java项目常用 BaseDao BaseService
IBaseDao
1
package
com.glht.sim.dao;
2
3
import
java.util.List;
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5
6
public
interface
IBaseDao
<
T
>
{
7
T get(
long
id);
8
void
create(T t);
9
void
delete(T t);
10
void
update(T t);
11
int
getTotalCount();
12
List
<
T
>
getPage(
int
startIndex,
int
count);
13
List
<
T
>
getAll();
14
}
BasoDao
1
package
com.glht.sim.dao.impl;
2
3
import
java.lang.reflect.ParameterizedType;
4
import
java.sql.SQLException;
5
import
java.util.List;
6
7
import
org.hibernate.HibernateException;
8
import
org.hibernate.Session;
9
import
org.springframework.orm.hibernate3.HibernateCallback;
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import
org.springframework.orm.hibernate3.support.HibernateDaoSupport;
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12
import
com.glht.sim.dao.IBaseDao;
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14
public
abstract
class
BaseDao
<
T
>
extends
HibernateDaoSupport
implements
IBaseDao
<
T
>
{
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protected
Class
<
T
>
entityClass;
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protected
String className;
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public
BaseDao(){
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entityClass
=
(Class
<
T
>
)((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[
0
];
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className
=
entityClass.getName();
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}
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public
T get(
long
id){
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return
(T)
this
.getHibernateTemplate().get(entityClass, id);
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}
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public
void
create(T t){
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this
.getHibernateTemplate().save(t);
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}
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public
void
delete(T t){
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this
.getHibernateTemplate().delete(t);
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}
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public
void
update(T t){
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this
.getHibernateTemplate().update(t);
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}
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34
public
int
getTotalCount(){
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Object obj
=
this
.getHibernateTemplate().execute(
new
HibernateCallback(){
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public
Object doInHibernate(Session session)
38
throws
HibernateException, SQLException{
39
40
return
session.createQuery(
"
select count(id) from
"
+
className).uniqueResult();
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}
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});
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return
(
int
)((Long)obj).longValue();
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}
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public
List
<
T
>
getPage(
int
startIndex,
int
count) {
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return
(List
<
T
>
)
this
.getHibernateTemplate().executeFind(
48
new
PageHibernateCallback(
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"
from
"
+
className
+
"
as c order by c.id desc
"
,startIndex,count));
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}
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public
List
<
T
>
getAll(){
53
return
(List
<
T
>
)
this
.getHibernateTemplate().find(
"
from
"
+
className
+
"
as c order by c.id desc
"
);
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}
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}
IBaseService
1
package
com.glht.sim.service;
2
3
import
java.util.List;
4
5
6
public
interface
IBaseService
<
T
>
{
7
T get(
long
id);
8
void
create(T obj);
9
10
void
delete(T obj);
11
void
update(T obj);
12
int
getTotalCount();
13
List
<
T
>
getPage(
int
startIndex,
int
count);
14
List
<
T
>
getAll();
15
}
1
package
com.glht.sim.service.impl;
2
3
import
java.util.List;
4
5
import
com.glht.sim.dao.IBaseDao;
6
import
com.glht.sim.service.IBaseService;
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8
public
abstract
class
BaseService
<
T
>
implements
IBaseService
<
T
>
{
9
protected
IBaseDao
<
T
>
dao;
10
11
public
T get(
long
id){
12
return
dao.get(id);
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}
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public
void
create(T obj){
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dao.create(obj);
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}
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public
void
delete(T obj){
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dao.delete(obj);
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}
22
public
void
update(T obj){
23
dao.update(obj);
24
}
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26
public
int
getTotalCount(){
27
return
dao.getTotalCount();
28
}
29
30
public
List
<
T
>
getPage(
int
startIndex,
int
count){
31
return
dao.getPage(startIndex,count);
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}
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34
public
List
<
T
>
getAll(){
35
return
dao.getAll();
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}
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public
void
setDao(IBaseDao
<
T
>
dao) {
39
this
.dao
=
dao;
40
}
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42
}