1:配置数据源,如:
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<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;
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<bean class = "cn.gbx.service.impl.PersonServiceImpl"
id= "personServiceImpl" > <property name= "dataSource"
ref = "dataSource" ></property> </bean> |
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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:
<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
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<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> |
原文:http://www.cnblogs.com/E-star/p/3561653.html