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。