java - 在 JodaTime 中使用 Hibernate 注释的问题

我回来了，因为我在使用 JodaTime 时仍然遇到问题。在前面的评论之后，我修改了我的 pom 并且 @Type 注释 是固定的。这是我的新 pom:

<properties>
    <org.springframework.version>3.0.3.RELEASE</org.springframework.version>
    <hibernate.version>3.6.0.Beta1</hibernate.version>
</properties>
<dependencies>
     ...
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>${hibernate.version}</version>
        <type>jar</type>
        <scope>compile</scope>
    </dependency>

    <!-- Spring Dependencies -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>3.0.2.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>20030825.184428</version>
    </dependency>
    <dependency>
        <groupId>commons-pool</groupId>
        <artifactId>commons-pool</artifactId>
        <version>20030825.183949</version>
    </dependency>
    <dependency>
        <groupId>commons-validator</groupId>
        <artifactId>commons-validator</artifactId>
        <version>1.3.1</version>
        <classifier>sources</classifier>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.5</version>
    </dependency>

    <!-- Joda Time dependencies -->
    <dependency>
        <artifactId>joda-time</artifactId>
        <groupId>joda-time</groupId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time-jsptags</artifactId>
        <version>1.0.2</version>
    </dependency>
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time-hibernate</artifactId>
        <version>1.2</version>
        <type>jar</type>
        <scope>compile</scope>
    </dependency>
</dependencies>

我实际上正在开发一个我使用 Spring 和 Hibernate 的个人项目。我还使用 JodaTime 来保存日期字段。当我使用 Junit4 进行单元测试时，我发现了这个异常:

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [spring/spring-dao.xml]: Invocation of init method failed; nested exception is java.lang.IncompatibleClassChangeError: Implementing class
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1412)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
  ....  
fr.cc2i.intervention.dao.test.WebInterventionTest.oneTimedSetUp(WebInterventionTest.java:33)
    .....
    Caused by: java.lang.IncompatibleClassChangeError: Implementing class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
    at java.lang.Class.getConstructor0(Class.java:2699)
    at java.lang.Class.getDeclaredConstructor(Class.java:1985)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104)
    at 
           .....

根据该网站:http://www.mail-archive.com/joda-interest@lists.sourceforge.net/msg00609.html，jodatime 可能会导致错误。

谁能给我解释一下什么是:java.lang.incompatibleChangeError : Implementing Class？以及如何解决这个问题？

我的 Spring 配置:

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource"> <ref local="dataSource" /></property> 
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.current_session_context_class">thread</prop>
            <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>

            <!-- Pour les requetes SQL -->
            <prop key="hibernate.query.substitutions">true 1, false 0, yes 'Y', no 'N'</prop>

            <!-- manipuler avec attention       -->
            <prop key="hibernate.hbm2ddl.auto">create</prop>
            <prop key="hibernate.hbm2ddl.auto">update</prop>

        </props>
    </property>
    <property name="annotatedClasses">
        <list>
            <value>fr.cc2i.intervention.dao.beans.Client</value>
            <value>fr.cc2i.intervention.dao.beans.Intervention</value>
            <value>fr.cc2i.intervention.dao.beans.Technicien</value>
            <value>fr.cc2i.intervention.dao.beans.Contrat</value>               
        </list>
    </property>
</bean>

我的实体类:

    package fr.cc2i.intervention.dao.beans;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.Type;
import org.joda.time.Period;

/**
 * Classe définissant un contrat
 * My code is written in French ;)
 * @author lindows
 *
 */
@Entity
@Table(name="T_Contrat")
public class Contrat {

    private long id;

    private String reference;

    private Period heures_totales;

    private Period heures_restantes;


    public Contrat(){}

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    public long getId() {
        return id;
    }

    private void setId(long id) {
        this.id = id;
    }


    public String getReference() {
        return reference;
    }

    public void setReference(String reference) {
        this.reference = reference;
    }

    @Column
    @Type(type="org.joda.time.contrib.hibernate.PersistantPeriod")
    public Period getHeures_totales() {
        return heures_totales;
    }

    public void setHeures_totales(Period heuresTotales) {
        heures_totales = heuresTotales;
    }

    @Column
    @Type(type="org.joda.time.contrib.hibernate.PersistantPeriod")
    public Period getHeures_restantes() {
        return heures_restantes;
    }

    public void setHeures_restantes(Period heuresRestantes) {
        heures_restantes = heuresRestantes;
    }

    public String toString(){
        return this.reference + " - \n Heures totales :" + this.heures_totales.toString() + 
         " Heures Restantes : " + this.heures_restantes.toString();
    }

}

谢谢你的帮助

最佳答案

正如我在评论中所写，您的 pom.xml 很乱，这在某种程度上是问题的根本原因。这是完整的解释。

根据公告Simultaneous Hibernate 3.5.4 and 3.6.0.Beta1 Releases下面引用的是，hibernate-annotations 模块已被合并到 Hibernate 3.6.x 的核心中(这成为可能，因为 Hibernate 3.6.x 正在放弃 JDK 1.4 支持):

3.6.0.Beta1

3.6 introduces some new features as well as incorporating most of the fixes from 3.5. Changes of particular interest include

Dropping support for JDK 1.4

merging some modules into core; specifically hibernate-jmx and hibernate-annotations

repackaging of classes in hibernate-testing

HHH-2277 : fixes a long known limitation in key-many-to-one support.

HHH-5138, HHH-5182, HHH-5262 : collectively address a number of improvements to the "Hibernate type system". See the newly separated and expanded chapter on Types in the reference manual for details.

HHH-5268 : java.util.UUID support

For more details about 3.6.0.Beta1, including the full list of changes, see the release page.

事实上，hibernate-annotations-3.6-SNAPSHOT.jar 的最新版本实际上是临时构建的空 jar (因为合并)，直到完全删除 maven 模块本身。但是因为您没有使用 hibernate-core-3.6-SNAPSHOT.jar，所以您根本就没有 @Type 注释。

现在，这是我的建议/评论的摘要:

使用 Maven 传递依赖解析机制，如果您想使用 JPA，请不声明所有依赖，只声明“顶级”依赖，即 hibernate-entitymanager。<
从 3.5 版开始，Hibernate Core、Annotations、EntityManager 一起发布，它们的版本同步。
如果你想使用 Hibernate 3.6.x(现在有 Beta2)，@Type 在 hibernate-core 中(如果你使用 transitive，这并不重要依赖项)。
除非您确切地知道自己在做什么，否则我不建议您依赖 SNAPSHOT。

所以你的 pom.xml 应该为 Hibernate 声明这样的东西:

<project>
  ...
  <properties>
    <!--hibernate.version>3.4.O.GA</hibernate.version-->    <!-- for JPA 1.0 -->
    <hibernate.version>3.5.4-Final</hibernate.version>      <!-- for JPA 2.0 -->
    <!--hibernate.version>3.6.0.Beta2</hibernate.version--> <!-- experimental -->
  <properties>
  ...
  <dependencies>
    <!-- Hibernate dependencies -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>${hibernate.version}</version>
    </dependency>
    ...    
  </dependencies>
  ...
</project>

这就是您所需要的。

关于java - 在 JodaTime 中使用 Hibernate 注释的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3472851/

java - 在 JodaTime 中使用 Hibernate 注释的问题

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