无法获得org.hibernate.persister.entity.SingleTableEntityPersister的构造函数 [英] Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister

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本文介绍了无法获得org.hibernate.persister.entity.SingleTableEntityPersister的构造函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我实际上是hibernate的新手，并试图设置2个类。帐户和人员。现在我所要做的就是使用注释创建一对一的双向依赖关系。以下是一些细节和代码片段：



以下是我添加到构建路径中的库，也许我错过了任何内容：



http://prntscr.com/1jbew4



帐户：

 包后端; 
 
 import java.util.Random; 
 import java.util.Collection; 
 import java.util.TreeSet; 
 import javax.persistence。*; 
 
 @Entity 
 @Table（name =Account）
 public class Account {
 
 public static Random rnd = new Random（）; 
 private int id; 
私人字符串用户名; 
私人长密码; 
私人长盐; 
私人人物; 
私人字符串角色; 
私人收藏<帐户>好友列表; 
 
公共账户（）{
 
} 
 
公共账户（字符串用户名，长密码，人员，字符串角色）{
超（）; 
 this.username = username; 
 this.password =密码; 
 this.setSalt（）; 
 this.person = person; 
 this.role =角色; 
 this.friendlist = new TreeSet< Account>（）; 
 
 $ b $ @ $ 
 @GeneratedValue 
 @Column（name =Id）
 public int getId（）{
 return id ; 
} 
 
 public void setId（int id）{
 this.id = id; 
 
 
 @Column（name =Username）
 public String getUsername（）{
 return username; 
} 
 
 public void setUsername（String username）{
 this.username = username; 
 
 $ b $ @Column（name =Password）
 public long getPassword（）{
 return password; 
 
 $ b $ public void setPassword（String password）{
 this.password =（long）salt + password.hashCode（）; 
 
 $ b $ @Column（name =Salt）
 public long getSalt（）{
 return salt; 
} 
 
 public void setSalt（）{
 this.salt = rnd.nextLong（）; 
 if（this.salt <0）{
 this.salt = this.salt *（-1）; 
 
 
 
 @OneToOne（cascade = CascadeType.ALL）
 @JoinColumn（name =Person_FK）
 public Person getPerson（）{ 
 return person; 
} 
 
 public void setPerson（Person person）{
 this.person = person; 
 
 $ b @Column（name =Role）
 public String getRole（）{
 return role; 
 
 
 public void setRole（String role）{
}

Person： 

 包后端; 
 
 import javax.persistence。*; 
 
 @Entity 
 @Table（name =Person）
 public class Person {
 
 private int id; 
 private String firstName; 
 private String lastName; 
私人字符串街道; 
 private int houseNumber; 
 private String tel; 
私人字符串电子邮件; 
私人字符串移动; 
私人帐户帐户; 
 $ b $ public Person（）{
 
} 
 
 public Person（int id，String firstName，String lastName，String street，
 int houseNumber，String tel，String email，String mobile，
账户）{
 super（）; 
 this.id = id; 
 this.firstName = firstName; 
 this.lastName = lastName; 
 this.street = street; 
 this.houseNumber = houseNumber; 
 this.tel = tel; 
 this.email =电子邮件; 
 this.mobile = mobile; 
 this.account = account; 
 
 $ b $ @ $ 
 @GeneratedValue 
 @Column（name =Id）
 public int getId（）{
 return id ; 
} 
 
 public void setId（int id）{
 this.id = id; 
 
 $ b $ @Column（name =Firstname）
 public String getFirstName（）{
 return firstName; 
} 
 
 public void setFirstName（String firstName）{
 this.firstName = firstName; 
 
 
 $ b @Column（name =Lastname）
 public String getLastName（）{
 return lastName; 
} 
 
 public void setLastName（String lastName）{
 this.lastName = lastName; 
 
 $ b $ @Column（name =Street）
 public String getStreet（）{
 return street; 
} 
 
 public void setStreet（String street）{
 this.street = street; 
 
 
 @Column（name =Housenumber）
 public int getHouseNumber（）{
 return houseNumber; 
} 
 
 public void setHouseNumber（int houseNumber）{
 this.houseNumber = houseNumber; 
 
 
 @Column（name =Tel）
 public String getTel（）{
 return tel; 
} 
 
 public void setTel（String tel）{
 this.tel = tel; 
 
 $ b $ @Column（name =Email）
 public String getEmail（）{
 return email; 
} 
 
 public void setEmail（String email）{
 this.email = email; 
 
 
 @Column（name =Mobile）
 public String getMobile（）{
 return mobile; 
} 
 
 public void setMobile（String mobile）{
 this.mobile = mobile; 
} 
 
 @OneToOne（mappedBy =person，cascade = CascadeType.ALL）
 public Account getAccount（）{
 return account; 
} 
 
 public void setAccount（Account account）{
 this.account = account;

Hibernate cfg xml： 

 <？xml version ='1.0'encoding ='utf-8'？> 
<！DOCTYPE hibernate-configuration PUBLIC 
 -  // Hibernate / Hibernate配置DTD 3.0 // EN
http://hibernate.sourceforge.net/hibernate-configuration-3.0 .dtd> 
< hibernate-configuration> 
< session-factory> 
<！ - 备选1：MySQL  - > 
 
 <！ - 数据库连接设置：MySQL  - > 
< property name =connection.driver_class> com.mysql.jdbc.Driver< / property> 
< property name =connection.url> jdbc：mysql：///chat.application.db< / property> 
< property name =connection.username> root< / property> 
< property name =connection.password>< / property> 
< property name =dialect> org.hibernate.dialect.MySQLDialect< / property> 
 
 
 <！ -  JDBC连接池（使用内置） - > 
< property name =connection.pool_size> 1< / property> 
 
 
 <！ - 启用Hibernate的自动会话上下文管理 - > 
< property name =current_session_context_class>线程< / property> 
 
 <！ - 禁用二级缓存 - > 
< property name =cache.provider_class> org.hibernate.cache.NoCacheProvider< / property> 
 
 <！ - 将所有执行的SQL回复到stdout  - > 
< property name =show_sql> true< / property> 
< property name =format_sql> true< / property> 
 
 <！ - 在启动时删除并重新创建数据库模式 - > 
< property name =hbm2ddl.auto>建立< / property> 
 
< property name =hibernate.format_sql> true< / property> 
 
<！ -  Auflistung der gemappten Klassen（Package + Class-Name） - > 
< mapping class =backend.Account/> 
< mapping class =backend.Person/> 
 
<！ - < mapping class =backend.Role/> - > 
< / session-factory> 
< / hibernate-configuration>

这是我的问题。当我尝试启动一个简单的主类来创建一些对象并保存它们时，我只是想测试一下：
$ b

（%%%%错误创建SessionFactory %%%% = printStackTrace之前的try-catch结果） 

 信息：HHH000397：使用ASTQueryTranslatorFactory 
 %%%%错误创建SessionFactory %%%% 
 org.hibernate.MappingException：无法获得org.hibernate.persister.entity.SingleTableEntityPersister $ b $的构造函数org.hibernate.persister.internal。 PersisterFactoryImpl.create（PersisterFactoryImpl.java:185）
。在org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister（PersisterFactoryImpl.java:135）LT 
。在org.hibernate.internal.SessionFactoryImpl&;初始化> （SessionFactoryImpl.java:385）
在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1769）
在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1840）
在后端.Hib ernateSessionFactory.currentSession（HibernateSessionFactory.java:21）
 at backend.HibernateSessionFactory.getCfg（HibernateSessionFactory.java:48）
 at backend.Main.main（Main.java:14）
引起：org.hibernate.HibernateException：无法在org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer实例默认的tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] 
（EntityTuplizerFactory.java:138）
在org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer（EntityTuplizerFactory.java:188）$ b $ LT b。在org.hibernate.tuple.entity.EntityMetamodel&; INIT>（EntityMetamodel.java:341）
。在。 org.hibernate.persister.entity.AbstractEntityPersister<初始化>（AbstractEntityPersister.java:507）在org.hibernate.persister.entity.SingleTableEntityPersister 
将INIT>（SingleTableEntityPersister.java:146）
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method）
 at sun.reflect.Nat iveConstructorAccessorImpl.newInstance（Unknown Source）
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（Unknown Source）
 at java.lang.reflect.Constructor.newInstance（Unknown Source）
 at org.hibernate。 persister.internal.PersisterFactoryImpl.create（PersisterFactoryImpl.java:163）
 ... 7 more 
导致：java.lang.reflect.InvocationTargetException $ b $在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本地方法）
 at sun.reflect.NativeConstructorAccessorImpl.newInstance（Unknown Source）
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（Unknown Source）
 at java.lang.reflect.Constructor.newInstance（未知来源）
在org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer（EntityTuplizerFactory.java:135）
 ... 16 more 
导致：org.hibernate.PropertyNotFoundException：无法在类后台找到属性salt的setter.Account 
在org.hibernate.pro perty.BasicPropertyAccessor.createSetter（BasicPropertyAccessor.java:252）
 at org.hibernate.property.BasicPropertyAccessor.getSetter（BasicPropertyAccessor.java:245）
 at org.hibernate.mapping.Property.getSetter（Property。的java：326）在org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertySetter（PojoEntityTuplizer.java:444 
）
。在org.hibernate.tuple.entity.AbstractEntityTuplizer< INIT>（AbstractEntityTuplizer.java。 ：201）
在org.hibernate.tuple.entity.PojoEntityTuplizer。< init>（PojoEntityTuplizer.java:82）
 ... 21 more 
线程mainjava中的异常。 lang.NullPointerException 
处的backend.Main.main backend.HibernateSessionFactory.getCfg（HibernateSessionFactory.java:48）
 backend.HibernateSessionFactory.currentSession（HibernateSessionFactory.java:28）
（主。 java：14）

所以我真的不知道如何处理这个异常。我试图谷歌它等，但我发现是有些人在他们的代码中有拼写错误，这是它的原因。但不幸的是我没有在我的代码中有拼写。有人能帮我吗？如果需要，我也很乐意发布我的SessionFactoryCode或主类。由于我是hibernate的新手，所以我会采取一切建议=）



BTW：SQL DB通过XAMPP运行。



Thanks。

解决方案

您缺少 salt



请将setter添加为

> public void setSalt（long salt）{
this.salt = salt;
}


I am actually new to hibernate and tried to set up 2 classes. Account and Person. Now all i try to do is create a one to one bidirectional dependency using annotations. Here are some details and code snippets:

Here are my libraries which i added to the build path, maybe i missed anything:

http://prntscr.com/1jbew4

Account:

package backend;

import java.util.Random;
import java.util.Collection;
import java.util.TreeSet;
import javax.persistence.*;

@Entity
@Table(name = "Account")
public class Account {

    public static Random rnd = new Random();
    private int id;
    private String username;
    private long password;
    private long salt;
    private Person person;
    private String role;
    private Collection<Account> friendlist;

    public Account() {

    }

    public Account(String username, long password, Person person, String role) {
        super();
        this.username = username;
        this.password = password;
        this.setSalt();
        this.person = person;
        this.role = role;
        this.friendlist = new TreeSet<Account>();
    }

    @Id
    @GeneratedValue
    @Column(name = "Id")
    public int getId() {
        return id;
    }

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

    @Column(name = "Username")
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    @Column(name = "Password")
    public long getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = (long) salt + password.hashCode();
    }

    @Column(name = "Salt")
    public long getSalt() {
        return salt;
    }

    public void setSalt() {
        this.salt = rnd.nextLong();
        if (this.salt < 0) {
            this.salt = this.salt * (-1);
        }
    }

    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "Person_FK")
    public Person getPerson() {
        return person;
    }

    public void setPerson(Person person) {
        this.person = person;
    }

    @Column(name = "Role")
    public String getRole() {
        return role;
    }

    public void setRole(String role) {
}

Person:

package backend;

import javax.persistence.*;

@Entity
@Table(name ="Person")
public class Person {

    private int id;
    private String firstName;
    private String lastName;
    private String street;
    private int houseNumber;
    private String tel;
    private String email;
    private String mobile;
    private Account account;

    public Person() {

    }

    public Person(int id, String firstName, String lastName, String street,
            int houseNumber, String tel, String email, String mobile,
            Account account) {
        super();
        this.id= id;
        this.firstName = firstName;
        this.lastName = lastName;
        this.street = street;
        this.houseNumber = houseNumber;
        this.tel = tel;
        this.email = email;
        this.mobile = mobile;
        this.account = account;
    }

    @Id
    @GeneratedValue
    @Column(name="Id")
    public int getId() {
        return id;
    }

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

    @Column(name="Firstname")
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }


    @Column(name="Lastname")
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Column(name="Street")
    public String getStreet() {
        return street;
    }

    public void setStreet(String street) {
        this.street = street;
    }

    @Column(name="Housenumber")
    public int getHouseNumber() {
        return houseNumber;
    }

    public void setHouseNumber(int houseNumber) {
        this.houseNumber = houseNumber;
    }

    @Column(name="Tel")
    public String getTel() {
        return tel;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    @Column(name="Email")
    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Column(name="Mobile")
    public String getMobile() {
        return mobile;
    }

    public void setMobile(String mobile) {
        this.mobile = mobile;
    }

    @OneToOne(mappedBy = "person", cascade = CascadeType.ALL)   
    public Account getAccount() {
        return account;
    }

    public void setAccount(Account account) {
        this.account = account;
    }
}

Hibernate cfg xml:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!-- Alternative 1: MySQL -->

        <!-- Database connection settings: MySQL -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql:///chat.application.db</property>
        <property name="connection.username">root</property>
        <property name="connection.password"></property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>


        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>


        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">create</property>

        <property name="hibernate.format_sql">true</property>

        <!-- Auflistung der gemappten Klassen (Package + Class-Name) -->
        <mapping class="backend.Account"/>
        <mapping class="backend.Person"/>

        <!-- <mapping class="backend.Role"/> -->
    </session-factory>
</hibernate-configuration>

And here is my problem. when i try to start a simple main class creating some objects and saving them, just to test, i get this:

( %%%% Error Creating SessionFactory %%%% = result of my try-catch before printStackTrace)

INFO: HHH000397: Using ASTQueryTranslatorFactory
%%%% Error Creating SessionFactory %%%% 
org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
    at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:385)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1769)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1840)
    at backend.HibernateSessionFactory.currentSession(HibernateSessionFactory.java:21)
    at backend.HibernateSessionFactory.getCfg(HibernateSessionFactory.java:48)
    at backend.Main.main(Main.java:14)
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:138)
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188)
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341)
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:507)
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
    ... 7 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135)
    ... 16 more
Caused by: org.hibernate.PropertyNotFoundException: Could not find a setter for property salt in class backend.Account
    at org.hibernate.property.BasicPropertyAccessor.createSetter(BasicPropertyAccessor.java:252)
    at org.hibernate.property.BasicPropertyAccessor.getSetter(BasicPropertyAccessor.java:245)
    at org.hibernate.mapping.Property.getSetter(Property.java:326)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertySetter(PojoEntityTuplizer.java:444)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:201)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82)
    ... 21 more
Exception in thread "main" java.lang.NullPointerException
    at backend.HibernateSessionFactory.currentSession(HibernateSessionFactory.java:28)
    at backend.HibernateSessionFactory.getCfg(HibernateSessionFactory.java:48)
    at backend.Main.main(Main.java:14)

So i really dont know how to handle this exception. I tried to google it and such but all i found out is that some people had spelling mistakes in their code and this was the reason for it. but unfortunately i dont have spellies in my code. Can someone help me? I will be happy to also post my SessionFactoryCode or the main class if neccessary. Due to the fact that i am new to hibernate i take every advise =)

BTW: SQL DB is running via XAMPP.

Thanks.

解决方案

You are missing setter for salt property as indicated by the exception

Please add the setter as 

 public void setSalt(long salt) {
      this.salt=salt;
 }

这篇关于无法获得org.hibernate.persister.entity.SingleTableEntityPersister的构造函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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