hibernate使用jpa对于基础dao的封装
2017-05-11 本文已影响271人
huangxiongbiao
一、dao的接口
package com.hm.dao;
import java.util.List;
import java.util.Map;
import com.hm.common.util.QueryParameter;
/**
* 数据操作基类接口
*/
public interface BaseDAO<T, PK extends java.io.Serializable> {
/**
* 保存对象
* @param entity 实体
* @return 1：操作成功 0：操作失败
*/
public int save(T entity);
/**
* 更新对象信息
* @param entity 实体
* @return 1：操作成功 0：操作失败
*/
public int update(T entity);
/**
* 删除对象
* @param entity 实体
* @return >0：操作成功
*/
public int delete(T entity );
/**
* 删除对象
* @param id 主键
* @return >0：操作成功
*/
public int delete(PK id);
/**
* 根据ID获取实体对象
* @param id ID主键
* @return 实体
*/
public T findById(PK id);
/**
* 根据EJB-QL查询对象
* @param queryString QL语句
* @return 数据集合
*/
public List<T> findByQL(String queryString);
/**
* 根据EJB-QL查询对象
* @param queryString QL语句
* @param map 参数
* @return 数据集合
*/
public List<T> findByQL(String queryString, Map<String, Object> map);
/**
* 根据SQL查询对象
* @param queryString SQL语句
* @return 数据集合
*/
public List<Object> findBySQL(String queryString);
/**
* 根据SQL查询对象
* @param queryString SQL语句
* @param map 参数
* @return 数据集合
*/
public List<Object> findBySQL(String queryString, Map<String, Object> map);
/**
* 根据EJB-QL返回对象记录数
* @param queryString EJ-QL语句
* @return 总记录数
*/
public int getCountByQL(String queryString);
/**
* 根据EJB-QL返回对象记录数
* @param queryString EJ-QL语句
* @param map 参数
* @return 总记录数
*/
public int getCountByQL(String queryString, Map<String, Object> map);
/**
* 根据SQL返回对象记录数
* @param queryString SQL语句
* @return 总记录数
*/
public int getCountBySQL(String queryString);
/**
* 根据SQL返回对象记录数
* @param queryString SQL语句
* @param map 参数
* @return 总记录数
*/
public int getCountBySQL(String queryString, Map<String, Object> map);
/**
* 根据SQL返回对象记录数
* @param queryString SQL语句
* @param map 参数
* @return 总记录数
*/
public int getCountBySQL2(String queryString, Map<String, Object> map);
/**
* 根据EJB-QL查询对象
* @param queryString QL语句
* @param maxSize 最大数量
* @param firstId 第一条记录
* @return 数据集合
*/
public List<T> findByQL(String queryString, int maxSize, int firstId);
/**
* 根据EJB-QL查询对象
* @param queryString QL语句
* @param maxSize 最大数量
* @param firstId 第一条记录
* @param map 参数
* @return 数据集合
*/
public List<T> findByQL(String queryString, int maxSize, int firstId, Map<String, Object> map);
/**
* 根据SQL查询对象
* @param queryString SQL语句
* @param maxSize 最大数量
* @param firstId 第一条记录
* @return 数据集合
*/
public List<Object> findBySQL(String queryString, int maxSize, int firstId);
/**
* 根据SQL查询对象
* @param queryString SQL语句
* @param maxSize 最大数量
* @param firstId 第一条记录
* @param map 参数
* @return 数据集合
*/
public List<Object> findBySQL(String queryString, int maxSize, int firstId, Map<String, Object> map);
/**
* 执行更新语句
* @param queryString EJ-QL语句
* @return 影响记录数
*/
public int executeUpdateByQL(String queryString);
/**
* 执行更新语句
* @param queryString EJ-QL语句
* @param map 参数
* @return 影响记录数
*/
public int executeUpdateByQL(String queryString, Map<String, Object> map);
/**
* 执行更新语句
* @param queryString SQL语句
* @return 影响记录数
*/
public int executeUpdateBySQL(String queryString);
/**
* 执行更新语句
* @param queryString SQL语句
* @param map 参数
* @return 影响记录数
*/
public int executeUpdateBySQL(String queryString, Map<String, Object> map);
/**
* 执行事务
* @param queryParameterList 要执行的QL语句集合
* @return 操作结果 true | false
*/
public boolean executeTransactionalByQL(List<QueryParameter> queryParameterList);
/**
* 执行事务
* @param queryParameterList 要执行的SQL语句集合
* @return 操作结果 true | false
*/
public boolean executeTransactionalBySQL(List<QueryParameter> queryParameterList);
/**
* 根据HQL查询对象
* @param queryString SQL语句
* @param maxSize 最大数量
* @param firstId 第一条记录
* @param map 参数
* @return 数据集合
*/
public List<Object> findObjectByQL(String queryString, int maxSize, int firstId, Map<String, Object> map);
}
二、dao的实现
package com.hm.dao.jpa;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceUnit;
import javax.persistence.Query;
import javax.transaction.Transactional;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.hm.common.util.QueryParameter;
import com.hm.dao.BaseDAO;
/**
* 数据操作基类实现类
*/
@SuppressWarnings("unchecked")
public class BaseDAOImpl<T, PK extends java.io.Serializable> implements BaseDAO<T, PK> {
private static Log log;
private Class<T> entityClass;
@PersistenceContext
private EntityManager entityManager;
// @PersistenceContext
private EntityManagerFactory entityManagerFactory;
@PersistenceUnit
public void setEntityManagerFactory(EntityManagerFactory emf) {
this.entityManagerFactory = emf;
}
/**
* 构造方法
*/
public BaseDAOImpl(Class<T> entityClass) {
this.entityClass = entityClass;
}
public Log getLog() {
if(null == log) {
log = LogFactory.getLog(this.getClass());
}
return log;
}
public EntityManager getEntityManager() {
return entityManager;
}
public Class<T> getEntityClass() {
return entityClass;
}
public void setEntityClass(Class<T> entityClass) {
this.entityClass = entityClass;
}
@Transactional
public int save(T entity) {
try {
entityManager.persist(entity);
} catch (Exception e) {
getLog().error("保存对象发生异常:" +e.getMessage());
return 0;
}
return 1;
}
@Transactional
public int update(T entity) {
try {
entity = entityManager.merge(entity);
} catch (Exception e) {
getLog().error("获取对象发生异常:"+e.getMessage());
return 0;
}
return 1;
}
@Transactional
public int delete(T entity) {
try {
entityManager.remove(entityManager.merge(entity));
return 1;
} catch (Exception e) {
getLog().error("删除对象发生异常:"+e.getMessage());
return 0;
}
}
@Transactional
public int delete(PK id) {
return this.delete(this.findById(id));
}
public T findById(PK id) {
T entity = null;
try {
entity = entityManager.find(entityClass, id);
} catch (Exception e) {
getLog().error("获取对象发生异常:"+e.getMessage());
}
return entity;
}
public List<T> findByQL(String queryString) {
List<T> rList = new ArrayList<T>();
try {
rList = (List<T>)entityManager.createQuery(queryString).getResultList();
} catch (Exception e) {
getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<T> findByQL(String queryString, Map<String, Object> map) {
List<T> rList = new ArrayList<T>();
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
rList = (List<T>)q.getResultList();
} catch (Exception e) {
getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<Object> findBySQL(String queryString) {
List<Object> rList = new ArrayList<Object>();
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<Object> findBySQL(String queryString, Map<String, Object> map) {
List<Object> rList = new ArrayList<Object>();
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<T> findByQL(String queryString, int maxSize, int firstId) {
List<T> rList = new ArrayList<T>();
try {
Query q = this.getEntityManager().createQuery(queryString);
q.setMaxResults(maxSize);
q.setFirstResult(firstId);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<T> findByQL(String queryString, int maxSize, int firstId, Map<String, Object> map) {
List<T> rList = new ArrayList<T>();
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
q.setMaxResults(maxSize);
q.setFirstResult(firstId);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
e.printStackTrace();
}
return rList;
}
public List<Object> findObjectByQL(String queryString, int maxSize, int firstId, Map<String, Object> map) {
List<Object> rList = new ArrayList<Object>();
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
q.setMaxResults(maxSize);
q.setFirstResult(firstId);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<Object> findBySQL(String queryString, int maxSize, int firstId) {
List<Object> rList = new ArrayList<Object>();
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
q.setMaxResults(maxSize);
q.setFirstResult(firstId);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public List<Object> findBySQL(String queryString, int maxSize, int firstId, Map<String, Object> map) {
List<Object> rList = new ArrayList<Object>();
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
q.setMaxResults(maxSize);
q.setFirstResult(firstId);
rList = q.getResultList();
} catch (Exception e) {
this.getLog().error("获取对象发生异常:"+e.getMessage());
}
return rList;
}
public int getCountByQL(String queryString) {
int intCount = 0;
try {
Query q = this.getEntityManager().createQuery(queryString);
intCount = ((Long)q.getSingleResult()).intValue();
} catch (Exception e) {
getLog().error("获取对象总数发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
public int getCountByQL(String queryString, Map<String, Object> map) {
int intCount = 0;
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
intCount = ((Long)q.getSingleResult()).intValue();
} catch (Exception e) {
getLog().error("获取对象总数发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
public int getCountBySQL(String queryString) {
int intCount = 0;
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
intCount = ((Integer)q.getSingleResult()).intValue();
} catch (Exception e) {
getLog().error("获取对象总数发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
public int getCountBySQL(String queryString, Map<String, Object> map) {
int intCount = 0;
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
intCount = ((Integer)q.getSingleResult()).intValue();
} catch (Exception e) {
getLog().error("获取对象总数发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
public int getCountBySQL2(String queryString, Map<String, Object> map) {
int intCount = 0;
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
String str = q.getSingleResult().toString();
intCount = Integer.parseInt(str);
} catch (Exception e) {
getLog().error("获取对象总数发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
@Transactional
public int executeUpdateByQL(String queryString) {
int intCount = 0;
try {
intCount = this.getEntityManager().createQuery(queryString).executeUpdate();
} catch (Exception e) {
getLog().error("执行更新语句发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
@Transactional
public int executeUpdateByQL(String queryString, Map<String, Object> map) {
int intCount = 0;
try {
Query q = this.getEntityManager().createQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
intCount = q.executeUpdate();
} catch (Exception e) {
getLog().error("执行更新语句发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
@Transactional
public int executeUpdateBySQL(String queryString) {
int intCount = 0;
try {
intCount = this.getEntityManager().createNativeQuery(queryString).executeUpdate();
} catch (Exception e) {
getLog().error("执行更新语句发生异常:"+e.getMessage());
}
return intCount;
}
@Transactional
public int executeUpdateBySQL(String queryString, Map<String, Object> map) {
int intCount = 0;
try {
Query q = this.getEntityManager().createNativeQuery(queryString);
if(null != map) {
for (String key : map.keySet()) {
q.setParameter(key, map.get(key));
}
}
intCount = q.executeUpdate();
} catch (Exception e) {
getLog().error("执行更新语句发生异常:"+e.getMessage());
e.printStackTrace();
}
return intCount;
}
@Override
public boolean executeTransactionalByQL(List<QueryParameter> queryParameterList) {
if(null == queryParameterList || queryParameterList.isEmpty()) {
return false;
}
EntityManager entityManager = entityManagerFactory.createEntityManager();
try {
//this.getEntityManager().getTransaction().begin();
entityManager.getTransaction().begin();
for(QueryParameter queryParameter : queryParameterList) {
//Query q = this.getEntityManager().createQuery(queryParameter.getQueryString());
Query q;
if(StringUtils.indexOf(queryParameter.getQueryString(), "insert") >= 0 || queryParameter.getType() == "SQL")
{
q = entityManager.createNativeQuery(queryParameter.getQueryString());
}
else
{
q = entityManager.createQuery(queryParameter.getQueryString());
}
if(null != queryParameter.getParameterMap()) {
for (String key : queryParameter.getParameterMap().keySet()) {
q.setParameter(key, queryParameter.getParameterMap().get(key));
}
}
q.executeUpdate();
}
//this.getEntityManager().getTransaction().commit();
entityManager.getTransaction().commit();
} catch (Exception e) {
getLog().error("执行事务发生异常:"+e.getMessage());
//this.getEntityManager().getTransaction().rollback();
entityManager.getTransaction().rollback();
e.printStackTrace();
return false;
} finally {
entityManager.close();
}
return true;
}
@Override
public boolean executeTransactionalBySQL(List<QueryParameter> queryParameterList) {
if(null == queryParameterList || queryParameterList.isEmpty()) {
return false;
}
EntityManager entityManager = entityManagerFactory.createEntityManager();
try {
//this.getEntityManager().getTransaction().begin();
entityManager.getTransaction().begin();
for(QueryParameter queryParameter : queryParameterList) {
//Query q = this.getEntityManager().createQuery(queryParameter.getQueryString());
Query q = entityManager.createNativeQuery(queryParameter.getQueryString());
if(null != queryParameter.getParameterMap()) {
for (String key : queryParameter.getParameterMap().keySet()) {
q.setParameter(key, queryParameter.getParameterMap().get(key));
}
}
q.executeUpdate();
}
//this.getEntityManager().getTransaction().commit();
entityManager.getTransaction().commit();
} catch (Exception e) {
getLog().error("执行事务发生异常:"+e.getMessage());
//this.getEntityManager().getTransaction().rollback();
entityManager.getTransaction().rollback();
e.printStackTrace();
return false;
} finally {
entityManager.close();
}
return true;
}
}
