我想连接到一个mysql数据库与休眠xml映射，但我得到这个错误

这是我的输出它显示我无法从org.hibernate.persister.entity.SingleTableEntityPersister获得构造函数。据我所知，它已设法访问登录到数据库。之后不久就会发生错误。我想连接到一个mysql数据库与休眠xml映射，但我得到这个错误

  Jan 21, 2016 9:19:44 PM org.hibernate.Version logVersion 
      INFO: HHH000412: Hibernate Core {5.0.6.Final} 
      Jan 21, 2016 9:19:44 PM org.hibernate.cfg.Environment <clinit> 
      INFO: HHH000206: hibernate.properties not found 
      Jan 21, 2016 9:19:44 PM org.hibernate.cfg.Environment   buildBytecodeProvider 
INFO: HHH000021: Bytecode provider name : javassist 
Jan 21, 2016 9:19:45 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> 
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final} 
Jan 21, 2016 9:19:45 PM org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity 
WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead. Support for obsolete DTD/XSD namespaces may be removed at any time. 
Jan 21, 2016 9:19:47 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!) 
Jan 21, 2016 9:19:47 PM `enter code here`org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/rhs] 
Jan 21, 2016 9:19:47 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001001: Connection properties: {user=root, password=****} 
Jan 21, 2016 9:19:47 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001003: Autocommit mode: false 
Jan 21, 2016 9:19:47 PM org.hibernate.engine.jdbc.connections.internal.PooledConnections <init> 
INFO: HHH000115: Hibernate connection pool size: 20 (min=1) 
Jan 21, 2016 9:19:48 PM org.hibernate.dialect.Dialect <init> 
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect 
Exception in thread "main" org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister 
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:123) 
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77) 
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:346) 
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724) 
    at JavaUtil.main(JavaUtil.java:20) 
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] 
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:91) 
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:116) 
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:388) 
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:509) 
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:124) 
    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.createEntityPersister(PersisterFactoryImpl.java:96) 
    ... 6 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:88) 
    ... 15 more 
Caused by: org.hibernate.PropertyNotFoundException: Could not locate setter method for property [Profession#SALARY] 
    at org.hibernate.internal.util.ReflectHelper.findSetterMethod(ReflectHelper.java:532) 
    at org.hibernate.property.access.internal.PropertyAccessBasicImpl.<init>(PropertyAccessBasicImpl.java:44) 
    at org.hibernate.property.access.internal.PropertyAccessStrategyBasicImpl.buildPropertyAccess(PropertyAccessStrategyBasicImpl.java:27) 
    at org.hibernate.mapping.Property.getGetter(Property.java:299) 
    at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:270) 
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:145) 
    at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:63) 
    ... 20 more

这是一个简单的POJO类

import javax.persistence.*; 

public class Profession { 
    private int EDUCATION; 
    private int HOURS; 
    private String JOB_OUTLOOK; 
    private String JOBTITLE; 
    private double SALARY; 
    private String UPWARD_MOBILITY; 

    public Profession() { 
    } 

    public int getEDUCATION() { 
     return EDUCATION; 
    } 

    public void setEDUCATION(int eDUCATION) { 
     EDUCATION = eDUCATION; 
    } 

    public int getHOURS() { 
     return HOURS; 
    } 

    public void setHOURS(int hOURS) { 
     HOURS = hOURS; 
    } 

    public String getJOB_OUTLOOK() { 
     return JOB_OUTLOOK; 
    } 

    public void setJOB_OUTLOOK(String jOB_OUTLOOK) { 
     JOB_OUTLOOK = jOB_OUTLOOK; 
    } 

    public String getJOBTITLE() { 
     return JOBTITLE; 
    } 

    public void setJOBTITLE(String jOBTITLE) { 
     JOBTITLE = jOBTITLE; 
    } 

    public double getSALARY() { 
     return SALARY; 
    } 

    public void setSALRAY(double sALARY) { 
     SALARY = sALARY; 
    } 

    public String getUPWARD_MOBILITY() { 
     return UPWARD_MOBILITY; 
    } 

    public void setUPWARD_MOBILITY(String uPWARD_MOBILITY) { 
     UPWARD_MOBILITY = uPWARD_MOBILITY; 
    } 
}

这是我的主类

import org.hibernate.*; 
import org.hibernate.cfg.*; 

import java.util.Scanner; 
import java.awt.*; 
import java.awt.image.*; 
import java.io.*; 

import javax.imageio.*; 
import javax.swing.*; 

public class JavaUtil { 
    public JavaUtil() { 
    } 

    public static void main(String[] args) throws IOException { 
     Configuration cfg = new Configuration(); 
     cfg.configure("hibernate.cfg.xml"); 

     SessionFactory factory = cfg.buildSessionFactory(); 
     Session session = factory.openSession(); 
     Profession p = new Profession(); 


     // closing session 
     Transaction tx = session.beginTransaction(); 
     session.save(p); 
     System.out.println("Object saved successfully.....!!"); 

     tx.commit(); 
     session.close(); 
     factory.close(); 
    } 

}

这是我的Hibernate配置文件

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC 
     "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
     "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
<session-factory> 

<!-- Related to the connection START --> 
<property name="connection.driver_class">com.mysql.jdbc.Driver</property> 
<property name="connection.url">jdbc:mysql://localhost:3306/rhs </property> 
<property name="connection.user">root</property> 
<property name="connection.password">root</property> 
<!-- Related to the connection END --> 

<!-- Related to hibernate properties START --> 
<property name="show_sql">true </property> 
<property name="dialet">org.hibernate.dialect.MySqlDialect </property> 
<property name="hbm2ddl.auto">update </property> 
<!-- Related to hibernate properties END --> 

<!-- Related to mapping START --> 
<mapping resource="profession.hbm.xml" /> 
<!-- Related to the mapping END --> 

</session-factory> 
</hibernate-configuration>

这是XML映射

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping> 
<class name="Profession" table="profession"> 

<id name="JOBTITLE" column="JOBTITLE" > 
<generator class="assigned" /> 
</id> 

<property name="EDUCATION"/> 
<property name="HOURS"/> 
<property name="JOB_OUTLOOK"/> 
<property name="SALARY"/> 
<property name="UPWARD_MOBILITY"/> 
</class> 
</hibernate-mapping>

来源

2016-01-22 Raghu Varma Manthena

请改变你的属性名称遵循POJO规则

public class Profession { 
    private int education; 
    private int hours; 
    private String jobOutlook;  
    private String jobTitle; 
    private double salary; 
    private String upwardMobility; 

    ..... 

}

来源

2016-01-22 03:01:29

谢谢你，固定我的问题。出于好奇，你知道为什么会导致错误吗？ Eclipse没有显示任何错误 –

，因为Hibernate使用POJO标准。如果你不遵循，它不会工作 –

我想连接到一个mysql数据库与休眠xml映射，但我得到这个错误

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