Spring JDBC使用步骤和事务管理

<dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-jdbc</artifactId>
     <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>8.0.27</version>
</dependency>

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
    <property name="url" value="jdbc:mysql://localhost:3306/test"></property>
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource"></property>
</bean>

public class EmployeeDao {
    private JdbcTemplate jdbcTemplate;
	//数据查询方法
    public Employee findById(Integer eno){
        String sql="select * from employee where eno = ?";
        Employee employee = jdbcTemplate.queryForObject(sql,new Object[]{eno},new BeanPropertyRowMapper<>(Employee.class));
        return employee;
    }
    public JdbcTemplate getJdbcTemplate() {
        return jdbcTemplate;
    }
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
}

<bean id="employeeDao" class="spring.jdbc.dao.EmployeeDao">
    <property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>

public List<Employee> findByDname(String dname){
    String sql = "select * from employee where dname = ?";
    List<Employee> list = jdbcTemplate.query(sql,new Object[]{dname},new BeanPropertyRowMapper<>(Employee.class));
    return list;
}
public List<Map<String, Object>> findMapByDname(String dname){
    String sql = "select eno as  empno,salary as s from employee where dname = ?";
    List<Map<String, Object>> maps = jdbcTemplate.queryForList(sql, new Object[]{dname});
    return maps;
}

public void insert(Employee employee){
        String sql = "insert into employee(eno,ename,salary,dname) values(?,?,?,?)";
        //利用update方法实现数据写入操作
        jdbcTemplate.update(sql,new Object[]{
                employee.getEno(),employee.getEname(),employee.getSalary(), employee.getDname()
        });
    }
    public int update(Employee employee){
        String sql = "update employee set ename=?,salary=?,dname=? where eno=?";
        //利用update方法实现数据更新操作
        int count = jdbcTemplate.update(sql,new Object[]{
                employee.getEname(),employee.getSalary(), employee.getDname(),employee.getEno()
        });
        return count;
    }
    public int delete(Integer eno){
        String sql = "delete from employee where eno = ?";
        //利用update方法实现数据删除操作
        return jdbcTemplate.update(sql,new Object[]{eno});
    }

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

private DataSourceTransactionManager transactionManager;
	public DataSourceTransactionManager getTransactionManager() {
        return transactionManager;
    }
    public void setTransactionManager(DataSourceTransactionManager transactionManager) {
        this.transactionManager = transactionManager;
    }

<bean id="employeeService" class="spring.jdbc.service.EmployeeService">
        <property name="employeeDao" ref="employeeDao"></property>
        <property name="transactionManager" ref="transactionManager"></property>
</bean>

<dependency>
     <groupId>org.aspectj</groupId>
     <artifactId>aspectjweaver</artifactId>
     <version>1.9.5</version>
</dependency>

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

<!--事务通知配置，决定哪些方法使用事务，哪些方法不使用事务-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
			<!--propagation事务传播行为-->
			<!--当目标方法名为batchImport时，启用声明式事务，运行成功提交事务，运行时异常回滚-->
			<!--目标方法允许使用通配符*-->
            <tx:method name="batchImport" propagation="REQUIRED"/>
            <!--设置所有findXXX方法不启用事务-->
            <tx:method name="find*" propagation="NOT_SUPPORTED" read-only="true"/>
            <tx:method name="get*" propagation="NOT_SUPPORTED" read-only="true"/>
            <!--设置其他方法不启用事务-->
            <tx:method name="*" propagation="NOT_SUPPORTED" read-only="true"/>
        </tx:attributes>
    </tx:advice>

<!--定义声明式事务的作用范围-->
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* spring.jdbc..*Service.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
    </aop:config>

<context:component-scan base-package="spring.jdbc"/>
    <!--数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/test"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--启用注解形式声明式事务-->
    <tx:annotation-driven transaction-manager="transactionManager"/>

@Repository
public class EmployeeDao {
    @Resource
    private JdbcTemplate jdbcTemplate;
    ...

@Service
public class EmployeeService {
    @Resource
    private EmployeeDao employeeDao;
    ...