我正在尝试将我的应用程序从JDBC移动到Spring JPA。
我扩展了CrudRepository,并创建了自己的DAO界面org.springframework.data
public interface IMyRepository extends CrudRepository<MyEntity, Long> {
// Queries
}
但是,IMyRepositoty
bean不会使用以下XML配置创建。
<?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:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:repository="http://www.springframework.org/schema/data/repository"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
http://www.springframework.org/schema/data/repository
http://www.springframework.org/schema/data/repository/spring-repository.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<context:component-scan base-package="com.project.dao" />
<bean id="projectDataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
autowire-candidate="true">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://ABC:3306/project" />
<property name="username" value="userA" />
<property name="password" value="1234" />
</bean>
<bean id="projectEntityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="projectDataSource" />
<property name="packagesToScan" value="com.project.dao" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
</props>
</property>
</bean>
<bean id="projectJpaTransactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="projectEntityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="projectJpaTransactionManager" />
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<!-- <jpa:repositories base-package="com.project.dao"/> -->
</beans>
错误是:
No qualifying bean of type [com.project.dao.IMyRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
搜索了很多文章,发现需要添加
Caused by: org.xml.sax.SAXParseException; lineNumber: 68; columnNumber: 69; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'jpa:repositories'.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
我错过了什么吗?提前感谢!
更多信息,在模块的依赖项中,我有:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<version>2.0.5.RELEASE</version>
</dependency>
</dependencies>
并且父模块依赖于:spring-jdbc、spring-test、spring-core、spring-content-support、spring-orm
版本4.1.6的所有内容。RELEASE
来自JPA存储库上的Spring Docs:
您需要添加此命名空间JPA存储库支持:
xmlns: jp a="http://www.springframework.org/schema/data/jpa"
以及JPA模式位置:
xsi:schemaLocation="http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"
这是您的xml文件中缺少的。这就是您收到该模式错误的原因。
试试这个:
<?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:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
<jpa:repositories base-package="com.project.dao" />
</beans>
它应该工作。
在您的Application类上,您必须使用:
@EnableJpaRepositories(basePackages="您的存储库目录")
并将IMyRepositoty注释为
@存储库