Spring和Mybatis的整合

复习之前的事物
Properties

事务：

数据库四种隔离级别
1.读未提交 Read_Uncommitted
2.读已经提交 Read_committed
3.可重复读 Repeatable_read
4.串行化 Serializable

1.这三个jar包是必须有的

要想整合这两个模块就准备的材料

大配置中的头文件

<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis-spring</artifactId>
  <version>1.3.0</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-tx</artifactId>
  <version>4.1.3.RELEASE</version>
</dependency>

<dependency>  <groupId>org.mybatis</groupId>  <artifactId>mybatis</artifactId>  <version>3.2.8</version></dependency>

<!--01.识别jdbc.properties文件-->context<context:property-placeholder location="jdbc.properties"/>

<?xml version="1.0" encoding="UTF-8"?>        <beans xsi:schemaLocation=" http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx.xsd "          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xmlns:p="http://www.springframework.org/schema/p"         xmlns:tx="http://www.springframework.org/schema/tx"         xmlns:context="http://www.springframework.org/schema/context"         xmlns:aop="http://www.springframework.org/schema/aop"         xmlns="http://www.springframework.org/schema/beans">

<!--01.识别jdbc.properties文件-->    <context:property-placeholder location="jdbc.properties"/>    <!--02.阿里巴巴-->    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">    <property value="${jdbc.driverClassName}" name="driverClassName"/>    <property value="${jdbc.url}" name="url"/>    <property value="${jdbc.user}" name="username"/>    <property value="${jdbc.password}" name="password"/>

</bean>     <!--工厂配置-->        <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">            <property name="dataSource" ref="dataSource"></property>

<!--大配置路径-->            <property name="configLocation" value="classpath:MyBatis-config.xml"></property>        </bean><!--dao 实现类映射文件的扫描器可以在动态的内存中构建接口的实现类，代理对象-->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="cn.spring21.dao"></property>        <property name="sqlSessionFactoryBeanName" value="sessionFactory"></property>    </bean>

<!--service-->    <bean id="bookservice" class="cn.spring21.service.BookServiceImpl">        <property name="dao" ref="IBookDAO"></property>

</bean>    <!--事务管理器-->

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

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

</bean>

<!-- 第三种：AspectJ AOP 配置事务 -->

<tx:advice id="txAdvice" transaction-manager="transactionManager">    <tx:attributes>    <tx:method name="buy*" rollback-for="StockException" propagation="REQUIRED" isolation="DEFAULT"/></tx:attributes>

</tx:advice>

<aop:config>    <!--配置了切点Pointcut-->    <aop:pointcut id="mypoint" expression="execution(* *..service.*.*(..))"/>    <!--顾问-->    <aop:advisor pointcut-ref="mypoint" advice-ref="txAdvice"/>    </aop:config>

</beans>

<?xml version="1.0" encoding="UTF-8" ?>
<!--文档类型，头文件-->
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
别名方便我们编写代码
<typeAliases>

<package name="cn.spring21.entity"></package>
</typeAliases>

</configuration>

直接写这个项目上的实体类就能行

0.dao层 只有接口没有实现类

public interface IBookDAO {
    public int addBook(Book bok);
}

0.service层实现

public class BookServiceImpl implements IBookService {
    //植入dao 对象间的交互
    IBookDAO dao;

public int addBook(Book book) {
        return dao.addBook(book);
    }

public IBookDAO getDao() {
        return dao;
    }

public void setDao(IBookDAO dao) {
        this.dao = dao;
    }
}

jdbc的作用：可以连接数据库properties

0.jdbc.properties文件配置如下：为下面的大配置链接数据库的路径做了铺垫

jdbc.driverClassName=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql:///bookshop

jdbc.user=root

jdbc.password=1234

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
</bean>这里面引一道

<!--大配置路径-->

<property name="configLocation" value="classpath:MyBatis-config.xml"></property>

!--big config path-->

最后的三个注意点：

1.整合引入一个节点

Mybatis-spring 目的识别到（工厂SqlSessionFactoryBean和扫描器

MapperScannerConfigurer，都位于这个包下）

2.注意头文件，加上一个tx事务

3.注意pom.xml注意builder能自动的将src.main.java下的包中的配置文件编译到target目录

<build>
  <resources>
    <resource>
      <directory>src/main/java</directory>
      <includes>
        <include>**/*.*</include>
      </includes>
    </resource>
  </resources>
</build>