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我正在尝试为 MySQL 配置 Hibernate、Spring Data JPA。如果有人能指出我所缺少的东西,我将不胜感激?另外,我找不到 IllegalArgumentException 的原因。
2016-07-05 19:07:06.677 INFO 7760 --- [ main] o.s.j.d.DriverManagerDataSource : Loaded JDBC driver: com.mysql.jdbc.Driver
file:/C:/Users/eprisur/.gradle/caches/modules-2/files-2.1/org.hibernate.javax.persistence/hibernate-jpa-2.1-api/1.0.0.Final/5e731d961297e5a07290bfaf3db1fbc8bbbf405a/hibernate-jpa-2.1-api-1.0.0.Final.jar
2016-07-05 19:07:06.799 WARN 7760 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/test/authflow/config/DatabaseConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Class name must not be null
2016-07-05 19:07:06.810 INFO 7760 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2016-07-05 19:07:06.822 ERROR 7760 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/test/authflow/config/DatabaseConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Class name must not be null
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at com.test.authflow.LoginSystemApplication.main(LoginSystemApplication.java:11) [bin/:na]
Caused by: java.lang.IllegalArgumentException: Class name must not be null
at org.springframework.util.Assert.notNull(Assert.java:115) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.util.ClassUtils.convertClassNameToResourcePath(ClassUtils.java:960) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.buildDefaultPersistenceUnitInfo(DefaultPersistenceUnitManager.java:522) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.readPersistenceUnitInfos(DefaultPersistenceUnitManager.java:503) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:440) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:424) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:310) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:319) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
2016-07-05 19:07:06.825 WARN 7760 --- [ main] o.s.boot.SpringApplication : Error handling failed (Error creating bean with name 'delegatingApplicationListener' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' is defined)
我的 build.gradle 看起来像:
buildscript {
ext { springBootVersion = '1.3.3.RELEASE' }
repositories {
mavenCentral()
maven { url "https://repo.spring.io/snapshot" }
maven { url "https://repo.spring.io/milestone" }
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle plugin:${springBootVersion}")
}
}
apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'spring-boot'
jar {
manifest {
attributes 'Main-Class': 'com.test.authflow.LoginSystemApplication'
}
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenCentral()
maven { url "https://repo.spring.io/snapshot" }
maven { url "https://repo.spring.io/milestone" }
}
configurations {
providedRuntime
}
configurations {
runtime.exclude group: "org.slf4j", module: "slf4j-simple"
compile.exclude group: "org.slf4j", module: "slf4j-simple"
}
dependencies {
//for external container
providedRuntime("org.springframework.boot:spring-boot-starter-tomcat")
providedRuntime("org.apache.tomcat:tomcat-juli")
providedRuntime("org.apache.tomcat:tomcat-jdbc")
}
ext['hibernate.version'] = '5.2.1.Final'
dependencies {
compile ('org.springframework.boot:spring-boot-starter')
compile("org.springframework.boot:spring-boot-starter-web")
compile("org.springframework.boot:spring-boot-starter-data-jpa")
compile("org.springframework.boot:spring-boot-starter-security")
compile("mysql:mysql-connector-java")
}
task wrapper(type: Wrapper) {
gradleVersion = '2.13'
}
这是我的 DatabaseConfig 类:
package com.test.authflow.config;
import java.util.Properties;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@PropertySource(value = { "application.properties" })
@EnableTransactionManagement
public class DatabaseConfig {
@Bean
public DataSource dataSource()
{
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("db.driver"));
dataSource.setUrl(env.getProperty("db.url"));
dataSource.setUsername(env.getProperty("db.username"));
dataSource.setPassword(env.getProperty("db.password"));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em =
new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
// Classpath scanning of @Component, @Service, etc annotated class
em.setPackagesToScan(
env.getProperty("em.setPackagesToScan"));
//Vendor Adapter
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
//Hibernate Properties
Properties additionalProperties = new Properties();
additionalProperties.put(
"hibernate.dialect",
env.getProperty("hibernate.dialect"));
additionalProperties.put(
"hibernate.show_sql",
env.getProperty("hibernate.dialect"));
additionalProperties.put(
"hibernate.hbm2ddl.auto",
env.getProperty("hibernate.hbm2ddl.auto"));
em.setJpaProperties(additionalProperties);
System.out.println(EntityManager.class.getProtectionDomain()
.getCodeSource()
.getLocation());
return em;
}
@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager transactionManager =
new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
public PersistenceExceptionTranslationPostProcessor ExceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
@Autowired
private Environment env;
}
最佳答案
根据 DefaultPersistenceUnitManager.java:第 522 行问题是您没有设置 packagesToScan
for (String pkg : this.packagesToScan) {
try {
String pattern = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +
ClassUtils.convertClassNameToResourcePath(pkg) + CLASS_RESOURCE_PATTERN;
public static String convertClassNameToResourcePath(String className) {
Assert.notNull(className, "Class name must not be null");
return className.replace(PACKAGE_SEPARATOR, PATH_SEPARATOR);
}
所以你可以检查你的代码em.setPackagesToScan(env.getProperty("em.setPackagesToScan"));
env.getProperty("em.setPackagesToScan")为空;
关于mysql - 创建bean时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38205696/
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