spring + mybatis 整合

1.先说说依赖类库

 <dependencies>
 <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
           <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-expression</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${spring-version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring-version}</version>
            </dependency>

            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>

            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
            </dependency>
 </dependencies>

maven 3.x profiles配置<profiles>    <profile>        <id>dev</id>        <properties>            <spring-version>3.1.1.RELEASE</spring-version>        </properties>    </profile>

    <profile>        <id>pro</id>        <properties>            <spring-version>3.1.1.RELEASE</spring-version>        </properties>    </profile></profiles>

这里特别注意spring的版本，保持项目中spring版本的一致，否则会出现spring容器初始化失败等问题。

2.重要的一些配置

2.1这里主要配置sqlSession和事物管理器，通过sqlSession可以直接操作数据库。

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="mapperLocations" value="classpath*:/sqlMaps/*.xml"/>
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory" />
    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

2.2 另一种方式，通过mybatis中提供的

SqlSessionDaoSupport，这里需要注入sqlSessionFactory，其他DAO对象只要继承或包含baseDao即可。

    <bean id="baseDao" class="net.idalang.dao.impl.BaseDao">
        <property name="sqlSessionFactory" ref="sqlSessionFactory" />
    </bean>

2.3 另外，对于一些数据操作逻辑不是很复杂的数据操作，直接使用mybatis-generator即可生成基本增删改查方法，提高效率。

2.3.1 引入插件

           <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>

2.3.2 简单配置

在classpath下创建generatorConfig.xml，关键配置：数据库驱动的位置，数据库连接的相关配置，对那些表进行table--》object，其他一些转换约定，如表前缀，对象命名等。

以下为sqlite数据库的一个简单配置：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>

    <classPathEntry location="your_maven_repo_path\org\xerial\sqlite-jdbc\3.7.15-M1\sqlite-jdbc-3.7.15-M1.jar"/>
    <context id="MysqlTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <jdbcConnection driverClass="org.sqlite.JDBC" connectionURL="jdbc:sqlite:your_DB_PATH" userId="id" password="pwd">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <javaModelGenerator targetPackage="your_model_target_packages" targetProject="src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <sqlMapGenerator targetPackage="sqlMaps" targetProject="src\main\resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <javaClientGenerator type="XMLMAPPER" targetPackage="your_mapper_target_package" targetProject="src\main\java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <table schema="idalang" tableName="news" domainObjectName="News" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">
            <property name="useActualColumnNames" value="true"/>
        </table>
    </context>

</generatorConfiguration>

参考资源：

1.这一个连接可以解决相关的所有问题

http://mybatis.github.io/spring/zh/