spring

一.JDBCTemplate

导入的jar

//创建连接池

 DriverManagerDataSource dmd= new DriverManagerDataSource();

//往连接池里面设置4大参数

     dmd.setDriverClassName( "com.mysql.jdbc.Driver" );

     dmd.setUrl( "jdbc:mysql:///myspring03" );

     dmd.setUsername( "root" );

     dmd.setPassword( "root" );

      //创建jdbcTemplate模板

     JdbcTemplate template = new JdbcTemplate();

      //将连接池设置到模板中

     template.setDataSource(dmd);

=====================

    

    

    

    

 

 

     ref="ds3"/>

  -->

引入外部文件：

 

 

   

   

   

  

 

==============

==================

---

1.1.5Spring的事务管理:

声明事务管理在xml中的配置：（基于AOPxml的配置）

 

  < context:property-placeholder location = "classpath:db.properties" />

   

  < bean id = "dataSource" class = "com.mchange.v2.c3p0.ComboPooledDataSource" >

       < property name = "driverClass" value = "${jdbc.driver}" />

       < property name = "jdbcUrl" value = "${jdbc.url}" />

       < property name = "user" value = "${jdbc.user}" />

       < property name = "password" value = "${jdbc.password}" > property >

    bean >

  < bean id = "accountService" class = "cn.itcast.demo3.AccountServiceImpl" >

     < property name = "accountDao" ref = "accountDao" > property >

  bean >

 

  < bean id = "accountDao" class = "cn.itcast.demo3.AccountDaoImpl" >

   

    < property name = "dataSource" ref = "dataSource" > property >

  bean >

 

 

  < bean id = "transactionManager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" >

     

      < property name = "dataSource" ref = "dataSource" > property >

  bean >

 

 

  < tx:advice id = "txAdvice" transaction-manager = "transactionManager" >

   

     < tx:attributes >

          < tx:method name = "transf" />

     tx:attributes >

  tx:advice >

 

  < aop:config >

     < aop:pointcut expression = "execution(* cn.itcast.demo3.AccountService+.*(..))" id = "mypointcut" />

     < aop:advisor advice-ref = "txAdvice" pointcut-ref = "mypointcut" />

  aop:config >

 

步骤：

 1>导包 aop tx

 2>在xml中配置

•      配置数据源
•      声明目标类，持久层的类。并且在持久层中注入数据源，目的是Dao类继承JdbcDaoSupport。此类帮我们拿到模板，直接注入数据源即可
•      注册事务管理器。事务管理器中注入数据源！目的是获得连接，开启事务
•      定义增强。事务管理的  ：  事务里面的属性
•      定义Aop的设置

      

 

 

 

 

---

基于注解的事务管理:

第一步:事务管理器:

第二步 : 注解事务 :

 第三步: 在 Service 上使用注解

@Transactional

* 注解中有属性值:

* isolation

* propagation

* readOnly

=====================

 

  < context:property-placeholder location = "classpath:db.properties" />

   

  < bean id = "dataSource" class = "com.mchange.v2.c3p0.ComboPooledDataSource" >

       < property name = "driverClass" value = "${jdbc.driver}" />

       < property name = "jdbcUrl" value = "${jdbc.url}" />

       < property name = "user" value = "${jdbc.user}" />

       < property name = "password" value = "${jdbc.password}" > property >

    bean >

  < bean id = "accountService" class = "cn.itcast.demo4.AccountServiceImpl" >

     < property name = "accountDao" ref = "accountDao" > property >

  bean >

 

  < bean id = "accountDao" class = "cn.itcast.demo4.AccountDaoImpl" >

   

    < property name = "dataSource" ref = "dataSource" > property >

  bean >

 

 

  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >

     

      <property name="dataSource" ref="dataSource" >property>

  bean >

 

  <tx:annotation-driven transaction-manager="transactionManager" />  

在目标类上加上

@ Transactional

public class AccountServiceImpl implements AccountService {

---