通用DAO实施，注入失败@控制器级别 [英] Generic DAO implementation, Injection failure @ controller level
问题描述
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.Transient;
import org.apache.log4j.Logger;
import org.springframework.dao.DataAccessException;
/**
* Generic DAO implementation class that provides basic Data access and
* manipulation functionality
*
* @author syed.ammar
*
*/
public abstract class GenericDAOImpl<T> implements GenericDAO<T> {
private static Logger logger = Logger.getLogger(GenericDAOImpl.class);
@SuppressWarnings("unchecked")
protected Class<T> clazz = (Class<T>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[0];
@PersistenceContext
protected EntityManager entityManager;
public EntityManager getEntityManager() {
return entityManager;
}
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
@Override
public T save(T entity) throws DataAccessException {
logger.debug("Merging Object of Type: " + entity.getClass().getCanonicalName());
entity = entityManager.merge(entity);
return entity;
}
@Override
public void persist(T entity) throws DataAccessException {
logger.debug("Persisting Object of Type: " + entity.getClass().getCanonicalName());
entityManager.persist(entity);
}
/**
* This method update record in database
*
* @param updatableObj
* - the updated copy to merge
* @return the updated, registered persistent instance
* */
@Override
public T update(T entity) {
return save(entity);
}
/**
* Delete the given entity.
*
* @param entityClass
* - the entityClass to delete
* */
@Override
public void delete(T entity) {
logger.debug("Delete entity of Type: " + entity.getClass().getCanonicalName());
entityManager.remove(entity);
}
/**
* Delete all given entities.
*
* @param entities
* - the entities to delete
* */
public void deleteAll(List<T> entities) {
for (T entity : entities) {
delete(entity);
}
}
/**
* Delete Entity by Id
* @param id
* - Entity Id
*/
@Override
public int deleteById(Long id) {
Query deleteQuery = entityManager.createQuery("DELETE FROM " + clazz.getName() + " entity WHERE entity.id=:id");
deleteQuery.setParameter("id", id);
return deleteQuery.executeUpdate();
}
/**
* Delete Entity by Customer
* @param customer
* - Customer Entity
*/
/* @Override
public int deleteByCustomer(Customer customer) {
Query deleteQuery = entityManager.createQuery("DELETE FROM " + clazz.getName() + " entity WHERE entity.customer=:customer");
deleteQuery.setParameter("customer", customer);
return deleteQuery.executeUpdate();
}
*/
/**
* Delete Entity by Reseller
* @param reseller
* - Reseller Entity
*/
/* @Override
public int deleteByReseller(Reseller reseller) {
Query deleteQuery = entityManager.createQuery("DELETE FROM " + clazz.getName() + " entity WHERE entity.customer.reseller=:reseller");
deleteQuery.setParameter("reseller", reseller);
return deleteQuery.executeUpdate();
}
*/
/**
* Read the entity instance of the given class with the given id, throwing
* an exception if not found. Retrieves read-write objects from the
* hibernate UnitOfWork in case of a non-read-only transaction, and
* read-only objects else.
* @param id
* - Identity key of the desired object
* @return the entity instance
* */
@Override
public T getById(Long id) {
logger.debug("getById:" + id + ", T class: " + clazz );
return entityManager.find(clazz, id);
}
@Override
public List<T> getResultList(String jpql, Map<String, Object> queryParams) {
logger.debug("Query: " + jpql);
Query query = entityManager.createQuery(jpql.toString());
for(Map.Entry<String, Object> entry : queryParams.entrySet()){
query.setParameter(entry.getKey(), entry.getValue());
}
@SuppressWarnings("unchecked")
List<T> resultList = (List<T>) query.getResultList();
return resultList;
}
/**
* Generic search method without sort column and direction which searches
* the record depending upon property values set in the passed model bean.
* This method has been deprecated and will be removed soon. Create Query
* specific methods in related Entity DAO's instead.
*
* @param entity
* Entity with data set for criteria search
* @return List of searched model beans by applying the passed values of
* model bean as criteria
*/
@Override
@Deprecated
public List<T> search(T entity) {
return search(entity, null, null);
}
/**
* Generic search method which searches the record depending upon property
* values set in the passed model bean.
* This method has been deprecated and will be removed soon. Create Query
* specific methods in related Entity DAO's instead.
*
* @param entity
* Entity with data set for criteria search
* @param sortByColumn
* Name of column to be used for sorting result
* @param sortDirection
* 1: ASC 2:DESC
* @return List of searched model beans by applying the passed values of
* model bean as criteria
*/
@Override
@Deprecated
@SuppressWarnings("unchecked")
public List<T> search(T entity, String sortByColumn, Long sortDirection) {
List<Object> params = new ArrayList<Object>();
String query = "SELECT entity FROM " + clazz.getName() + " entity";
Field[] publicFields = entity.getClass().getDeclaredFields();
for (Field field : publicFields) {
field.setAccessible(true);
Object value = null;
try {
value = field.get(entity);
} catch (IllegalArgumentException e) {
logger.error("", e);
} catch (IllegalAccessException e) {
logger.error("", e);
}
if (value == null
|| Collection.class.isAssignableFrom(field.getType())
|| java.lang.reflect.Modifier.isStatic(field.getModifiers())
|| field.getAnnotation(Transient.class) != null) {
continue;
}
if (field.getType().equals(String.class)) {
if (query.contains("where")) {
query = query + " and " + field.getName() + " like ?"
+ params.size();
} else {
query = query + " where " + field.getName() + " like ?"
+ params.size();
}
params.add("%" + value.toString() + "%");
} else if (field.getType().equals(Date.class)) {
Date startDateTime = null;
Date endDateTime = null;
String startTime = DATE_FORMAT.format(value) + " 00:00:00";
String endTime = DATE_FORMAT.format(value) + " 23:59:59";
try {
startDateTime = DATE_TIME_FORMAT.parse(startTime);
endDateTime = DATE_TIME_FORMAT.parse(endTime);
} catch (ParseException e) {
logger.error("", e);
}
if (startDateTime == null || endDateTime == null) {
continue;
}
if (query.contains("where")) {
query = query + " and " + field.getName() + " between ?"
+ params.size() + " and ?" + (params.size() + 1);
} else {
query = query + " where " + field.getName() + " between ?"
+ params.size() + " and ?" + (params.size() + 1);
}
params.add(startDateTime);
params.add(endDateTime);
} else {
if (query.contains("where")) {
query = query + " and " + field.getName() + " = "
+ params.size();
} else {
query = query + " where " + field.getName() + " = ?"
+ params.size();
}
params.add(value);
}
}
Query queryObj = entityManager.createQuery(query);
// Check is sorting parameters are not not blank or null, apply sorting
// criteria
if (sortByColumn != null && sortDirection != null) {
if (sortDirection == 1L) {
query = query + " Order By " + sortByColumn + " ASC";
} else {
query = query + " Order By " + sortByColumn + " DESC";
}
if (params.size() > 0) {
for (int i = 0; i < params.size(); i++) {
queryObj.setParameter(i, params.get(i));
}
}
}
return queryObj.getResultList();
}
@Override
public List<T> getAll() {
return getAll(null, null);
}
@Override
public List<T> getAll(String sortByColumn, Long sortDirection) {
String query = "SELECT entity FROM " + clazz.getName() + " entity";
if (sortByColumn != null && sortDirection != null) {
if (sortDirection == 1L) {
query = query + " Order By " + sortByColumn + " ASC";
} else {
query = query + " Order By " + sortByColumn + " DESC";
}
}
@SuppressWarnings("unchecked")
List<T> resultList = (List<T>) entityManager.createQuery(query).getResultList();
return resultList;
}
/**
* Generic find method which identify the exact records depending upon
* property values set in the passed model bean else null will be returned
*
* @param entity
* Entity with data set for criteria search
* @return List of identified model beans by applying the passed values of
* model bean as criteria
*/
@Override
@SuppressWarnings("unchecked")
public List<T> find(T entity) {
List<Object> params = new ArrayList<Object>();
String query = "SELECT entity FROM " + entity.getClass().getName()
+ " entity";
Field[] publicFields = entity.getClass().getDeclaredFields();
for (Field field : publicFields) {
field.setAccessible(true);
Object value = null;
try {
value = field.get(entity);
} catch (IllegalArgumentException e) {
logger.error("", e);
} catch (IllegalAccessException e) {
logger.error("", e);
}
if (value == null
|| Collection.class.isAssignableFrom(field.getType())
|| java.lang.reflect.Modifier.isStatic(field.getModifiers())
|| field.getAnnotation(Transient.class) != null) {
continue;
}
if (field.getType().equals(Date.class)) {
Date startDateTime = null;
Date endDateTime = null;
String startTime = DATE_FORMAT.format(value) + " 00:00:00";
String endTime = DATE_FORMAT.format(value) + " 23:59:59";
try {
startDateTime = DATE_TIME_FORMAT.parse(startTime);
endDateTime = DATE_TIME_FORMAT.parse(endTime);
} catch (ParseException e) {
logger.error("", e);
}
if (startDateTime == null || endDateTime == null) {
continue;
}
if (query.contains("where")) {
query = query + " and " + field.getName() + " between ?"
+ params.size() + " and ?" + (params.size() + 1);
} else {
query = query + " where " + field.getName() + " between ?"
+ params.size() + " and ?" + (params.size() + 1);
}
params.add(startDateTime);
params.add(endDateTime);
} else {
if (query.contains("where")) {
query = query + " and " + field.getName() + " = ?"
+ params.size();
} else {
query = query + " where " + field.getName() + " = ?"
+ params.size();
}
params.add(value);
}
}
if (params.size() > 0) {
Query queryObj = entityManager.createQuery(query);
for (int i = 0; i < params.size(); i++) {
queryObj.setParameter(i, params.get(i));
}
return queryObj.getResultList();
} else {
return null;
}
}
}
///自动接线
@Controller
public class CourseController {
// @Autowired
// private SearchService searchService;
@Autowired
CourseDAOImp courseDAO;
//..............
}
严重:将上下文初始化事件发送给侦听器的异常类的实例org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.factory.BeanCreationException:错误创建名称为"courseController"的bean:自动接线的注入依赖项失败；嵌套的例外是org.springframework.beans.factory.BeanCreationException:无法自动连线栏位:com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImpcom.softech.ls360.lcms.contentbuilder.web.controller.CourseController.courseDAO;嵌套的例外是org.springframework.beans.factory.NoSuchBeanDefinitionException:否类型的匹配豆找到[com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp]依赖关系:至少需要1个符合自动装配条件的bean此依赖项的候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:291)在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)在org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)在org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)在org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)在org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)在org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)在org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)在org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)在org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)在org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)在org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)在org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)在org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)在org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:963)在org.apache.catalina.startup.HostConfig $ DeployWar.run(HostConfig.java:1600)在java.util.concurrent.Executors $ RunnableAdapter.call(Executors.java:471)在java.util.concurrent.FutureTask.run(FutureTask.java:262)在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)在java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:615)在java.lang.Thread.run(Thread.java:744)导致原因:org.springframework.beans.factory.BeanCreationException:无法自动连线栏位:com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImpcom.softech.ls360.lcms.contentbuilder.web.controller.CourseController.courseDAO;嵌套的例外是org.springframework.beans.factory.NoSuchBeanDefinitionException:否类型的匹配豆找到[com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp]依赖关系:至少需要1个符合自动装配条件的bean此依赖项的候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:502)在org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282)... 26更多原因:org.springframework.beans.factory.NoSuchBeanDefinitionException:否类型的匹配豆找到[com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp]依赖关系:至少需要1个符合自动装配条件的bean此依赖项的候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}在org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920)在org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789)在org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703)在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474)...另外28个
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'courseController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp com.softech.ls360.lcms.contentbuilder.web.controller.CourseController.courseDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:963) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1600) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp com.softech.ls360.lcms.contentbuilder.web.controller.CourseController.courseDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:502) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282) ... 26 more Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.softech.ls360.lcms.contentbuilder.dao.impl.CourseDAOImp] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474) ... 28 more
推荐答案
您没有使用名称"courseController"注册bean.首先将该类注册为bean.您在不注册courseController的情况下注入了该类.通过添加@ComponenetScan批注，您可以扫描所有bean，spring会注册它们.
You did not registered bean with name "courseController".First register that class as bean.You are injecting that without registering courseController. By adding @ComponenetScan annotation you can scan your all beans and spring will register them.
这篇关于通用DAO实施，注入失败@控制器级别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
