Question

大家好我不熟悉Hibernate，所以我在互联网上学习了一些教程。但是这个例子给了我以下错误。

任何想法??

更新1 -
我试图修复这个错误很多次，但仍然无法做到。调试时，我发现empID方法中 addEmployee 为NULL。我认为这就是造成这个问题的原因。

2015年9月24日下午4:20:54 org.hibernate.property.access.spi.SetterMethodImpl设置错误： HHH000123：类中的IllegalArgumentException：Employee，setter方法财产：证书2015年9月24日下午4:20:54 org.hibernate.property.access.spi.SetterMethodImpl设置错误： HHH000091：预期类型：java.util.SortedMap，实际值： org.hibernate.collection.internal.PersistentMap 调用属性的setter时发生IllegalArgumentException [Employee.certificates（expected type = java.util.SortedMap）];目标 = [Employee @ 3145028a]，属性值= [{BusinessManagement = Certificate @ 18bbd9e6， ComputerScience =证书@ 54de97b9， ProjectManagement =证书@ 61bb1e36}] at org.hibernate.property.access.spi.SetterMethodImpl.set（SetterMethodImpl.java:99）在 org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues（AbstractEntityTuplizer.java:607）在 org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues（PojoEntityTuplizer.java:220）在 org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues（AbstractEntityPersister.java:4510）在 org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate（AbstractSaveEventListener.java:261）在 org.hibernate.event.internal.AbstractSaveEventListener.performSave（AbstractSaveEventListener.java:178）在 org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId（AbstractSaveEventListener.java:109）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId（DefaultSaveOrUpdateEventListener.java:192）在 org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId（DefaultSaveEventListener.java:38）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient（DefaultSaveOrUpdateEventListener.java:177）在 org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate（DefaultSaveEventListener.java:32）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate（DefaultSaveOrUpdateEventListener.java:73）在org.hibernate.internal.SessionImpl.fireSave（SessionImpl.java:678）在org.hibernate.internal.SessionImpl.save（SessionImpl.java:670）at org.hibernate.internal.SessionImpl.save（SessionImpl.java:665）at ManageEmployee.addEmployee（ManageEmployee.java:60）at ManageEmployee.main（ManageEmployee.java:26）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at com.intellij.rt.execution.application.AppMain.main（AppMain.java:134）引起：java.lang.IllegalArgumentException：参数类型不匹配 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at org.hibernate.property.access.spi.SetterMethodImpl.set（SetterMethodImpl.java:44） ... 21更多2015年9月24日下午4:20:54 org.hibernate.property.access.spi.SetterMethodImpl设置错误： HHH000123：类中的IllegalArgumentException：Employee，setter方法财产：证书2015年9月24日下午4:20:54 org.hibernate.property.access.spi.SetterMethodImpl设置错误： HHH000091：预期类型：java.util.SortedMap，实际值： org.hibernate.collection.internal.PersistentMap 调用属性的setter时发生IllegalArgumentException [Employee.certificates（expected type = java.util.SortedMap）];目标 = [Employee @ 54b00534]，属性值= [{BusinessManagement = Certificate @ 3f7e6be2， ComputerScience = Certificate @ 4dce2ff}] at org.hibernate.property.access.spi.SetterMethodImpl.set（SetterMethodImpl.java:99）在 org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues（AbstractEntityTuplizer.java:607）在 org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues（PojoEntityTuplizer.java:220）在 org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues（AbstractEntityPersister.java:4510）在 org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate（AbstractSaveEventListener.java:261）在 org.hibernate.event.internal.AbstractSaveEventListener.performSave（AbstractSaveEventListener.java:178）在 org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId（AbstractSaveEventListener.java:109）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId（DefaultSaveOrUpdateEventListener.java:192）在 org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId（DefaultSaveEventListener.java:38）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient（DefaultSaveOrUpdateEventListener.java:177）在 org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate（DefaultSaveEventListener.java:32）在 org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate（DefaultSaveOrUpdateEventListener.java:73）在org.hibernate.internal.SessionImpl.fireSave（SessionImpl.java:678）在org.hibernate.internal.SessionImpl.save（SessionImpl.java:670）at org.hibernate.internal.SessionImpl.save（SessionImpl.java:665）at ManageEmployee.addEmployee（ManageEmployee.java:60）at ManageEmployee.main（ManageEmployee.java:34）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at com.intellij.rt.execution.application.AppMain.main（AppMain.java:134）引起：java.lang.IllegalArgumentException：参数类型不匹配 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at org.hibernate.property.access.spi.SetterMethodImpl.set（SetterMethodImpl.java:44） ... 21更多2015年9月24日下午4:20:54 org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService INFO：HHH000397：使用ASTQueryTranslatorFactory 线程＆＃34; main＆＃34;中的例外情况java.lang.IllegalArgumentException：id to 加载时需要加载 org.hibernate.event.spi.LoadEvent。（LoadEvent.java:92）at org.hibernate.event.spi.LoadEvent。（LoadEvent.java:62）at org.hibernate.internal.SessionImpl $ IdentifierLoadAccessImpl.load（SessionImpl.java:2624）在org.hibernate.internal.SessionImpl.get（SessionImpl.java:955）at ManageEmployee.updateEmployee（ManageEmployee.java:106）at ManageEmployee.main（ManageEmployee.java:40）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at com.intellij.rt.execution.application.AppMain.main（AppMain.java:134）

RDBMS表

create table EMPLOYEE (
   id INT NOT NULL auto_increment,
   first_name VARCHAR(20) default NULL,
   last_name  VARCHAR(20) default NULL,
   salary     INT  default NULL,
   PRIMARY KEY (id)
);

create table CERTIFICATE (
   id INT NOT NULL auto_increment,
   certificate_type VARCHAR(40) default NULL,
   certificate_name VARCHAR(30) default NULL,
   employee_id INT default NULL,
   PRIMARY KEY (id)
);

POJO课程

import java.util.*;

public class Employee {
   private int id;
   private String firstName; 
   private String lastName;   
   private int salary;
   private SortedMap certificates;

   public Employee() {}
   public Employee(String fname, String lname, int salary) {
      this.firstName = fname;
      this.lastName = lname;
      this.salary = salary;
   }
   public int getId() {
      return id;
   }
   public void setId( int id ) {
      this.id = id;
   }
   public String getFirstName() {
      return firstName;
   }
   public void setFirstName( String first_name ) {
      this.firstName = first_name;
   }
   public String getLastName() {
      return lastName;
   }
   public void setLastName( String last_name ) {
      this.lastName = last_name;
   }
   public int getSalary() {
      return salary;
   }
   public void setSalary( int salary ) {
      this.salary = salary;
   }

   public SortedMap getCertificates() {
      return certificates;
   }
   public void setCertificates( SortedMap certificates ) {
      this.certificates = certificates;
   }
}

比较

import java.util.Comparator;

public class MyClass implements Comparator <String>{
   public int compare(String o1, String o2) {
      final int BEFORE = -1;
      final int AFTER = 1;

      /* To reverse the sorting order, multiple by -1 */
      if (o2 == null) {
         return BEFORE * -1;
      }

      Comparable thisCertificate = o1;
      Comparable thatCertificate = o2;

      if(thisCertificate == null) {
         return AFTER * 1;
      } else if(thatCertificate == null) {
         return BEFORE * -1;
      } else {
         return thisCertificate.compareTo(thatCertificate) * -1;
      }
   }
}

证书类

public class Certificate implements Comparable <String>{
   private int id;
   private String name; 

   public Certificate() {}
   public Certificate(String name) {
      this.name = name;
   }
   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 compareTo(String that){
      final int BEFORE = -1;
      final int AFTER = 1;

      if (that == null) {
         return BEFORE;
      }

      Comparable thisCertificate = this;
      Comparable thatCertificate = that;

      if(thisCertificate == null) {
         return AFTER;
      } else if(thatCertificate == null) {
         return BEFORE;
      } else {
         return thisCertificate.compareTo(thatCertificate);
      }
   }
}

Hibernate映射文件

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

<hibernate-mapping>
   <class name="Employee" table="EMPLOYEE">
      <meta attribute="class-description">
         This class contains the employee detail. 
      </meta>
      <id name="id" type="int" column="id">
         <generator class="native"/>
      </id>
      <map name="certificates" cascade="all" sort="MyClass">
         <key column="employee_id"/>
         <index column="certificate_type" type="string"/>
         <one-to-many class="Certificate"/>
      </map>
      <property name="firstName" column="first_name" type="string"/>
      <property name="lastName" column="last_name" type="string"/>
      <property name="salary" column="salary" type="int"/>
   </class>

   <class name="Certificate" table="CERTIFICATE">
      <meta attribute="class-description">
         This class contains the certificate records. 
      </meta>
      <id name="id" type="int" column="id">
         <generator class="native"/>
      </id>
      <property name="name" column="certificate_name" type="string"/>
   </class>

</hibernate-mapping>

申请类

import java.util.*;

import org.hibernate.HibernateException; 
import org.hibernate.Session; 
import org.hibernate.Transaction;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class ManageEmployee {
   private static SessionFactory factory; 
   public static void main(String[] args) {
      try{
         factory = new Configuration().configure().buildSessionFactory();
      }catch (Throwable ex) { 
         System.err.println("Failed to create sessionFactory object." + ex);
         throw new ExceptionInInitializerError(ex); 
      }
      ManageEmployee ME = new ManageEmployee();
      /* Let us have a set of certificates for the first employee  */
      TreeMap set1 = new TreeMap();
      set1.put("ComputerScience", new Certificate("MCA"));
      set1.put("BusinessManagement", new Certificate("MBA"));
      set1.put("ProjectManagement", new Certificate("PMP"));

      /* Add employee records in the database */
      Integer empID1 = ME.addEmployee("Manoj", "Kumar", 4000, set1);

      /* Another set of certificates for the second employee  */
      TreeMap set2 = new TreeMap();
      set2.put("ComputerScience", new Certificate("MCA"));
      set2.put("BusinessManagement", new Certificate("MBA"));

      /* Add another employee record in the database */
      Integer empID2 = ME.addEmployee("Dilip", "Kumar", 3000, set2);

      /* List down all the employees */
      ME.listEmployees();

      /* Update employee's salary records */
      ME.updateEmployee(empID1, 5000);

      /* Delete an employee from the database */
      ME.deleteEmployee(empID2);

      /* List down all the employees */
      ME.listEmployees();

   }

   /* Method to add an employee record in the database */
   public Integer addEmployee(String fname, String lname, 
                                      int salary, TreeMap cert){
      Session session = factory.openSession();
      Transaction tx = null;
      Integer employeeID = null;
      try{
         tx = session.beginTransaction();
         Employee employee = new Employee(fname, lname, salary);
         employee.setCertificates(cert);
         employeeID = (Integer) session.save(employee); 
         tx.commit();
      }catch (HibernateException e) {
         if (tx!=null) tx.rollback();
         e.printStackTrace(); 
      }finally {
         session.close(); 
      }
      return employeeID;
   }

   /* Method to list all the employees detail */
   public void listEmployees( ){
      Session session = factory.openSession();
      Transaction tx = null;
      try{
         tx = session.beginTransaction();
         List employees = session.createQuery("FROM Employee").list(); 
         for (Iterator iterator1 = 
                           employees.iterator(); iterator1.hasNext();){
            Employee employee = (Employee) iterator1.next(); 
            System.out.print("First Name: " + employee.getFirstName()); 
            System.out.print("  Last Name: " + employee.getLastName()); 
            System.out.println("  Salary: " + employee.getSalary());
            SortedMap<String, Certificate> map = 
                                               employee.getCertificates();
            for(Map.Entry<String,Certificate> entry : map.entrySet()){
               System.out.print("\tCertificate Type: " +  entry.getKey());
               System.out.println(",  Name: " + 
                                        (entry.getValue()).getName());
            }
         }
         tx.commit();
      }catch (HibernateException e) {
         if (tx!=null) tx.rollback();
         e.printStackTrace(); 
      }finally {
         session.close(); 
      }
   }
   /* Method to update salary for an employee */
   public void updateEmployee(Integer EmployeeID, int salary ){
      Session session = factory.openSession();
      Transaction tx = null;
      try{
         tx = session.beginTransaction();
         Employee employee = 
                    (Employee)session.get(Employee.class, EmployeeID); 
         employee.setSalary( salary );
         session.update(employee);
         tx.commit();
      }catch (HibernateException e) {
         if (tx!=null) tx.rollback();
         e.printStackTrace(); 
      }finally {
         session.close(); 
      }
   }
   /* Method to delete an employee from the records */
   public void deleteEmployee(Integer EmployeeID){
      Session session = factory.openSession();
      Transaction tx = null;
      try{
         tx = session.beginTransaction();
         Employee employee = 
                   (Employee)session.get(Employee.class, EmployeeID); 
         session.delete(employee); 
         tx.commit();
      }catch (HibernateException e) {
         if (tx!=null) tx.rollback();
         e.printStackTrace(); 
      }finally {
         session.close(); 
      }
   }
}

Answer 1

这是关于Hibernate版本的问题。您应始终确保已采用正确版本的包。

对于此示例，它应为Hibernate 3x。

hibernate排序的地图映射？错误：HHH000091

1 个答案: