hibernate PropertyAccessException：使用@ManyToMany 时访问字段时出错

【问题标题】：hibernate PropertyAccessException: Error accessing field when use @ManyToManyhibernate PropertyAccessException：使用@ManyToMany 时访问字段时出错
【发布时间】：2018-09-07 07:40:56
【问题描述】：

我最近开始休眠，在我的第一个项目中，我在使用 @ManyToMany 时给出了PropertyAccessException: Error accessing field，我不知道发生了什么，我仔细检查了 getter 和 setter 是否公开，使用 MySQL 和 SQLite 并使用 hibernate v4和 v5

菜单类：

package ir.sadeghpro.breakfast;

import javax.persistence.*;
import java.util.HashMap;
import java.util.Map;

@Entity
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private String name;
    private int count;
    private int min;
    private int type;
    @ManyToMany(targetEntity = Menu.class)
    private Map<Menu,Integer> menus = new HashMap<>();

    public Product(){}

    public Product(int type) {
        this.type = type;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getMin() {
        return min;
    }

    public void setMin(int min) {
        this.min = min;
    }

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public Map<Menu, Integer> getMenus() {
        return menus;
    }

    public void setMenus(Map<Menu, Integer> menus) {
        this.menus = menus;
    }
}

产品类别：

package ir.sadeghpro.breakfast;

import javax.persistence.*;
import java.util.HashMap;
import java.util.Map;

@Entity
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private String name;
    private int count;
    private int min;
    private int type;
    @ManyToMany(targetEntity = Menu.class)
    private Map<Menu,Integer> menus = new HashMap<>();

    public Product(){}

    public Product(int type) {
        this.type = type;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getMin() {
        return min;
    }

    public void setMin(int min) {
        this.min = min;
    }

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public Map<Menu, Integer> getMenus() {
        return menus;
    }

    public void setMenus(Map<Menu, Integer> menus) {
        this.menus = menus;
    }
}

休眠配置文件：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="connection.url">jdbc:sqlite:sqlite.db</property>
        <property name="dialect">org.hibernate.dialect.SQLiteDialect</property>
        <property name="connection.driver_class">org.sqlite.JDBC</property>
        <property name="show_sql">true</property>
        <!-- <property name="connection.username"/> -->
        <!-- <property name="connection.password"/> -->

        <!-- DB schema will be updated if needed -->
        <property name="hbm2ddl.auto">create</property>
    </session-factory>
</hibernate-configuration>

休眠版本是 5.3.6.Final。错误是 

Sep 07, 2018 11:47:10 AM org.hibernate.internal.ExceptionMapperStandardImpl mapManagedFlushFailure
ERROR: HHH000346: Error during managed flush [org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private int ir.sadeghpro.breakfast.Product.id] by reflection for persistent property [ir.sadeghpro.breakfast.Product#id] : 1]
Sep 07, 2018 11:47:10 AM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release
INFO: HHH000010: On release of batch it still contained JDBC statements
Exception in Application start method
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: 
/Users/peter/IdeaProjects/breakfast/target/classes/main.fxml

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at ir.sadeghpro.breakfast.Run.start(Run.java:13)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
Caused by: javax.persistence.PersistenceException: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private int ir.sadeghpro.breakfast.Product.id] by reflection for persistent property [ir.sadeghpro.breakfast.Product#id] : 1
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188)
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1460)
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:511)
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3283)
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2479)
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:178)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:39)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:271)
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:98)
    at ir.sadeghpro.breakfast.controller.Main.initialize(Main.java:110)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
    ... 14 more
Caused by: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private int ir.sadeghpro.breakfast.Product.id] by reflection for persistent property [ir.sadeghpro.breakfast.Product#id] : 1
    at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:75)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:224)
    at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4931)
    at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:4631)
    at org.hibernate.engine.internal.ForeignKeys.isTransient(ForeignKeys.java:226)
    at org.hibernate.engine.internal.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:276)
    at org.hibernate.type.EntityType.getIdentifier(EntityType.java:495)
    at org.hibernate.type.EntityType.nullSafeSet(EntityType.java:280)
    at org.hibernate.persister.collection.AbstractCollectionPersister.writeElement(AbstractCollectionPersister.java:911)
    at org.hibernate.persister.collection.AbstractCollectionPersister.recreate(AbstractCollectionPersister.java:1334)
    at org.hibernate.action.internal.CollectionRecreateAction.execute(CollectionRecreateAction.java:50)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:478)
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:356)
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1454)
    ... 24 more
Caused by: java.lang.IllegalArgumentException: Can not set int field ir.sadeghpro.breakfast.Product.id to java.lang.Integer
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
    at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
    at sun.reflect.UnsafeIntegerFieldAccessorImpl.getInt(UnsafeIntegerFieldAccessorImpl.java:56)
    at java.lang.reflect.Field.getInt(Field.java:574)
    at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:62)
    ... 39 more
Exception running application ir.sadeghpro.breakfast.Run

【问题讨论】：

    标签： java mysql hibernate sqlite


    【解决方案1】：

    堆栈跟踪中打印的错误：

    原因：java.lang.IllegalArgumentException：无法设置 int 字段 ir.sadeghpro.breakfast.Product.id 到 java.lang.Integer

    您是否尝试过更改该字段？

    您也可以搜索similar errors 并尝试那里的建议。

    【讨论】：

    • 是的，我将 id 更改为整数，但没有任何更改，然后下一个错误是由以下原因引起的：java.lang.IllegalArgumentException：无法将 java.lang.Integer 字段 ir.sadeghpro.breakfast.Product.id 设置为 java .lang.Integer
    • 在您的 main.fxml 文件中很可能有一个错误的 HQL 查询。你检查过它/他们吗？您必须搜索 product = :youridparam 并按照链接建议修改 product.id=:youridparam
    • 我只使用 session.save() 而不是 HQL
    • 产品 product = new Product();产品.setId(1); product.setName("تخم مرغ"); product.setMin(5);产品.setCount(10);产品.setType(0);菜单 menu1 = new Menu(); menu1.setId(1); menu1.setName("سویس تخم مرغ"); menu1.setPrice(4500); menu1.getProducts().put(product,1); product.getMenus().put(menu1,1); // session.save(product); session.save(menu1); session.save(产品);
    • 你使用什么休眠版本？在某些版本中有一些bugs...
    猜你喜欢
    • 2023-04-06
    • 2020-08-12
    • 2020-03-29
    • 1970-01-01
    • 2021-06-26
    • 2023-03-15
    • 2021-08-23
    • 1970-01-01
    • 1970-01-01
    相关资源
    最近更新 更多
    热门标签
    Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode