ERROR: HHH000123: IllegalArgumentException in class: com.tt.hibernate.helloworld.News, setter method of property: date

问题描述：

Hibernate连接数据库时，报出如下错误：

十一月 29, 2016 3:08:31 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000232: Schema update complete
Hibernate:
select
news0_.ID as ID1_0_0_,
news0_.TITLE as TITLE2_0_0_,
news0_.AUTHOR as AUTHOR3_0_0_,
news0_.DATE as DATE4_0_0_
from
NEWS news0_
where
news0_.ID=?
十一月 29, 2016 3:08:32 下午 org.hibernate.property.BasicPropertyAccessor$BasicSetter set
ERROR: HHH000123: IllegalArgumentException in class: com.tt.hibernate.helloworld.News, setter method of property: date
十一月 29, 2016 3:08:32 下午 org.hibernate.property.BasicPropertyAccessor$BasicSetter set
ERROR: HHH000091: Expected type: java.sql.Date, actual value: java.sql.Timestamp
十一月 29, 2016 3:08:32 下午 org.hibernate.event.internal.DefaultLoadEventListener onLoad
INFO: HHH000327: Error performing load command : org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of com.tt.hibernate.helloworld.News.date

原因分析：

查看报错信息：说是News类的属性date的非法声明异常，查看出现date的地方：

News.java

 package com.tt.hibernate.helloworld;

 import java.sql.Date;

 public class News {

     private Integer id;
     private String title;
     private String author;

     private Date date;

     public Integer getId() {
         return id;
     }

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

     public String getTitle() {
         return title;
     }

     public void setTitle(String title) {
         this.title = title;
     }

     public String getAuthor() {
         return author;
     }

     public void setAuthor(String author) {
         this.author = author;
     }

     public Date getDate() {
         return date;
     }

     public void setDate(Date date) {
         this.date = date;
     }

     public News(String title, String author, Date date) {
         super();
         this.title = title;
         this.author = author;
         this.date = date;
     }

     public News(){

     }

     @Override
     public String toString() {
         return "News [id=" + id + ", title=" + title + ", author=" + author + ", date=" + date + "]";
     }

 }

hibernate.cfg.xml(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>

         <!-- 配置数据库的基本信息 -->
         <property name="conncection.username">root</property>
         <property name="connection.password">1234</property>
         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
         <property name="connection.url">jdbc:mysql://localhost:3306/Hibernate</property>

         <!-- 配置hibernate的基本信息 -->
         <!-- hibernate所使用的数据库方言 -->
         <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>

         <!-- 执行操作时是否在控制台打印SQL -->
         <property name="hibernate.show_sql">true</property>

         <!-- 是否对SQL进行格式化 -->
         <property name="hibernate.format_sql">true</property>

         <!-- 指定自动生成数据表的策略 -->
         <property name="hbm2ddl.auto">update</property>

         <!-- 指定关联的 .hbm.xml文档 -->
         <mapping resource="com/tt/hibernate/helloworld/News.hbm.xml"/>

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

News.hbm.xml(对象关系映射文件类)

 <?xml version="1.0"?>
 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- Generated 2016-11-28 11:43:38 by Hibernate Tools 3.5.0.Final -->
 <hibernate-mapping>
     <class name="com.tt.hibernate.helloworld.News" table="NEWS">

         <id name="id" type="java.lang.Integer">
             <column name="ID" />
             <!-- 指定主键的生成方式，native:使用数据库本地方式 -->
             <generator class="native" />
         </id>

         <property name="title" type="java.lang.String">
             <column name="TITLE" />
         </property>

         <property name="author" type="java.lang.String">
             <column name="AUTHOR" />
         </property>

         <property name="date" type="java.util.Date">
             <column name="DATE" />
         </property>

     </class>

 </hibernate-mapping>

HibernateTest.java

 package com.tt.hibernate.helloworld;

 import java.sql.Date;

 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 import org.hibernate.cfg.Configuration;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.service.ServiceRegistryBuilder;
 import org.junit.Test;

 public class HibernateTest {

     @Test
     public void test() {
         //1.创建一个SessionFactory对象
         SessionFactory sessionFactory = null;

         //1).创建configuration对象：对应hibernate的基本配置信息和对象关系映射信息
         Configuration configuration = new Configuration().configure();

         //4.0之前这样创建
         //sessionFactory = configuration.buildSessionFactory();

         //2).创建一个ServiceRegistry对象：hibernate4.x新添加的对象
         //hibernate的任何配置和服务都需要在该对象中注册后才能有效
         ServiceRegistry serviceRegistry =
                 new ServiceRegistryBuilder().applySettings(configuration.getProperties())
                 .buildServiceRegistry();

         //3).
         sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        //2.创建一个Session对象
         Session session = sessionFactory.openSession();    

        //3.开启事务
         Transaction transaction = session.beginTransaction();

        //4.执行保存操作
         News news = new News("Java","tt",new Date(new java.util.Date().getTime()));
         session.save(news);

         News news2 = (News) session.get(News.class, 1);
         System.out.println(news2);

        //5.提交事务
         transaction.commit();

       //6.关闭Session
         session.close();

       //7.关闭SessionFactory对象
         sessionFactory.close();
     }

 }

可以看出在News.java里的变量date导入的是java.sql.date包，在对应的News.hbm.xml文件里定义的变量date是java.util.Date类型，而在HibernateTest.java里传入的是java.sql.Timestamp。

      

解决办法：

将News.java里的date变量的包和其他文件一样统一成java.util.Date即可。