseur,Long>
这里是我的控制器：
package net.javaguides.springboot.controller;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import net.javaguides.springboot.repository.FournisseurRepository;
@CrossOrigin(origins ="http://localhost:4200",maxAge=3600)
@RestController
@RequestMapping("/api/v1/")
public class FournisseurController<Fournisseur, Fournisseurs>
@Autowired
private FournisseurRepository fournisseurRepository;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long ID;
//get all employee
@GetMapping("/fournisseurs")
public java.util.List<net .javaguides.springboot.model.Fournisseur> getAllFournisseurs()
return fournisseurRepository.findAll();
@PostMapping("/fournisseurs")
public Fournisseur createFournisseur(@RequestBody Fournisseur fournisseur)
return fournisseurRepository.save(fournisseur);
运行应用程序并使用邮递员发布数据时，它返回以下错误：
"timestamp": "2021-12-13T22:06:19.958+00:00",
"status": 500,
"error": "Internal Server Error",
"trace": "java.lang.Error: Unresolved compilation problem: \n\tThe method save(S) in the type CrudRepository<Fournisseur,Long> is not applicable for the arguments (Fournisseur)\n\r\n\tat net.javaguides.springboot.controller.FournisseurController.createFournisseur(FournisseurController.java:33)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)\r\n\tat java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\r\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:568)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)\r\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)\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:1067)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:681)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:764)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)\r\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)\r\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)\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:61)\r\n\tat java.base/java.lang.Thread.run(Thread.java:833)\r\n",
"message": "Unresolved compilation problem: \n\tThe method save(S) in the type CrudRepository<Fournisseur,Long> is not applicable for the arguments (Fournisseur)\n",
"path": "/api/v1/fournisseurs"
IDE 会返回以下内容：
23:06:03.283 [Thread-0] DEBUG org.springframework.boot.devtools.restart.classloader.RestartClassLoader - Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader@33c8d704
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
[32m :: Spring Boot :: [39m [2m (v2.6.1)[0;39m
[2m2021-12-13 23:06:03.538[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mn.j.springboot.StockApplication [0;39m [2m:[0;39m Starting StockApplication using Java 17 on DESKTOP-BNFECFD with PID 19252 (C:\STS\Stock\target\classes started by ACER in C:\STS\Stock)
[2m2021-12-13 23:06:03.538[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mn.j.springboot.StockApplication [0;39m [2m:[0;39m No active profile set, falling back to default profiles: default
[2m2021-12-13 23:06:03.573[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36m.e.DevToolsPropertyDefaultsPostProcessor[0;39m [2m:[0;39m Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
[2m2021-12-13 23:06:03.573[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36m.e.DevToolsPropertyDefaultsPostProcessor[0;39m [2m:[0;39m For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
[2m2021-12-13 23:06:03.966[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Bootstrapping Spring Data JPA repositories in DEFAULT mode.
[2m2021-12-13 23:06:04.001[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36m.s.d.r.c.RepositoryConfigurationDelegate[0;39m [2m:[0;39m Finished Spring Data repository scanning in 29 ms. Found 1 JPA repository interfaces.
[2m2021-12-13 23:06:04.374[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.s.b.w.embedded.tomcat.TomcatWebServer [0;39m [2m:[0;39m Tomcat initialized with port(s): 8080 (http)
[2m2021-12-13 23:06:04.380[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.apache.catalina.core.StandardService [0;39m [2m:[0;39m Starting service [Tomcat]
[2m2021-12-13 23:06:04.381[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36morg.apache.catalina.core.StandardEngine [0;39m [2m:[0;39m Starting Servlet engine: [Apache Tomcat/9.0.55]
[2m2021-12-13 23:06:04.433[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.a.c.c.C.[Tomcat].[localhost].[/] [0;39m [2m:[0;39m Initializing Spring embedded WebApplicationContext
[2m2021-12-13 23:06:04.433[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mw.s.c.ServletWebServerApplicationContext[0;39m [2m:[0;39m Root WebApplicationContext: initialization completed in 860 ms
[2m2021-12-13 23:06:04.528[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Starting...
[2m2021-12-13 23:06:04.628[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mcom.zaxxer.hikari.HikariDataSource [0;39m [2m:[0;39m HikariPool-1 - Start completed.
[2m2021-12-13 23:06:04.655[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.hibernate.jpa.internal.util.LogHelper [0;39m [2m:[0;39m HHH000204: Processing PersistenceUnitInfo [name: default]
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[2m2021-12-13 23:06:04.785[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.hibernate.annotations.common.Version [0;39m [2m:[0;39m HCANN000001: Hibernate Commons Annotations 5.1.2.Final
[2m2021-12-13 23:06:04.850[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36morg.hibernate.dialect.Dialect [0;39m [2m:[0;39m HHH000400: Using dialect: org.hibernate.dialect.MySQL5InnoDBDialect
[2m2021-12-13 23:06:05.150[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.h.e.t.j.p.i.JtaPlatformInitiator [0;39m [2m:[0;39m HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
[2m2021-12-13 23:06:05.156[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mj.LocalContainerEntityManagerFactoryBean[0;39m [2m:[0;39m Initialized JPA EntityManagerFactory for persistence unit 'default'
[2m2021-12-13 23:06:05.324[0;39m [33m WARN[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mJpaBaseConfiguration$JpaWebConfiguration[0;39m [2m:[0;39m spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
[2m2021-12-13 23:06:05.512[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.s.b.d.a.OptionalLiveReloadServer [0;39m [2m:[0;39m LiveReload server is running on port 35729
[2m2021-12-13 23:06:05.605[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mo.s.b.w.embedded.tomcat.TomcatWebServer [0;39m [2m:[0;39m Tomcat started on port(s): 8080 (http) with context path ''
[2m2021-12-13 23:06:05.612[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[ restartedMain][0;39m [36mn.j.springboot.StockApplication [0;39m [2m:[0;39m Started StockApplication in 2.323 seconds (JVM running for 3.142)
[2m2021-12-13 23:06:19.900[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.a.c.c.C.[Tomcat].[localhost].[/] [0;39m [2m:[0;39m Initializing Spring DispatcherServlet 'dispatcherServlet'
[2m2021-12-13 23:06:19.900[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m Initializing Servlet 'dispatcherServlet'
[2m2021-12-13 23:06:19.901[0;39m [32m INFO[0;39m [35m19252[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m Completed initialization in 1 ms
[2m2021-12-13 23:06:19.954[0;39m [31mERROR[0;39m [35m19252[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [36mo.a.c.c.C.[.[.[/].[dispatcherServlet] [0;39m [2m:[0;39m Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.Error: Unresolved compilation problem:
The method save(S) in the type CrudRepository<Fournisseur,Long> is not applicable for the arguments (Fournisseur)
] with root cause
java.lang.Error: Unresolved compilation problem:
The method save(S) in the type CrudRepository<Fournisseur,Long> is not applicable for the arguments (Fournisseur)
at net.javaguides.springboot.controller.FournisseurController.createFournisseur(FournisseurController.java:33) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.13.jar:5.3.13]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.13.jar:5.3.13]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.13.jar:5.3.13]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.55.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.13.jar:5.3.13]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.55.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.13.jar:5.3.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.13.jar:5.3.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.13.jar:5.3.13]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.13.jar:5.3.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.55.jar:9.0.55]
at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
在此示例的以下视频中，相同的代码也有效。我做了一些研究，可以创建自定义保存方法，我尝试过但总是得到相同的结果，另外不建议这样做。我的课有什么问题吗？？
【问题讨论】：
对此请求有任何帮助吗？ 【参考方案1】：我刚刚通过以下方式更改了控制器 createfournisseur：
//Create Fournisseur
@PostMapping("/fournisseurs")
public net.javaguides.springboot.model.Fournisseur createFournisseur(@RequestBody net.javaguides.springboot.model.Fournisseur fournisseur)
@SuppressWarnings("unused")
net.javaguides.springboot.model.Fournisseur updateFournisseur = fournisseurRepository.save(fournisseur);
return fournisseurRepository.save(fournisseur);
它有效：D
【讨论】：
以上是关于Spring boot 4 控制器错误：CrudRepository<Fournisseur,Long> 类型中的方法 save(S) 不适用于参数 (Fournisseur)的主要内容，如果未能解决你的问题，请参考以下文章