java - 通过 'sessionFactory' 不满足的依赖关系;没有可用的“org.hibernate.SessionFactory”类型的合格 bean
问题描述
我正在创建一个 spring-mvc 和 hibernate webapp。我正在尝试通过创建项目(因此使用 xml 配置)来测试书中阅读的文本。以前有人问过这类问题,但我无法让我的项目使用所提供的答案。到达终点时出现以下错误:
[WARNING] Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'categoryController': Unsatisfied dependency expressed through field 'categoryService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'categoryServiceImpl': Unsatisfied dependency expressed through field 'categoryDAO'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'categoryDAOImpl': Unsatisfied dependency expressed through field 'sessionFactory'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.hibernate.SessionFactory' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=sessionFactory)}
[ERROR] Context initialization failed
这是@Configuration 类
@Configuration
@ComponentScan(basePackages= {"pizzaml.rest", "pizzaml.service", "pizzaml.dao"})
@EnableWebMvc
public class AppConfig {
@Bean(name="sessionFactory")
public SessionFactory sessionFactory( @Qualifier("dataSource") DataSource dataSource) throws MalformedURLException {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setConfigLocation(new FileUrlResource("/hibernate-cfg.xml"));
return sessionFactory.getObject();
}
@Bean(name="dataSource")
public DataSource dataSource( @Value("{db.user}") String user, @Value("{db.pass}") String pass, @Value("{db.url}") String url, @Value("{db.driverclass}") String driverClass) {
BasicDataSource datasource = new BasicDataSource();
datasource.setDriverClassName(driverClass);
datasource.setUsername(user);
datasource.setPassword(pass);
datasource.setUrl(url);
return datasource;
}
}
这是hibernate-cfg.xml
<!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>
<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<mapping resource="pizzaml/entity/Category.hbm.xml"></mapping>
</session-factory>
</hibernate-configuration>
道-
@Repository
public class CategoryDAOImpl implements CategoryDAO {
@Autowired
@Qualifier("sessionFactory")
SessionFactory sessionFactory;
@Override
public String addCategory(String categoryname) throws BusinessProcessException {
Session session = sessionFactory.openSession();
Query query = session.getNamedQuery("Category.byName");
List<Category> list = query.list();
if(Objects.nonNull(list) && (!list.isEmpty()) )
throw new BusinessProcessException("Category already exists!");
Category category = new Category();
category.setName(categoryname);
session.save(category);
session.flush();
session.close();
return AppCodes.SUCCESS;
}
}
pom.xml
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.22.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.8.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.2.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.3</version>
<configuration>
<outputDirectory>./target</outputDirectory>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>4500</port>
<path>/</path>
</configuration>
</plugin>
</plugins>
解决方案
您的 Hibernate 映射可能有问题,但是由于您没有发布有助于理解错误所在的整个堆栈跟踪,因此没有什么可以帮助您的。除此之外,我强烈建议您使用 Hibernate 的注释模型,因为 HBM XML 方法将在即将发布的版本之一中被 JPA orm.xml 方法取代。
推荐阅读
- javascript - 使用 Chrome 扩展程序编辑网站的 HTML 代码
- c# - 以另一种形式运行 C# 函数
- c++ - C++ Dll 库在第二次清除后在 vector.push_back 上崩溃
- kotlin - 如何在不需要时启动可以“关闭”的多个流?
- javascript - 将过滤器连接到多个图表 asp.net core mvc
- javascript - 使用startsWith()定义元素中的值范围 - jQuery
- node.js - 如何一次更新 Cloud Firebase 中某个字段的每个文档?
- android - Flutter: Json File not loading when running on connected device or built to apk
- java - How can I use a library from GitHub in android studio?
- php - 试图获取非对象的属性 'id' {"exception":"[object]