【发布时间】：2016-07-19 11:11:11
【问题描述】：
我正在尝试一个 spring-boot-starter 项目。并用 jpa 尝试一个简单的项目，后面有一个 POSTGRES db。但是，在启动应用程序时，我会收到 ClassNotFoundException:
Caused by: java.lang.ClassNotFoundException: org.hibernate.boot.model.naming.ImplicitNamingStrategy
但这怎么可能呢？我认为 spring-boot-starter-jpa 会依赖 maven 会处理所有必需的依赖...
@Configuration
@PropertySource("classpath:application.properties")
public class AuthConfiguration {
@Value("${hibernate.driver_class}")
private String DATABASE_DRIVER_CLASS;
@Value("${hibernate.url}")
private String DATABASE_URL;
@Value("${hibernate.username}")
private String DATABASE_USER;
@Value("${hibernate.password}")
private String DATABASE_PASSWORD;
@Value("${hibernate.dialect}")
private String HIBERNATE_DIALECT;
@Value("${hibernate.packages_to_scan}")
private String HIBERNATE_PACKAGES_TO_SCAN;
@Bean
public DataSource dataSource() {
final DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(DATABASE_DRIVER_CLASS);
dataSource.setUrl(DATABASE_URL);
dataSource.setUsername(DATABASE_USER);
dataSource.setPassword(DATABASE_PASSWORD);
return dataSource;
}
@Bean
public HibernateTransactionManager transactionManager() {
final HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionFactory().getObject());
return transactionManager;
}
@Bean
public LocalSessionFactoryBean sessionFactory() {
final LocalSessionFactoryBean localSessionFactoryBean =
new LocalSessionFactoryBean();
localSessionFactoryBean.setDataSource(dataSource());
localSessionFactoryBean.setPackagesToScan(HIBERNATE_PACKAGES_TO_SCAN);
{
final Properties properties = new Properties();
properties.put("hibernate.dialect", HIBERNATE_DIALECT);
localSessionFactoryBean.setHibernateProperties(properties);
}
return localSessionFactoryBean;
}
}
我正在使用的属性
hibernate.driver_class = org.postgresql.Driver
hibernate.datasource_class = org.postgresql.ds.PGSimpleDataSource
hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
hibernate.url = jdbc:postgresql://localhost:5432/test
hibernate.username = postgres
hibernate.password = password
hibernate.show_sql=false
hibernate.generate_statistics=false
hibernate.packages_to_scan=com.test.model
这是我的 Maven 设置
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>auth</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>auth</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1201-jdbc41</version>
</dependency>
<!--
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.6.0</version>
</dependency>-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我不知道如何解决这个问题。添加 hibernate-core 依赖本身并没有解决它，因为我在另一篇 stackoverflow 帖子上阅读过，但这样做也感觉不好，因为一切都应该在 starter 依赖中......
任何想法我错过了什么？
【问题讨论】：
-
您在类路径中有哪个 Hibernate 版本具有这些依赖项？
-
作为旁注，Spring Boot 会处理您在 @Configuration 类中所做的一切。您不需要自己配置 Hibernate，只需使用 Spring 数据抽象：docs.spring.io/spring-data/jpa/docs/current/reference/html 并使用 Spring Boot given application properties，而不是自己为 Hibernate 配置那些。只需按照
Spring Boot: Accessing Data with JPA教程：spring.io/guides/gs/accessing-data-jpa
标签： hibernate spring-boot classnotfoundexception