응용 프로그램을 다시 실행할 때 값이 데이터베이스에서 삭제됩니다.

Question

Spring + Hibernate + ZK 프레임 워크에서 샘플 응용 프로그램을 만들었습니다. Hibernate 구성 파일에서 hbm2ddl.auto 속성을 "update"모드로 유지했습니다. 아직도 응용 프로그램을 다시 실행할 때마다 이전에 값을 유지하지 않습니다. 다음

은 참조를 위해 몇 가지 구성 파일입니다

BeanLocations.xml

<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:context="http://www.springframework.org/schema/context" 
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-2.5.xsd"> 

    <!-- Database Configuration --> 
    <import resource="../database/DataSource.xml"/> 
    <import resource="../database/Hibernate.xml"/> 

    <!-- Auto scan the components --> 
    <context:component-scan 
     base-package="com.nagarro" /> 

</beans> 

DataSource.xml

<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 

    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 
     <property name="location"> 
      <value>properties/database.properties</value> 
     </property> 
    </bean> 

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
     <property name="driverClassName" value="${jdbc.driverClassName}" /> 
     <property name="url" value="${jdbc.url}" /> 
     <property name="username" value="${jdbc.username}" /> 
     <property name="password" value="${jdbc.password}" /> 
     <!-- <property name="hibernate.current_session_context_class" value = "${hibernate.current_session_context_class}" /> --> 
    </bean> 

</beans> 

Hibernate.xml

<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd" 
    xmlns:tx="http://www.springframework.org/schema/tx"> 

    <!-- Hibernate session factory --> 
    <bean id="sessionFactory" 
     class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
     <property name="dataSource"> 
      <ref bean="dataSource" /> 
     </property> 
     <property name="hibernateProperties"> 
      <props> 
       <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> 
       <prop key="hibernate.show_sql">true</prop> 
       <prop key="hibernate.hbm2ddl.auto">update</prop> 

      </props> 
     </property> 

     <property name="annotatedClasses"> 
      <list> 

       <value>com.nagarro.model.ItemAttribute</value> 
       <value>com.nagarro.model.ItemAttributeGroup</value> 
      </list> 
     </property> 
    </bean> 

</beans> 

컨트롤러/뷰 모델 클래스

public class ItemAttributeRenderer { 

    /* 
    * The Logger reference variable used for Logging. 
    */ 
    static private final Logger LOG = LoggerFactory.getLogger(ItemAttributeRenderer.class); 

    @Autowired 
    private ItemAttributeService itemAttrService; 

    private List<ItemAttribute> itemList = new ArrayList<ItemAttribute>(); 

    private void prepareAndSaveItemAttributeData(){ 
     ItemAttribute item = null; 
     int counter; 
     for(int index = 0; index < 5; index++){ 
      counter = index+1; 
      item = new ItemAttribute("Item "+counter, "Attirbute Value"+counter, "Qualifier Value"+counter); 
      itemAttrService.save(item); 
     } 
    } 
    /** 
    * @return the itemList 
    */ 
    public List<ItemAttribute> getItemList() { 
     ApplicationContext appContext = new ClassPathXmlApplicationContext("/spring/config/BeanLocations.xml"); 
     itemAttrService = (ItemAttributeService)appContext.getBean("itemAttrService"); 
     prepareAndSaveItemAttributeData(); 
     itemList = itemAttrService.getItemAttributeList(); 
     return itemList; 
    } 

    @Command 
    public void save(){ 
     for(ItemAttribute item : itemList){ 
      itemAttrService.update(item); 
     } 

    } 

    /** 
    * @param itemList the itemList to set 
    */ 
    public void setItemList(List<ItemAttribute> itemList) { 
     this.itemList = itemList; 
    } 
    /** 
    * @return the itemAttrService 
    */ 
    public ItemAttributeService getItemAttrService() { 
     return itemAttrService; 
    } 
    /** 
    * @param itemAttrService the itemAttrService to set 
    */ 

    public void setItemAttrService(ItemAttributeService itemAttrService) { 
     this.itemAttrService = itemAttrService; 
    } 



} 

보기 파일 :

<?page title="Result"?> 
<zk> 
    <custom-attributes center="${arg.center }" /> 
    <window apply="org.zkoss.bind.BindComposer" 
     viewModel="@id('vm') @init('com.nagarro.viewmodel.ItemAttributeRenderer')" 
     title="Result Window" border="normal"> 
     <div> 
      <grid> 
       <rows> 
        <row> 
         <listbox model="@bind(vm.itemList)"> 
          <listhead> 
           <listheader label="Item Name" 
            style="text-align:center;"> 
           </listheader> 
           <listheader label="Attribute Value" 
            style="text-align:center;"> 
           </listheader> 
           <listheader label="Qualifier Value" 
            style="text-align:center;"> 
           </listheader> 
          </listhead> 
          <template name="model" var="item"> 
           <listitem value="${item }"> 
            <listcell label="@load(item.name)" 
             style="text-align:center;"> 

            </listcell> 
            <listcell style="text-align:center;"> 
            <textbox value="@bind(item.attributeValue)" 
             style="text-align:center;"/> 

            </listcell> 
            <listcell 
             label="@load(item.qualifierValue)" 
             style="text-align:center;"> 
            </listcell> 
           </listitem> 
          </template> 
         </listbox> 
        </row> 
       </rows> 
      </grid> 
     </div> 
     <div style="text-align:right; padding:10px;"> 
      <button label="Save" mold="trendy" 
       onClick="@command('save')"> 
      </button> 

     </div> 
    </window> 
</zk> 

서비스 클래스

@Service("itemAttrService") 
public class ItemAttributeServiceImpl implements ItemAttributeService{ 

    @Autowired 
    ItemAttributeDao itemAttrDao; 

    public void setItemAttrDao(ItemAttributeDao itemAttrDao) { 
     this.itemAttrDao = itemAttrDao; 
    } 


    public void save(ItemAttribute item){ 
     itemAttrDao.save(item); 

    } 

    public void update(ItemAttribute item){ 
     itemAttrDao.update(item); 

    } 

    public void delete(ItemAttribute item){ 
     itemAttrDao.delete(item); 
    } 

    public ItemAttribute findByItemAttributeName(String name){ 
     return itemAttrDao.findByItemAttributeName(name); 
    } 

    public List<ItemAttribute> getItemAttributeList(){ 
     return itemAttrDao.getItemAttributeList(); 
    } 

} 

DAO 클래스

@Repository("itemAttrDao") 
public class ItemAttributeDaoImpl extends CustomHibernateDaoSupport implements ItemAttributeDao { 


    public void save(ItemAttribute itemAttribute) { 
     getHibernateTemplate().save(itemAttribute); 
     //getHibernateTemplate().getSessionFactory().getCurrentSession().getTransaction().commit(); 
    } 


    public void update(ItemAttribute itemAttribute) { 
     getHibernateTemplate().update(itemAttribute); 
     //getHibernateTemplate().getSessionFactory().getCurrentSession().getTransaction().commit(); 
    } 


    public void delete(ItemAttribute itemAttribute) { 
     getHibernateTemplate().delete(itemAttribute); 
     //getHibernateTemplate().getSessionFactory().getCurrentSession().getTransaction().commit(); 
    } 


    public ItemAttribute findByItemAttributeName(String name) { 
     List list = getHibernateTemplate().find("from ItemAttribute where name=?",name); 
     if(list == null){ 

     }else if(list.isEmpty()){ 

     } 
     return (ItemAttribute)list.get(0); 
    } 


    public List<ItemAttribute> getItemAttributeList() { 
     List<ItemAttribute> itemList = getHibernateTemplate().find("from ItemAttribute "); 
     return itemList; 
    } 

} 

의 pom.xml :

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>com.abc</groupId> 
    <artifactId>ZKSpringHibernateExample</artifactId> 
    <packaging>war</packaging> 
    <version>1.0-SNAPSHOT</version> 
    <name>SpringHibernateExample</name> 
    <url>http://maven.apache.org</url> 

    <repositories> 
     <repository> 
      <id>java.net</id> 
      <url>http://download.java.net/maven/2/</url> 
     </repository> 
    </repositories> 
    <properties> 
     <org.springframework.version>3.0.5.RELEASE</org.springframework.version> 
    </properties> 

    <dependencies> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>3.8.1</version> 
      <scope>test</scope> 
     </dependency> 

     <!-- Spring framework --> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-core</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-beans</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-context</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-tx</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-orm</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-web</artifactId> 
      <version>${org.springframework.version}</version> 
     </dependency> 



        <!-- MySQL database driver --> 
     <dependency> 
      <groupId>mysql</groupId> 
      <artifactId>mysql-connector-java</artifactId> 
      <version>5.1.9</version> 
     </dependency> 

     <!-- Hibernate framework --> 


     <dependency> 
      <groupId>org.hibernate</groupId> 
      <artifactId>hibernate-core</artifactId> 
      <version>3.6.3.Final</version> 
     </dependency> 

     <dependency> 
      <groupId>javassist</groupId> 
      <artifactId>javassist</artifactId> 
      <version>3.12.1.GA</version> 
     </dependency> 


     <!-- Hibernate library dependecy start --> 
     <dependency> 
      <groupId>dom4j</groupId> 
      <artifactId>dom4j</artifactId> 
      <version>1.6.1</version> 
     </dependency> 

     <dependency> 
      <groupId>commons-logging</groupId> 
      <artifactId>commons-logging</artifactId> 
      <version>1.1.1</version> 
     </dependency> 

     <dependency> 
      <groupId>commons-collections</groupId> 
      <artifactId>commons-collections</artifactId> 
      <version>3.2.1</version> 
     </dependency> 

     <dependency> 
      <groupId>antlr</groupId> 
      <artifactId>antlr</artifactId> 
      <version>2.7.7</version> 
     </dependency> 
     <!-- Hibernate library dependecy end --> 

     <!-- ZK Dependency start --> 
     <dependency> 
      <groupId>org.zkoss.zk</groupId> 
      <artifactId>zkplus</artifactId> 
      <version>6.0.0</version> 
     </dependency> 
     <dependency> 
      <groupId>org.zkoss.zk</groupId> 
      <artifactId>zhtml</artifactId> 
      <version>6.0.0</version> 
     </dependency> 
     <dependency> 
      <groupId>org.zkoss.zk</groupId> 
      <artifactId>zkbind</artifactId> 
      <version>6.0.0</version> 
     </dependency> 
     <dependency> 
      <groupId>org.zkoss.zk</groupId> 
      <artifactId>zul</artifactId> 
      <version>6.0.0</version> 
     </dependency> 
     <!-- ZK Dependency Ends --> 

    </dependencies> 
</project> 

내 문제는 응용 프로그램을 다시 실행할 때 hbm2ddl.auto 속성을 업데이트 모드로 설정 했더라도 이전에 저장 한 모든 데이터가 사라집니다. 해고당하는 쿼리를 확인하기 위해 show_sql 속성을 "true"로 설정했지만 해고되는 삭제 쿼리는 없습니다. 여기에서 누락 된 다른 중요한 것이 있습니까?

Answer 1

해결책을 찾았습니다. 내 Tomcat에 많은 지저분한 프로젝트 종속성이있어서 Tomcat의 해당 인스턴스를 삭제하고 프로젝트에 맞게 재구성했습니다. 그럼 내 프로젝트를 청소하고 지금 해야하는대로 모든 일을 잘하고있다. 답변을 게시하는 데 시간을내어 주셔서 감사합니다.

Answer 2

하는 속성 드롭 이상 수동 here

<property name="hbm2ddl.auto">update</property> 

설정 최대 절전 모드 주석을 참조 읽기

최대 절전 설명서 의견 아래 고려 시작시 데이터베이스 스키마를 재 작성하십시오.

영속 컨텍스트에 대한 Hibernate의 자동 세션 관리는 특히이 컨텍스트에서 유용합니다. hbm2ddl.auto 옵션은 데이터베이스 스키마를 데이터베이스에 자동 생성하도록 설정합니다. 이 옵션은 구성 옵션을 제거하여 해제하거나 SchemaExport Ant 태스크를 사용하여 파일로 리디렉션 할 수도 있습니다.

Answer 3

hbm2ddl.auto은 여기서는 의미가없는 데이터베이스 스키마의 유효성 검사를위한 것입니다.

값을 커밋해야만 데이터베이스에 영구 저장되지 않으면 커밋해야합니다.