java.sql.SQLException：字段'；客户id'；不'；没有默认值_Java_Mysql_Json_Spring_Spring Boot

java.sql.SQLException：字段'；客户id'；不'；没有默认值

java mysql json spring spring-boot

java.sql.SQLException：字段'；客户id'；不'；没有默认值,java,mysql,json,spring,spring-boot,Java,Mysql,Json,Spring,Spring Boot,我正在尝试使用JSON（通过邮递员）在我的数据库表（客户机、汽车和租赁）上使用POST和GET方法，其中客户id和汽车id是租赁表中的外键我不确定外键映射是否正确，因为对于客户机和Cars表来说，一切都很好这就是我在我的Rentalentitites课程中尝试的方法： @Entity @Table(name="rentals") public class Rentals { @Id @GeneratedValue(strategy=GenerationType.AUTO)

我正在尝试使用JSON（通过邮递员）在我的数据库表（客户机、汽车和租赁）上使用POST和GET方法，其中客户id和汽车id是租赁表中的外键

我不确定外键映射是否正确，因为对于客户机和Cars表来说，一切都很好

这就是我在我的Rentalentitites课程中尝试的方法：

@Entity
@Table(name="rentals")
public class Rentals {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Integer id;

    private Date rental_date;
    private String status;

    @OneToOne(cascade = CascadeType.ALL, fetch=FetchType.EAGER)
    @PrimaryKeyJoinColumn(name="client_id")
    private Clients client;

    @OneToOne(cascade = CascadeType.ALL, fetch=FetchType.EAGER)
    @PrimaryKeyJoinColumn(name="car_id")
    private Cars car;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public Clients getClient() {
        return client;
    }

    public void setClient(Clients client) {
        this.client = client;
    }

    public Cars getCar() {
        return car;
    }

    public void setCar(Cars car) {
        this.car = car;
    }

    public Date getRental_date() {
        return rental_date;
    }

    public void setRental_date(Date rental_date) {
        this.rental_date = rental_date;
    }
}

此外，这些是我为客户开设的entites课程：

@Entity @Table(name="clients") public class Clients { @Id @GeneratedValue(strategy= GenerationType.AUTO) private Integer client_id; public Integer getClient_id() { return client_id; } public void setClient_id(Integer client_id) { this.client_id = client_id; } private String name,surname,place_of_residence,id_number; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSurname() { return surname; } public void setSurname(String surname) { this.surname = surname; } public String getPlace_of_residence() { return place_of_residence; } public void setPlace_of_residence(String place_of_residence) { this.place_of_residence = place_of_residence; } public String getId_number() { return id_number; } public void setId_number(String id_number) { this.id_number = id_number; } }
和汽车：

@Entity @Table(name="cars") public class Cars { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Integer car_id; private String brand,model,licence_plate_number,production_year,price_per_day; public Integer getCar_id() { return car_id; } public void setCar_id(Integer car_id) { this.car_id = car_id; } public String getBrand() { return brand; } public void setBrand(String brand) { this.brand = brand; } public String getModel() { return model; } public void setModel(String model) { this.model = model; } public String getLicence_plate_number() { return licence_plate_number; } public void setLicence_plate_number(String licence_plate_number) { this.licence_plate_number = licence_plate_number; } public String getProduction_year() { return production_year; } public void setProduction_year(String production_year) { this.production_year = production_year; } public String getPrice_per_day() { return price_per_day; } public void setPrice_per_day(String price_per_day) { this.price_per_day = price_per_day; } }

2017-06-14 11:02:57.893 WARN 3932 --- [nio-8080-exec-8] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 1048, SQLState: 23000 2017-06-14 11:02:57.894 ERROR 3932 --- [nio-8080-exec-8] o.h.engine.jdbc.spi.SqlExceptionHelper : Column 'car_id' cannot be null 2017-06-14 11:02:57.898 ERROR 3932 --- [nio-8080-exec-8] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement] with root cause com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'car_id' cannot be null at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_73] at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_73] at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.Util.getInstance(Util.java:408) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2490) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2079) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2013) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5104) ~[mysql-connector-java-5.1.42.jar:5.1.42] at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1998) ~[mysql-connector-java-5.1.42.jar:5.1.42] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73] at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-8.5.15.jar:na] at com.sun.proxy.$Proxy97.executeUpdate(Unknown Source) ~[na:na] at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2855) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3426) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:619) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:273) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:254) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:299) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:775) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:748) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:753) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1146) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73] at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE] at com.sun.proxy.$Proxy81.persist(Unknown Source) ~[na:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73] at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE] at com.sun.proxy.$Proxy81.persist(Unknown Source) ~[na:na] at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:508) ~[spring-data-jpa-1.11.4.RELEASE.jar:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:504) ~[spring-data-commons-1.13.4.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:489) ~[spring-data-commons-1.13.4.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:461) ~[spring-data-commons-1.13.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:56) ~[spring-data-commons-1.13.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133) ~[spring-data-jpa-1.11.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:57) ~[spring-data-commons-1.13.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE] at com.sun.proxy.$Proxy88.save(Unknown Source) ~[na:na] at eu.fitk.controllers.RentalsController.addRental(RentalsController.java:28) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_73] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_73] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
这是我正在使用的JSON查询：

{ "client_id":2, "car_id":4, "rental_date":"2017-06-05", "status":"rented" }
另外，这是我的RentalController课程：

@RestController @RequestMapping("/rentals") public class RentalsController { private final RentalsRepository rentalsRepository; public RentalsController(RentalsRepository rentalsRepository){ this.rentalsRepository = rentalsRepository; } @RequestMapping(method = RequestMethod.POST) public void addRental(@RequestBody Rentals rental){ rentalsRepository.save(rental); } @RequestMapping(method = RequestMethod.GET) public List<Rentals> getRentals(){ return rentalsRepository.findAll(); } }
编辑1：根据@Dazak和@Wolf的建议，我将想要加入的列名称（即Rentals表中的外键）更改为client_id和car_id
此外，我尝试将PrimaryKeyJoinColumn注释更改为JoinColumn注释，但这些都不起作用。我做错什么了吗？提前感谢您的帮助

编辑2：我还将数据库中Clients和Cars表中主键的名称更改为client_id和car_id（不确定这是否是处理问题的正确方法），但仍然没有帮助。
这是行不通的。如果您使用的是ORM模型，则无法再使用IDs。您的请求提供了客户id和汽车id：

{ "client_id":2, "car_id":4, "rental_date":"2017-06-05", "status":"rented" }
但是，Rentals对象（！）既没有名为car的属性，也没有名为client的属性。我想这些附加属性只是被忽略了。租赁对象所具有的是对持有这些ID的汽车和客户机对象（！）的引用
因此，JSON必须如下所示：

{ "client":{"client_id": 2} "car":{"car_id": 4}, "rental_date":"2017-06-05", "status":"rented" }
（我希望我的JSON是正确的。我不太熟悉JavaScript。）

顺便说一句：你的OneTONE映射似乎是错误的。除非您将每辆车只租给一位客户一次，否则它应该是多功能的。
正如我所见。。。在客户端实体中没有字段
Client_id
只是
id
，在Json中也有
date\u of_rent
，但在租赁实体中，字段是
rent_date
我粘贴的Json已经过时，我更正了这一点。我会用你提到的客户id/id检查一下。不应该只有@JoinColumn而不是@PrimaryKeyJoinColumn吗？还有Dazak所说的，客户端id似乎有错误的名称好吧，我不确定我是否取消了您的权限。我将客户端类中的id名称更改为@id@GeneratedValue（strategy=GenerationType.AUTO）private Integer client_id；Cars类也是如此，但它仍然显示与以前相同的错误。将注释更改为@JoinColumn也没有帮助