spring基础

1.spring注解

1.jar包

2. 配置文件

2. spring AOP切面编程

2.1 jar包

3. spring中的JdbcTemplate

　　jdbcTemplate是对原始的jdbc做了封装。

3.1 jar包

 3.2 基本操作

    public void test(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/db_jdbc?characterEncoding=utf-8");
        dataSource.setUsername("root");
        dataSource.setPassword("123");

        JdbcTemplate template = new JdbcTemplate();
        //进行操作
        template.execute("INSERT INTO tb_user () VALUES ()");
    }

 3.3 基于注解

bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                              http://www.springframework.org/schema/beans/spring-beans.xsd 
                              http://www.springframework.org/schema/context 
                              http://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="cn.getword" />
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/db_jdbc?characterEncoding=utf-8" />
        <property name="username" value="root" />
        <property name="password" value="123" />
    </bean>
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource" />
    </bean>

</beans>

 UserDaoImpl:

@Repository
public class UserDaoImpl implements UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    public List<User> save(){
        List<User> users = new ArrayList<User>();
        List<Map<String, Object>> maps =
                jdbcTemplate.queryForList("SELECT * FROM users ");
        for (Map<String, Object> map :
                maps) {
            User user = new User() {{
                setId((Integer) map.get("id"));
                setUsername((String) map.get("username"));
                setPassword((String) map.get("password"));
                setAge((Integer) map.get("age"));
                setRegisterTime((Date) map.get("registerTime"));
            }};
            users.add(user);
        }
        return users;
    }
}

4. spring的声明式事务控制【使用JdbcTemplate】

4.1 jar包

　　核心包+aop+事务相关

 4.2 xml配置方式

（1）配置JDBC事务类，交给spring管理

org.springframework.jdbc.datasource.DataSourceTransactionManager

<bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
          p:dataSource-ref="dataSource"/>

（2）配置切面

  <!--配置通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--配置通知方法,具体被增强的方法-->
        <tx:attributes>
            <tx:method name="save" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
        </tx:attributes>
    </tx:advice>
    <!--配置切面-->
    <aop:config>
        <!--切入点， 可能被增强的方法-->
        <aop:pointcut id="myPointCut" expression="execution(* cn.getword.service.impl.*.*(..))" />
        <!--配置增强和切入点的关系-->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="myPointCut" />
    </aop:config>

4.3  xml和注解组合配置

    <!-- JDBC事务管理器 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 启用支持annotation注解方式事务管理 -->
    <tx:annotation-driven transaction-manager="transactionManager"  proxy-target-class="true"/>

@Service
@Transactional(isolation = Isolation.DEFAULT, propagation = Propagation.REQUIRED, readOnly = false)
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;
}

end