1:配置数据源,如:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
<beans xmlns= "http://www.springframework.org/schema/beans"
xsi:schemaLocation="http: //www.springframework.org/schema/beans
http: //www.springframework.org/schema/beans/spring-beans-2.5.xsd
http: //www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http: //www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<!-- 配置数据源 -->
<bean id= "dataSource"
class = "org.apache.commons.dbcp.BasicDataSource"
destroy-method= "close" >
<property name= "driverClassName"
value= "org.gjt.mm.mysql.Driver" />
<property name= "url"
value= "jdbc:mysql://localhost:3306/itcast?useUnicode=true&characterEncoding=UTF-8" />
<property name= "username"
value= "root" />
<property name= "password"
value= "1" />
<!-- 连接池启动时的初始值 -->
<property name= "initialSize"
value= "1" />
<!-- 连接池的最大值 -->
<property name= "maxActive"
value= "500" />
<!-- 最大空闲值.当经过一个高峰时间后,连接池可以慢慢将已经用不到的连接慢慢释放一部分,一直减少到maxIdle为止 -->
<property name= "maxIdle"
value= "2" />
<!-- 最小空闲值.当空闲的连接数少于阀值时,连接池就会预申请去一些连接,以免洪峰来时来不及申请 -->
<property name= "minIdle"
value= "1" />
</bean>
</beans> |
这一步完成之后我们可以进行数据的增删改查操作啦。
注意使用到的Jar包
写实体bean, 以及servive 层, 然后再xml中配置bean 以及为bean配置数据源;
1
2
3
|
<bean class = "cn.gbx.service.impl.PersonServiceImpl"
id= "personServiceImpl" >
<property name= "dataSource"
ref = "dataSource" ></property>
</bean>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
package cn.gbx.service.impl; import java.util.List; import javax.sql.DataSource; import org.springframework.jdbc.core.JdbcTemplate; import cn.gbx.bean.Person; import cn.gbx.service.IPersonService; <br>@Transactional public
class PersonServiceImpl implements IPersonService {
private
JdbcTemplate jdbcTemplate;
//通过DI将数据源注入给jdbcTemplate
public
void setDataSource(DataSource dataSource) {
this .jdbcTemplate = new
JdbcTemplate(dataSource);
}
@Override
public
void save(Person person) {
jdbcTemplate.update( "insert into t_person(name) values(?)" , new
Object[] {person.getName()}, new
int [] {java.sql.Types.VARCHAR});
}
@Override
public
void delte(Person person) {
jdbcTemplate.update( "delete from t_person where id = ?" , new
Object[] {person.getId()}, new
int [] {java.sql.Types.INTEGER});
}
@Override
public
void update(Person person) {
jdbcTemplate.update( "update t_person set name = ? where id = ?" , new
Object[] {person.getName(), person.getId()},
new
int []{java.sql.Types.VARCHAR, java.sql.Types.VARCHAR}
);
}
@Override
public
Person getPerson(Integer personid) {
Person person = (Person)jdbcTemplate.queryForObject( "select * from t_person where id = ?" , new
Object[] {personid},
new
int [] {java.sql.Types.INTEGER} , new
PersonHandler());
return
person;
}
@Override
public
List<Person> getPersons() {
List<Person> persons = null ;
persons = jdbcTemplate.query( "select * from t_person" , new
PersonHandler());
return
persons;
}
} |
2:配置事务。配置事务时,需要在xml配置文件中引入用于声明事务的tx命名空间,事务的配置方式有两种:注解方式和基于XML配置方式。
在spring配置文件中引入用于声明事务的tx命名空间
采用注解方式配置事务:
采用注解方式
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!– 采用@Transactional注解方式使用事务 -->
<tx:annotation-driven transaction-manager="txManager"/>
@Service @Transactional
public class PersonServiceBean implements PersonService {
}
采用基于XML方式配置事务
1
2
3
4
5
6
7
8
9
10
11
12
13
|
<bean id= "txManager"
class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" >
<property name= "dataSource"
ref = "dataSource" />
</bean> <aop:config> <aop:pointcut id= "transactionPointcut"
expression= "execution(* cn.itcast.service..*.*(..))" />
<aop:advisor advice- ref = "txAdvice"
pointcut- ref = "transactionPointcut" />
</aop:config> <tx:advice id= "txAdvice"
transaction-manager= "txManager" >
<tx:attributes>
<tx:method name= "get*"
read-only= "true"
propagation= "NOT_SUPPORTED" />
<tx:method name= "*" />
</tx:attributes>
</tx:advice> |