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1》接口（主要是增删改查的接口）BaseDao.java
/**
*
* @author fly.zhou
*/
public interface IBaseDao {
//增加对应实体的一条记录
public boolean save(Object o);
//更新对应实体的一条记录
public boolean update(Object o);
//增加或者更新对应实体的一条记录
public boolean saveOrUpdate(Object o);
//保存一系列对象集合
public boolean saveOrUpdateAll(Collection l);
//删除对应实体的一条记录
public boolean delete(Object o);
//根据id删除对应实体的一条记录
public boolean delete(Class c, Serializable id);
//执行hql语句删除一条记录
public Integer delete(String hql, Object... values);
//删除一系列数据
public boolean deleteAll(Collection l);
//执行hql语句查找
public List find(String hql);
//分页查询，多参数条件
public List find(String hql, DataGridReq dgr, List values);
//分页查询，多参数条件
public List find(String hql, DataGridReq dgr, Object... values);
//不带分页查询，多参数条件
public List find(String hql, Object... values);
//不带分页查询，多参数条件
public boolean update(String hql, Object... values);
//根据主键ID查询对应实体的一条记录
public Object get(Class clazz, Serializable id);
//获取某实体对象
public Object load(Class c, Serializable id);
//获取总记录数
public Long total(String hql, List values);
//获取总记录数
public Long total(String hql, Object... values);
//更新对应实体的某一条记录
public boolean updateOneByProperty(Class clazz, Serializable id, String pName, Object pValue);
//更新对应实体的某几条记录
public boolean updateOneByPropertys(Class clazz, Serializable id, List<String> pName, List<Object> pValue);
//更新对应实体的某几条记录(封装成map)
public boolean updateOneByPropertys(Class clazz, Serializable id, Map<String, Object> map);
//根据属性名以及对应的属性值查找一条记录
public Object getSingleByProperty(Class clazz, String pName, Object pValue);
//判断是否有对应的属性名和属性值存在，存在返回true
public boolean ifHasOneByProperty(Class clazz, String pName, Object pValue);
//根据一系列属性以及对应的属性值查询一条记录
public Object getSingleByPropertys(Class clazz, List<String> pName, List<Object> pValue);
//判断是否有一系列对应的属性名和属性值存在，存在返回true
public boolean ifHasOneByPropertys(Class clazz, List<String> pName, List<Object> pValue);
//根据一系列属性以及对应的属性值(封装成Map)查询一条记录
public Object getSingleByPropertys(Class clazz, Map<String, Object> map);
//判断是否有一系列对应的属性名和属性值(封装成Map)存在，存在返回true
public boolean ifHasOneByPropertys(Class clazz, Map<String, Object> map);
//通过某一对应的属性名和属性值，查询某一个属性的值
public Object getValueByPropertys(Class clazz, Map<String, Object> map, String selectName);
//通过一系列对应的属性名和属性值，查询某一个属性的值
public Object getValueByProperty(Class clazz, String pName, Object pValue, String selectName);
//通过一系列对应的属性名和属性值，查询某一个属性的值
public Object getValueByPropertys(Class clazz, List<String> pNames, List<Object> pValues, String selectName);
//查询对应实体的所有记录
public List<Object> getObjects(Class clazz);
//查询符合属性名以及对应的属性值的一系列记录
public List<Object> getObjectsByProperty(Class clazz, String pName, Object pValue);
//根据任意属性查询名以及对应的属性值的一系列记录
public List<Object> getObjectsByAnyProperty(Class clazz, List<String> pName, List<Object> pValue);
//查询符合一系列属性名以及对应的属性值的一系列记录
public List<Object> getObjectsByPropertys(Class clazz, List<String> pName, List<Object> pValue);
//根据某属性对应的属性值在某一范围内的一系列记录
public List<Object> getObjectsByProperty(Class clazz, String pName, String operator, Object pValue);
//根据某属性对应的属性值在某一范围内的一系列记录
public List<Object> getObjectsByPropertys(Class clazz, List<String> pName, List<String> operator, List<Object> pValue);
}
2》接口的实现 BaseDaoImpl.java
public class BaseDaoImpl implements IBaseDao {
private static final Logger logger = Logger.getLogger(BaseDaoImpl.class);
private HibernateTemplate hibernateTemplate;
public HibernateTemplate getHibernateTemplate() {
hibernateTemplate.setCacheQueries(true);// 开启二级查询缓存
return hibernateTemplate;
}
@Autowired
public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
this.hibernateTemplate = hibernateTemplate;
}
@Override
public boolean delete(Object o) {
// logger.info("删除");
try {
this.getHibernateTemplate().delete(o);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public boolean delete(Class c, Serializable id) {
// logger.info("删除");
try {
this.getHibernateTemplate().delete(get(c, id));
return true;
} catch (Exception e) {
return false;
}
}
@Override
public Integer delete(final String hql, final Object... values) {
return this.getHibernateTemplate().execute(new HibernateCallback<Integer>() {
@Override
public Integer doInHibernate(Session session) throws HibernateException, SQLException {
Query q = session.createQuery(hql);
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
q.setParameter(i, values[i]);
}
}
return q.executeUpdate();
}
});
}
@Override
public boolean deleteAll(Collection l) {
// logger.info("删除");
try {
this.getHibernateTemplate().deleteAll(l);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public boolean update(Object o) {
// logger.info("更新");
try {
this.getHibernateTemplate().update(o);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
@Override
public boolean save(Object o) {
// logger.info("保存");
try {
this.getHibernateTemplate().save(o);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public boolean saveOrUpdate(Object o) {
try {
this.getHibernateTemplate().saveOrUpdate(o);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public boolean saveOrUpdateAll(Collection l) {
// logger.info("编辑");
try {
this.getHibernateTemplate().saveOrUpdateAll(l);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public List find(String hql) {
// logger.info("查询");
return this.getHibernateTemplate().find(hql);
}
@Override
public List find(final String hql, final DataGridReq dgr, final List values) {
return this.getHibernateTemplate().execute(new HibernateCallback<List>() {
@Override
public List doInHibernate(Session session) throws HibernateException, SQLException {
Query q = session.createQuery(hql);
if (values != null && values.size() > 0) {
for (int i = 0; i < values.size(); i++) {
q.setParameter(i, values.get(i));
}
}
if (dgr == null) {
return q.list();
}
return q.setFirstResult(dgr.getStart()).setMaxResults(dgr.getLimit() * dgr.getPage()).list();
}
});
}
@Override
public List find(final String hql, final DataGridReq dgr, final Object... values) {
return this.getHibernateTemplate().execute(new HibernateCallback<List>() {
@Override
public List doInHibernate(Session session) throws HibernateException, SQLException {
Query q = session.createQuery(hql);
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
q.setParameter(i, values[i]);
}
}
if (dgr == null) {
return q.list();
}
return q.setFirstResult(dgr.getStart()).setMaxResults(dgr.getLimit() * dgr.getPage()).list();
}
});
}
@Override
public List find(String hql, Object... values) {
return this.getHibernateTemplate().find(hql, values);
}
@Override
public boolean update(final String hql, final Object... values) {
try {
this.getHibernateTemplate().bulkUpdate(hql, values);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public Object get(Class c, Serializable id) {
return this.getHibernateTemplate().get(c, id);
}
@Override
public Object load(Class c, Serializable id) {
return this.getHibernateTemplate().load(c, id);
}
@Override
public Long total(final String hql, final List values) {
return this.getHibernateTemplate().execute(new HibernateCallback<Long>() {
@Override
public Long doInHibernate(Session session) throws HibernateException, SQLException {
Query q = session.createQuery(hql);
if (values != null && values.size() > 0) {
for (int i = 0; i < values.size(); i++) {
q.setParameter(i, values.get(i));
}
}
return (Long) q.uniqueResult();
}
});
}
@Override
public Long total(final String hql, final Object... values) {
return this.getHibernateTemplate().execute(new HibernateCallback<Long>() {
@Override
public Long doInHibernate(Session session) throws HibernateException, SQLException {
Query q = session.createQuery(hql);
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
q.setParameter(i, values[i]);
}
}
return (Long) q.uniqueResult();
}
});
}
@Override
public boolean updateOneByProperty(Class clazz, Serializable id, String pName, Object pValue) {
String hql = "update " + clazz.getName() + " entity set entity." + pName + " = ‘" + pValue + "‘ where entity.id = " + id;
getHibernateTemplate().bulkUpdate(hql);
return true;
}
@Override
public boolean updateOneByPropertys(Class clazz, Serializable id, List<String> pName, List<Object> pValue) {
String hql = "update " + clazz.getName() + " entity set entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " = ‘" + pValue.get(i) + "‘, entity.";
}
hql += pName.get(maxIndex) + " = ‘" + pValue.get(maxIndex) + "‘where entity.id = " + id;
System.out.println(hql);
getHibernateTemplate().bulkUpdate(hql);
return true;
}
@Override
public boolean updateOneByPropertys(Class clazz, Serializable id, Map<String, Object> map) {
String hql = "update " + clazz.getName() + " entity set entity.";
Set set = map.entrySet();
if (set != null) {
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
hql += key + " = ‘" + value + "‘ and entity.";
}
}
hql = hql.substring(0, hql.length() - 12);
hql += "‘where entity.id = " + id;
System.out.println(hql);
getHibernateTemplate().bulkUpdate(hql);
return true;
}
/**
* 根据属性查询
*
* @param clazz
* @param pName
* @param pValue
* @return
*/
@Override
public Object getSingleByProperty(Class clazz, String pName, Object pValue) {
String hql = "from " + clazz.getName() + " entity where entity." + pName + " = ‘" + pValue + "‘";
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return os.get(0);
} else {
return null;
}
}
/**
* 根据属性查询
*
* @param clazz
* @param pName
* @param pValue
* @return
*/
@Override
public boolean ifHasOneByProperty(Class clazz, String pName, Object pValue) {
String hql = "from " + clazz.getName() + " entity where entity." + pName + " = ‘" + pValue + "‘";
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return true;
} else {
return false;
}
}
/**
* 根据属性查询
*
* @param clazz
* @param pName
* @param pValue
* @return
*/
@Override
public List<Object> getObjectsByAnyProperty(Class clazz, List<String> pName, List<Object> pValue) {
String hql = "from " + clazz.getName() + " entity where entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " = ‘" + pValue.get(i) + "‘ or entity.";
}
hql += pName.get(maxIndex) + " = ‘" + pValue.get(maxIndex) + "‘";
System.out.println(hql);
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return os;
} else {
return null;
}
}
@Override
public boolean ifHasOneByPropertys(Class clazz, List<String> pName, List<Object> pValue) {
String hql = "from " + clazz.getName() + " entity where entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " = ‘" + pValue.get(i) + "‘ and entity.";
}
hql += pName.get(maxIndex) + " = ‘" + pValue.get(maxIndex) + "‘";
System.out.println(hql);
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return true;
} else {
return false;
}
}
@Override
public Object getSingleByPropertys(Class clazz, List<String> pName, List<Object> pValue) {
String hql = "from " + clazz.getName() + " entity where entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " = ‘" + pValue.get(i) + "‘ and entity.";
}
hql += pName.get(maxIndex) + " = ‘" + pValue.get(maxIndex) + "‘";
System.out.println(hql);
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return os.get(0);
} else {
return null;
}
}
@Override
public Object getSingleByPropertys(Class clazz, Map<String, Object> map) {
String hql = "from " + clazz.getName() + " entity where entity.";
Set set = map.entrySet();
if (set != null) {
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
hql += key + " = ‘" + value + "‘ and entity.";
}
}
hql = hql.substring(0, hql.length() - 12);
System.out.println("hql = " + hql);
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return os.get(0);
} else {
return null;
}
}
@Override
public boolean ifHasOneByPropertys(Class clazz, Map<String, Object> map) {
String hql = "from " + clazz.getName() + " entity where entity.";
Set set = map.entrySet();
if (set != null) {
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
hql += key + " = ‘" + value + "‘ and entity.";
}
}
hql = hql.substring(0, hql.length() - 12);
List<Object> os = getHibernateTemplate().find(hql);
if (os != null && !os.isEmpty()) {
return true;
} else {
return false;
}
}
/**
* 查询所有
*/
@Override
public List<Object> getObjects(Class clazz) {
String hql = "from " + clazz.getName();
List list = getHibernateTemplate().find(hql);
return list;
}
/**
* 根据属性查询 全部
*
* @param clazz
* @param pName
* @param pValue
* @return
*/
@Override
public List<Object> getObjectsByProperty(Class clazz, String pName, Object pValue) {
String hql = "from " + clazz.getName() + " entity where entity." + pName + " = ‘" + pValue + "‘";
return getHibernateTemplate().find(hql);
}
@Override
public List<Object> getObjectsByPropertys(Class clazz, List<String> pName, List<Object> pValue) {
String hql = "from " + clazz.getName() + " entity where entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " = ‘" + pValue.get(i) + "‘ and ";
}
hql += pName.get(maxIndex) + " = ‘" + pValue.get(maxIndex) + "‘";
return getHibernateTemplate().find(hql);
}
/**
* 根据属性查询 全部
*
* @param clazz
* @param pName
* @param pValue
* @return
*/
@Override
public List<Object> getObjectsByProperty(Class clazz, String pName, String operator, Object pValue) {
String hql = "from " + clazz.getName() + " entity where entity." + pName + " " + operator + pValue;
return getHibernateTemplate().find(hql);
}
@Override
public List<Object> getObjectsByPropertys(Class clazz, List<String> pName, List<String> operator, List<Object> pValue) {
String hql = "from " + clazz.getName() + " entity where entity.";
int maxIndex = pName.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pName.get(i) + " " + operator.get(i) + " ‘" + pValue.get(i) + "‘ and ";
}
hql += pName.get(maxIndex) + " " + operator.get(maxIndex) + " ‘" + pValue.get(maxIndex) + "‘";
System.out.println("hql = " + hql);
return getHibernateTemplate().find(hql);
}
@Override
public Object getValueByPropertys(Class clazz, Map<String, Object> map, String selectName) {
String hql = "select entity." + selectName + "from " + clazz.getName() + " entity where entity.";
Set set = map.entrySet();
if (set != null) {
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
hql += key + " = ‘" + value + "‘ and entity.";
}
}
hql = hql.substring(0, hql.length() - 12);
System.out.println("hql = " + hql);
return getHibernateTemplate().find(hql);
}
@Override
public Object getValueByProperty(Class clazz, String pName, Object pValue, String selectName) {
String hql = "select entity." + selectName + " from " + clazz.getName() + " entity where entity." + pName + " = ‘" + pValue + "‘";
System.out.println("hql = " + hql);
return getHibernateTemplate().find(hql);
}
@Override
public Object getValueByPropertys(Class clazz, List<String> pNames, List<Object> pValues, String selectName) {
String hql = "select entity." + selectName + "from " + clazz.getName() + " entity where entity.";
int maxIndex = pNames.size() - 1;
for (int i = 0; i < maxIndex; i++) {
hql += pNames.get(i) + " = ‘" + pValues.get(i) + "‘ and ";
}
hql += pNames.get(maxIndex) + " = ‘" + pValues.get(maxIndex) + "‘";
System.out.println("hql = " + hql);
return getHibernateTemplate().find(hql);
}
}
3》值得注意的地方Map如何获取key
Set set = map.entrySet();
if (set != null) {
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
hql += key + " = ‘" + value + "‘ and entity.";
}
}
4》这样写的话 会对项目省去大量的重复代码，在对具体的实体操作时，我们只需要把对应实体的实现继承BaseDaoImpl。
public class XXXDaoImpl extends BaseDaoImpl implements IXXXDao{}
当然我们也可以在XXXDaoImpl里面添加此实体特殊的实现方法。
5》对于hibernate，有时候为了提高查询和执行效率，我们只需要获取部分数据，而不需要拿出关联数据或者是整行的所有数据，这时候我们可以构造函数来解决这个问题。
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原文地址：http://www.cnblogs.com/doudou618/p/4323519.html
