0
我已经检查了stackoverflow中的所有相关问题，但仍无法解决问题。请帮我解决这个问题。包括以下所有必需的细节。请让我知道是否需要进一步的细节。第一次问这个问题，如果在我将编辑它的问题中出现任何错误，请帮助我。获取JpaSystemException：尝试通过使用spring启动将对象保存在mySql数据库中时，无法通过反射设置字段值[2]值
主要类
package com.example;
import java.util.concurrent.TimeUnit;
import javax.sql.DataSource;
import org.apache.catalina.connector.Connector;
import org.apache.log4j.Logger;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.boot.web.servlet.ErrorPage;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpStatus;
import org.springframework.orm.hibernate4.LocalSessionFactoryBuilder;
import com.dto.Product;
@SpringBootApplication
public class Application extends SpringBootServletInitializer{
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
private static final Logger LOGGER = Logger.getLogger(Application.class);
public static void main(String[] args) {
try{
ApplicationContext ctx = SpringApplication.run(Application.class, args);
System.out.println(ctx);
LOGGER.info("Spring Boot Beans:");
LOGGER.info("Spring boot is ready");
}catch(Exception e){
LOGGER.error(e);
}
}
@Bean
public EmbeddedServletContainerFactory tomcatEmbeddedServletContainerFactory() {
TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
@Override
public void customize(Connector connector) {
connector.setProperty("maxKeepAliveRequests", "1");
connector.setProperty("connectionTimeout", "20000");
connector.setProperty("keepAliveTimeout", "1");
connector.setProperty("maxThreads", "250");
connector.setURIEncoding("UTF-8");
}
});
// Set timeout for tomcat and custom error pages.
factory.setSessionTimeout(10, TimeUnit.MINUTES);
factory.setContextPath("/spring-boot");
factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/404.html"));
factory.addErrorPages(new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/500.html"));
return factory;
}
@Autowired
DataSource dataSource;
@Bean
public SessionFactory sessionFactory(){
return new LocalSessionFactoryBuilder(dataSource)
.addAnnotatedClass(Product.class)
.buildSessionFactory();
}
}
DAO类
package com.example;
import java.math.BigDecimal;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.jboss.logging.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.dto.Product;
@Repository
@Transactional
public class DAOClass {
private static Logger logger = Logger.getLogger(DAOClass.class);
@Autowired
SessionFactory factory ;
public void saveProduct(){
Session session = factory.openSession();
Transaction transaction = null;
transaction = session.beginTransaction();
Product product = new Product("TestProduct",new BigDecimal(111));
session.save(product);
transaction.commit();
}
}
产品实体类
package com.dto;
import java.io.Serializable;
import java.math.BigDecimal;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
@Entity
@Table(name="PRODUCT")
public class Product implements Serializable{
private static final long serialVersionUID = -1231235L;
@Id
@GenericGenerator(name="marksIdGenerator" , strategy="increment")
@GeneratedValue(generator="marksIdGenerator")
@Column(name = "PRODUCT_ID")
private Integer productId;
@Column(name = "PRODUCT_NAME")
private String productName;
@Column(name = "PRICE")
private BigDecimal price;
public Product(){}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Product [productId=" + productId + ", productName=" + productName + ", price=" + price + "]";
}
public Product(Integer productId, String productName, BigDecimal price) {
super();
this.productId = productId;
this.productName = productName;
this.price = price;
}
public Product(String productName, BigDecimal price) {
super();
this.productName = productName;
this.price = price;
}
/**
* @return the productId
*/
public int getProductId() {
return productId;
}
/**
* @param productId the productId to set
*/
public void setProductId(Integer productId) {
this.productId = productId;
}
/**
* @return the productName
*/
public String getProductName() {
return productName;
}
/**
* @param productName the productName to set
*/
public void setProductName(String productName) {
this.productName = productName;
}
/**
* @return the price
*/
public BigDecimal getPrice() {
return price;
}
/**
* @param price the price to set
*/
public void setPrice(BigDecimal price) {
this.price = price;
};
}
application.properties文件
spring.datasource.url=jdbc:mysql://localhost:3306/MyDb
spring.datasource.username=root
spring.datasource.password=677234
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.tomcat.max-active=5
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.ddl-auto =update
spring.jpa.show-sql = true
server.port=8081
的build.gradle文件
buildscript {
repositories {
//jcenter()
mavenLocal()
mavenCentral()
maven { url "http://repo.spring.io/release" }
maven { url "http://repo.spring.io/milestone" }
maven { url "http://repo.spring.io/snapshot" }
}
dependencies {
classpath('org.springframework.boot:spring-boot-gradle-plugin:1.5.1.RELEASE')
}
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'war'
repositories {
mavenLocal()
mavenCentral()
maven { url "http://repo.spring.io/release" }
maven { url "http://repo.spring.io/milestone" }
maven { url "http://repo.spring.io/snapshot" }
maven { url "https://repository.jboss.org/nexus/content/repositories/releases" }
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
dependencies {
compile("org.springframework.boot:spring-boot-starter")
compile("org.springframework.boot:spring-boot-starter-web")
compile("org.springframework.boot:spring-boot-starter-jdbc")
compile("org.springframework.boot:spring-boot-starter-jersey")
compile("org.apache.tomcat.embed:tomcat-embed-jasper")
compile("mysql:mysql-connector-java")
compile("javax.inject:javax.inject")
compile("org.springframework.boot:spring-boot")
testCompile("org.springframework.boot:spring-boot-starter-test")
compile("org.springframework.boot:spring-boot-devtools")
compile("org.springframework.boot:spring-boot-starter-data-jpa")
}
错误跟踪（它包括球衣和servlet相关的错误，因为我通过REST调用DAO打这个可以忽略不计）
2017-02-26 08:30:27.158 ERROR 1076 --- [nio-8081-exec-1] o.s.boot.web.support.ErrorPageFilter : Forwarding to error page from request [/services/health] due to exception [org.springframework.orm.jpa.JpaSystemException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId; nested exception is org.hibernate.PropertyAccessException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId]
javax.servlet.ServletException: org.springframework.orm.jpa.JpaSystemException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId; nested exception is org.hibernate.PropertyAccessException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489) ~[jersey-container-servlet-core-2.25.1.jar:na]
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) ~[jersey-container-servlet-core-2.25.1.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) ~[jersey-container-servlet-core-2.25.1.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) ~[jersey-container-servlet-core-2.25.1.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) ~[jersey-container-servlet-core-2.25.1.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:115) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:59) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:90) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:108) [spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.11.jar:8.5.11]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_45]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.11.jar:8.5.11]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
Caused by: org.springframework.orm.jpa.JpaSystemException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId; nested exception is org.hibernate.PropertyAccessException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:333) ~[spring-orm-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:241) ~[spring-orm-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:491) ~[spring-orm-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656) ~[spring-aop-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at com.example.DAOClass$$EnhancerBySpringCGLIB$$960298ca.saveProduct(<generated>) ~[bin/:na]
at com.example.HealthController.health(HealthController.java:21) ~[bin/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_45]
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:315) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:297) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:267) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) ~[jersey-common-2.25.1.jar:na]
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) ~[jersey-server-2.25.1.jar:na]
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) ~[jersey-container-servlet-core-2.25.1.jar:na]
... 48 common frames omitted
Caused by: org.hibernate.PropertyAccessException: Could not set field value [2] value by reflection : [class com.dto.Product.productId] setter of com.dto.Product.productId
at org.hibernate.property.access.spi.SetterFieldImpl.set(SetterFieldImpl.java:58) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.tuple.entity.AbstractEntityTuplizer.setIdentifier(AbstractEntityTuplizer.java:260) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.setIdentifier(AbstractEntityPersister.java:4617) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:168) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:679) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:671) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:666) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at com.example.DAOClass.saveProduct(DAOClass.java:31) ~[bin/:na]
at com.example.DAOClass$$FastClassBySpringCGLIB$$f5c2d5f7.invoke(<generated>) ~[bin/:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721) ~[spring-aop-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 78 common frames omitted
Caused by: java.lang.IllegalArgumentException: Can not set java.lang.Integer field com.dto.Product.productId to com.dto.Product
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) ~[na:1.8.0_45]
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) ~[na:1.8.0_45]
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58) ~[na:1.8.0_45]
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:75) ~[na:1.8.0_45]
at java.lang.reflect.Field.set(Field.java:764) ~[na:1.8.0_45]
at org.hibernate.property.access.spi.SetterFieldImpl.set(SetterFieldImpl.java:38) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
... 96 common frames omitted
上述错误指出org.hibernate作为.PropertyAccessException：无法通过反射设置字段值[2]值：[class com.dto.Product.productId]
不知道确切原因。
但我能够通过使用HQL获取产品表的所有细节，并且能够通过使用session.get（Product.class，productId）获得特定的产品详细信息。
虽然坚持我面临的问题的数据。一切工作正常，如果我使用Hibernate的XML映射。
面向onetomany映射的相同问题。
添加产品表描述图像
表：
创建表PRODUCT（ PRODUCT_ID INT不为空， PRODUCT_NAME VARCHAR（50）， PRICE DECIMAL（5,2） ， 主键（PRODUCE_ID） ）;
我经历了以下网站：
https://hellokoding.com/jpa-one-to-many-relationship-mapping-example-with-spring-boot-hsql/
我想会话工厂对象，并应通过它来执行所有操作。
它可能与该字段和getter/setter的int和Integer混合有关。你可以尝试将它们全部设置为原始的吗？ –
试过，还是一样的例外。 – shashikumar
您可以尝试简化您的ID字段生成： @Id @GeneratedValue（strategy = GenerationType.AUTO） private Integer productId; GenerationTYpe.Sequence也是另一种选择。不知道什么是自动/默认为mysql –