[英]DataSource must not be null
My application doesnt use persistence.xml. 我的应用程序不使用persistence.xml。 So I tried using LocalContainerEntityManagerFactoryBean to create a custom EntityManager. 所以我尝试使用LocalContainerEntityManagerFactoryBean来创建自定义EntityManager。 But I get error as DataSource must not be null. 但我得到错误,因为DataSource不能为null。 Can anyone help on this issue? 有人可以帮忙解决这个问题吗?
PersistenceJPAConfig.java PersistenceJPAConfig.java
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories
public class PersistenceJPAConfig {
@Autowired
private DataSource dataSource;
@Autowired
JpaVendorAdapter jpaVendorAdapter;
@Bean(name = "personEntityManager")
public EntityManager entityManager() {
return entityManagerFactory().createEntityManager();
}
@Bean(name = "personEntityManagerFactory")
public EntityManagerFactory entityManagerFactory() {
LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
lef.setDataSource(dataSource);
lef.setJpaVendorAdapter(jpaVendorAdapter);
lef.setPackagesToScan("com.myc.cc.domain.Person");
lef.setPersistenceUnitName("personPersistenceUnit");
lef.afterPropertiesSet();
return lef.getObject();
}
@Primary
@Bean(name = "personTransactionManager")
public PlatformTransactionManager transactionManager() {
return new JpaTransactionManager(entityManagerFactory());
}
}
SearchPersonPredicates.java SearchPersonPredicates.java
public static Predicate findIdByEM(final Long pId) {
PersistenceJPAConfig jpaConfig = new PersistenceJPAConfig();
EntityManager manager= jpaConfig.entityManager();
QPerson qPerson = QPerson.person;
QAddress qAddress = QAddress.address;
BooleanBuilder booleanBuilder = new BooleanBuilder();
JPAQuery jpaQuery = new JPAQuery(manager);
JPASubQuery subQuery = new JPASubQuery();
Predicate predicate;
if (pId != null) {
booleanBuilder.or(QAddress.person_no.eq(pId));
}
predicate = booleanBuilder.getValue();
jpaQuery = jpaQuery.from(qAddress).join(qPerson).on(predicate);
subQuery.from(qPerson, qAddress);
return predicate;
}
SearchPersonServiceImpl.java SearchPersonServiceImpl.java
public List<Person> findPnumberbyEM(Long id) {
Iterable<Person> person = personRepository.findAll(findIdByEM(id));
return constructList(person);
}
private List<Person> constructList(Iterable<Person> persons) {
List<Person> list = new ArrayList<Person>();
for (Person person : persons) {
list.add(person);
}
}
Error 错误
17:52:35.337 ERROR 7016 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[.[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [/cc_dev] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: DataSource must not be null] with root cause
java.lang.IllegalArgumentException: DataSource must not be null
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.jdbc.datasource.lookup.SingleDataSourceLookup.<init>(SingleDataSourceLookup.java:40)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.setDataSource(LocalContainerEntityManagerFactoryBean.java:238)
at com.myc.cc.repository.PersistenceJPAConfig.entityManagerFactory(PersistenceJPAConfig.java:43)
at com.myc.cc.repository.PersistenceJPAConfig.entityManager(PersistenceJPAConfig.java:37)
at com.myc.cc.repository.SearchPersonPredicates.findIdByEM(SearchPersonPredicates.java:121)
at com.myc.cc.service.impl.SearchPersonServiceImpl.findPnumberbyEM(SearchPersonServiceImpl.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:201)
at com.sun.proxy.$Proxy114.findPnumberbyEM(Unknown Source)
at com.myc.cc.web.SearchPersonController.searchPerson(SearchPersonController.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
Thanks in advance 提前致谢
Your datasource
property may not be getting initialized. 您的datasource
属性可能未初始化。 Try adding @Value
to datasource
property: 尝试将@Value
添加到datasource
属性:
@Autowired
@Value("${property.reference}")
private DataSource dataSource;
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