我在 SpringMVC 中将数据刷新到 PostgreSQL 数据库时遇到问题。当我使用 entityManager.flush() 时。
该表是在 PosgreSQL 中创建的，我可以使用 pgadmin3 并且它存在，但问题是在我将元素从控制器传递到 ImageDaoImpl 后，它没有将记录推送到数据库；/
@Repository
@Transactional(propagation = Propagation.REQUIRED)
public class ImageDaoImpl implements ImageDao {
@PersistenceContext
private EntityManager em;
@Transactional
public void register(Image image) {
em.persist(image);
em.flush();
return;
}
}
当我想做注册方法时，它给了我一个错误。
javax.persistence.TransactionRequiredException: no transaction is in progress
我试着做：
@Transactional
public void register(Image image) {
em.getTransaction().begin();
em.persist(image);
em.getTransaction().commit();
return;
}
但它把我扔了：
threw exception: java.lang.IllegalStateException: Not allowed to create transaction on shared EntityManager - use Spring transactions or EJB CMT instead
首先，我认为有问题并首先添加@PersistenceContext。
我发现EntityManager 不能使用持久保存元素到数据库
并尝试添加
<tx:annotation-driven transaction-manager="transactionManager"/>
和
<bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
但后来我想怎么不可能附加经理：然后我收到这样的错误：
java.lang.ClassNotFoundException: org.springframework.jdbc.datasource.JdbcTransactionObjectSupport
接下来做什么？我如何<jee:jndi-lookup jndi-name="java:jboss/spring-quickstart/persistence" id="entityManagerFactory" ...与 transactionManager 集成？它们之间有什么区别？我应该使用哪一个来连接数据库？
也许还有另一个我看不到的问题。
我已经设置了所有数据库连接，但是刷新问题让我发疯了。我没有尝试从浏览器中的实体读取信息，在此之前我想将信息推送到数据库。
我读了 Spring jta-transaction-manager
并试图评论该行
但它把我扔了：（MSC服务线程1-2）上下文初始化失败：java.lang.NoClassDefFoundError：org/springframework/orm/jpa/JpaTransactionManager$JpaTransactionObject
为什么找不到合适的解决方案： EntityManager persist() 方法不向数据库插入记录 我应该在哪里注册类 Image 以进行事务？
这是控制器的片段。
@RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(
@ModelAttribute("uploadForm") ImageDaoImpl uploadForm,
Model map, BindingResult result) throws IllegalStateException, IOException {
...
String filePath = fileCatalog + orgName;
Image memberImage = new Image();
memberImage.setFilePath(filePath);
imageDao.register(memberImage);
...
}
}
我创建对象并在数据库中设置一个我需要的值。我得到的文件保存在硬盘中。我稍后需要它用于我的另一个程序。这是在应用程序中注册对象的好方法。也许这是它没有刷新到数据库的原因？
最后我附上我的配置文件：
图像域：
@Entity
@Table(name="IMAGES")
public class Image {
@Id
@Column(name="ID")
@GeneratedValue
private Integer id;
@Column(name="NAME")
private String name;
@Column(name="CONTENTTYPE")
private String contentType;
@Column(name="LENGTH")
private Integer length;
@Column(name="ISPOCESSED")
private boolean isprocessed;
@Column(name="CONTENT")
@Lob
private Blob content;
@Column(name="FILEPATH")
private String filepath;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setFilePath(String filepath) {
this.filepath = filepath;
}
public String getFilePath(){
return filepath;
}
public void setName(String name) {
this.name = name;
}
public String getContentType() {
return contentType;
}
public void setContentType(String contentType) {
this.contentType = contentType;
}
public Blob getContent() {
return content;
}
public void setContent(Blob content) {
this.content = content;
}
public Integer getLength() {
return length;
}
public void setLength(Integer length) {
this.length = length;
}
}
META-INF/spring/ApplicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<context:component-scan base-package="org.springmvc.trophy.domain"/>
<context:component-scan base-package="org.springmvc.trophy.repo"/>
<tx:annotation-driven />
</beans>
META-INF/spring/infrastructure.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee.xsd">
<!-- JDNI name for EntityManagerFactory is defined in src/main/resources/META-INF/persistence.xml -->
<jee:jndi-lookup jndi-name="java:jboss/spring-quickstart/persistence" id="entityManagerFactory"
expected-type="javax.persistence.EntityManagerFactory" />
<bean id="entityManager" class="org.springframework.orm.jpa.support.SharedEntityManagerBean">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<tx:jta-transaction-manager />
</beans>
META-INF/Persistance.xml
<persistence version="2.0"
xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="primary" transaction-type="RESOURCE_LOCAL">
<!-- If you are running in a production environment, add a managed data
source, this example data source is just for development and testing! -->
<!-- The datasource is deployed as WEB-INF/spring-quickstart-ds.xml, you
can find it in the source at src/main/webapp/WEB-INF/spring-quickstart-ds.xml -->
<jta-data-source>java:jboss/datasources/ImagesDS</jta-data-source>
<properties>
<property name="jboss.entity.manager.factory.jndi.name"
value="java:jboss/spring-quickstart/persistence" />
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.format_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
webapp/WEB-INF/images-ds.xml
<?xml version="1.0" encoding="UTF-8"?>
<datasources xmlns="http://www.jboss.org/ironjacamar/schema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.jboss.org/ironjacamar/schema http://docs.jboss.org/ironjacamar/schema/datasources_1_0.xsd">
<!-- The datasource is bound into JNDI at this location. We reference this
in META-INF/persistence.xml -->
<datasource jndi-name="java:jboss/datasources/ImagesDS"
pool-name="kitchensink-quickstart" enabled="true" jta="false" use-java-context="true" use-ccm="false">
<connection-url>jdbc:postgresql://localhost:5432/dermadb</connection-url>
<driver-class>org.postgresql.Driver</driver-class>
<driver>postgresql-9.1-901.jdbc4.jar</driver>
<security>
<user-name>username</user-name>
<password>dbpassword</password>
</security>
</datasource>
</datasources>
我为 PostgreSQL 部署了模块：在 webapp/WEB-INF/jboss-deployment-structure.xml
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.0">
<deployment>
<dependencies>
<module name="org.postgresql"/>
<!-- <module name="com.h2database.h2"/> -->
<module name="org.codehaus.jackson.jackson-core-asl"/>
<module name="org.codehaus.jackson.jackson-mapper-asl"/>
<module name="org.slf4j"/>
</dependencies>
</deployment>
</jboss-deployment-structure>
提前感谢您的回答。