Java SE + Spring Data + Hibernate
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Java SE + Spring Data + Hibernate
提问by ChrisGeo
I am trying to start a Java SE application with Spring Data + Hibernate and have done the follwowing till now:
我正在尝试使用 Spring Data + Hibernate 启动 Java SE 应用程序，并且到目前为止已经完成了以下操作：
Configuration File
配置文件
@Configuration
@PropertySource("classpath:hibernate.properties")
@EnableJpaRepositories
@EnableTransactionManagement
public class JpaConfiguration {
private static final String PROPERTY_NAME_DATABASE_DRIVER = "db.driver";
private static final String PROPERTY_NAME_DATABASE_PASSWORD = "db.password";
private static final String PROPERTY_NAME_DATABASE_URL = "db.url";
private static final String PROPERTY_NAME_DATABASE_USERNAME = "db.username";
private static final String PROPERTY_NAME_HIBERNATE_DIALECT = "hibernate.dialect";
private static final String PROPERTY_NAME_HIBERNATE_SHOW_SQL = "hibernate.show_sql";
private static final String PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN =
"entitymanager.packages.to.scan";
@Resource
private Environment env;
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(
env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
dataSource.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_URL));
dataSource.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME));
dataSource.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new
LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource());
entityManagerFactoryBean.setPersistenceProviderClass(org.hibernate
.jpa.HibernatePersistenceProvider.class);
entityManagerFactoryBean.setPackagesToScan(env.
getRequiredProperty(PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN));
entityManagerFactoryBean.setJpaProperties(hibProperties());
return entityManagerFactoryBean;
}
private Properties hibProperties() {
Properties properties = new Properties();
properties.put(PROPERTY_NAME_HIBERNATE_DIALECT,
env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_DIALECT));
properties.put(PROPERTY_NAME_HIBERNATE_SHOW_SQL,
env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_SHOW_SQL));
return properties;
}
@Bean
public JpaTransactionManager transactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
return transactionManager;
}
@Bean
public MainBean mainBean() {
return new MainBean();
}
}
Start class
开始上课
public class Start {
private static final String CONFIG_PACKAGE = "org.app.config";
public static void main(String[] args) {
try (AnnotationConfigApplicationContext ctx = new
AnnotationConfigApplicationContext()) {
ctx.scan(CONFIG_PACKAGE);
ctx.refresh();
MainBean bean = ctx.getBean(MainBean.class);
bean.start();
}
}
}
Main Bean
主豆
public class MainBean {
public void start() {
System.out.println("Application Started. . .");
}
}
However I'm getting the following exception
但是我收到以下异常
Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [C:\MyPath\target\classes\org\app\config\JpaConfiguration.class]; nested exception is java.lang.IllegalArgumentException
at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:281)
at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)
at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.scan(ClassPathBeanDefinitionScanner.java:220)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.scan(AnnotationConfigApplicationContext.java:153)
at org.app.Start.main(Start.java:25)
Caused by: java.lang.IllegalArgumentException
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:52)
at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:257)
... 4 more
Anyone have an idea what I'm doing wrong?
任何人都知道我做错了什么？
采纳答案by Oliver Drotbohm
The exception you see is not very likely to be cause by invalid Spring configuration but your classpath setup. This feels like a version incompatibility regarding the ASM libraries and Java 8. The ASM version, Spring 3.2 depends on is known to be incompatible with Java 8.
您看到的异常不太可能是由无效的 Spring 配置引起的，而是由您的类路径设置引起的。这感觉就像 ASM 库和 Java 8 的版本不兼容。已知 Spring 3.2 依赖的 ASM 版本与 Java 8 不兼容。
Thus, if you want run your code with Java 8, you need to use a recent Spring 4.0 version.
因此，如果要使用 Java 8 运行代码，则需要使用最新的 Spring 4.0 版本。
回答by Dheeraj Dhiman
I was also facing same issue with Spring-3.2.0 and Java 8 ( jdk1.8.0_60 ). After using 3.2.14 release of spring framework , it works.
我在 Spring-3.2.0 和 Java 8 ( jdk1.8.0_60 ) 上也遇到了同样的问题。使用 3.2.14 版本的 spring 框架后，它可以工作。
