1:配置數據源,如:
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<beans xmlns= "http://www.springframework.org/schema/beans" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" xmlns:aop= "http://www.springframework.org/schema/aop" xmlns:context= "http://www.springframework.org/schema/context" xmlns:tx= "http://www.springframework.org/schema/tx" xsi:schemaLocation="http: //www.springframework.org/schema/beans http: //www.springframework.org/schema/beans/spring-beans-2.5.xsd http: //www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-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"> <!-- 配置數據源 --> <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" /> <!-- 連接池啓動時的初始值 --> <property name= "initialSize" value= "1" /> <!-- 連接池的最大值 --> <property name= "maxActive" value= "500" /> <!-- 最大空閒值.當經過一個高峯時間後,連接池可以慢慢將已經用不到的連接慢慢釋放一部分,一直減少到maxIdle爲止 --> <property name= "maxIdle" value= "2" /> <!-- 最小空閒值.當空閒的連接數少於閥值時,連接池就會預申請去一些連接,以免洪峯來時來不及申請 --> <property name= "minIdle" value= "1" /> </bean> </beans> |
這一步完成之後我們可以進行數據的增刪改查操作啦。
注意使用到的Jar包
寫實體bean, 以及servive 層, 然後再xml中配置bean 以及爲bean配置數據源;
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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; //通過DI將數據源注入給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:配置事務。配置事務時,需要在xml配置文件中引入用於聲明事務的tx命名空間,事務的配置方式有兩種:註解方式和基於XML配置方式。
在spring配置文件中引入用於聲明事務的tx命名空間
採用註解方式配置事務:
採用註解方式
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!– 採用@Transactional註解方式使用事務 -->
<tx:annotation-driven transaction-manager="txManager"/>
@Service @Transactional
public class PersonServiceBean implements PersonService {
}
採用基於XML方式配置事務
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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> |