spring和mybatis整合

1       spring和mybatis整合

1.1   整合思路

需要spring通过单例方式管理SqlSessionFactory。

持久层的mapper都需要由spring进行管理。

整合步骤：

u  基本环境的配置

• 创建项目
• 导入相关jar文件
• 创建相关包路径、pojo

u  Dao的配置（此处使用MyBatis代理接口的方式）

• 编写MyBatis主配置文件
• spring配置文件的整合
• MyBatis映射文件和Dao接口（及XXXMapper.java）的编写

u  service的配置

• 编写service接口和其实现类
• Spring对service管理的配置文件 

1.2   基本环境配置

创建一个新的java（或者web）工程

jar包：

• mybatis3.2.7的jar包
• spring3.2.0的jar包（包括：aopalliance-1.0.jar和aspectjweaver-1.6.11.jar）
• mybatis和spring的整合包：早期ibatis和spring整合是由spring官方提供，mybatis和spring整合由mybatis提供。

              mybatis-spring-1.2.2.jar

全部jar包：

 

工程结构：

  

applicationContext.xml  spring配置文件

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

</beans>

SqlMapperConfig.xml  mybatis配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

</configuration>

Log4j.properties  日志文件

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p [%t] %c{1}:%L - %m%n
#在开发环境下日志级别要设置成DEBUG，生产环境设置成info或error
log4j.rootLogger=DEBUG, stdout

db.properties    数据库配置文件

driver=oracle.jdbc.OracleDriver
url=jdbc:oracle:thin:@localhost:1521:xe
user=zhou
pwd=123456

1.3  Dao的配置

1.编写MyBatis主配置文件SqlMapperConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!-- 打印查询语句 -->
        <setting name="logImpl" value="STDOUT_LOGGING" />
    </settings>
    <typeAliases>
        <!--通过package, 可以直接指定package的名字， mybatis会自动扫描你指定包下面的javabean, 并且默认设置一个别名，默认的名字为： 
            javabean 的首字母小写的非限定类名来作为它的别名。 也可在javabean 加上注解@Alias 来自定义别名， 例如： @Alias(user) -->
        <package name="cn.inspur.domain" />
    </typeAliases>
        <!-- applicationcontext.xml中已做配置，全部交与spring容器管理 -->
<!--     <environments default="test"> 
         <environment id="test"> 
             <transactionManager type="JDBC"> 
             </transactionManager> 
             <dataSource type="POOLED"> 
                 <property name="driver" value="${driver}" /> 
                 <property name="url" value="${url}" /> 
                 <property name="username" value="${user}" /> 
                 <property name="password" value="${pwd}" /> 
             </dataSource> 
         </environment> 
     </environments> -->
<!-- spring的applicationcontext.xml中已做了扫描配置；但有些规则需要遵守
        1.XXXmapper.xml文件必须与XXXmapper.java（dao接口）同名；
        2.XXXmapper.xml文件必须与XXXmapper.java（dao接口）放在同一目录；
 -->
<!--     <mappers> 
         <package name="cn.inspur.bbs.mapper"/> 
     </mappers> -->
</configuration>

2.spring配置文件的整合applicationContext.xml

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

    <!-- 自动加载db.properties，供dataSource获取 -->
    <context:property-placeholder location="classpath:db.properties" />
    <!-- spring中配置Session工厂类，去读取mybatis的主配置文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="classpath:mybatis/SqlMapperConfig.xml"></property>
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置dataSource数据源，及mybatis自带的数据库连接池，也可以使用第三方连接池，如c3p0，druid等 -->
    <bean id="dataSource" class="org.apache.ibatis.datasource.pooled.PooledDataSource">
        <property name="driver" value="${driver}"></property>
        <property name="url" value="${url}"></property>
        <property name="username" value="${user}"></property>
        <property name="password" value="${pwd}"></property>
        <property name="poolMaximumActiveConnections" value="3"></property>
        <property name="poolMaximumIdleConnections" value="1"></property>
    </bean>
    <!-- 虽然mybatis自带事务管理类，但与spring整合后建议使用spring的事务管理类，将主动权交与spring管理 -->
    <bean id="dtm" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 虽然可以在mybatiscfg.xml通过mappers节点来配置所有mapper文件，但非常麻烦；
    借助MapperScannerConfigurer类可以自动扫描所有mapper映射文件，而不用在mybatiscfg.xml逐个添加;
    如果需要扫描多个包，以半角逗号分割 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.inspur.mapper"></property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>
<!-- 切面配置 -->
    <tx:advice id="txAdvice" transaction-manager="dtm">
        <tx:attributes>
            <tx:method name="insert*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    <aop:config>
<!-- 切点表示切所有service类 -->
        <aop:pointcut expression="execution(* *..*Service.*(..))" id="cut"/>
        <aop:advisor advice-ref="txAdvice"  pointcut-ref="cut"/>
    </aop:config>
</beans>

3.MyBatis映射文件和Dao接口（即XXXMapper.java）的编写

StudentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.inspur.mapper.StudentMapper">

    <resultMap type="student" id="studentMap">
        <id column="stu_id" property="stuId" />
        <result column="stu_name" property="stuName" />
        <result column="stu_birthdate" property="stuBirthdate" />
        <result column="stu_phone" property="stuPhone" />
    </resultMap>

    <sql id="studentColumn">
        stu_id,stu_name,stu_birthdate,stu_phone
    </sql>

    <select id="selectAllStudent" resultMap="studentMap">
        select
        <include refid="studentColumn" />
        from student
    </select>

    <select id="selectStudentById" resultMap="studentMap" parameterType="java.lang.Integer">
        select
        <include refid="studentColumn" />
        from student
        where 1=1
        <if test="#{stuId}!=null">
            and stu_id=#{stuId}
        </if>
    </select>

    <insert id="insertStudent" parameterType="student">
        insert into
        student(stu_id,stu_name,stu_birthdate,stu_phone)
        values(seqstu.nextval,#{stuName},#{stuBirthdate},#{stuPhone})
    </insert>
</mapper>

StudentMapper.java

package cn.inspur.mapper;

import java.util.List;

import cn.inspur.domain.Student;

public interface StudentMapper {
    public void insertStudent(Student s);
    public void updateStudent(Student s);
    public void deleteStudent(int stuId);
    public Student selectStudentById(int stuId);
    public List<Student> selectAllStudent();
}

1.4   service的配置

1. 编写service接口和其实现类

StudentService.java

package cn.inspur.service;

import java.util.List;

import cn.inspur.domain.Student;

public interface StudentService {
    public void insertStudent(Student s);
    public void updateStudent(Student s);
    public void deleteStudent(int stuId);
    public Student selectStudentById(int stuId);
    public List<Student> selectAllStudent();
}

StudentServiceImpl.java

package cn.inspur.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import cn.inspur.domain.Student;
import cn.inspur.mapper.StudentMapper;
import cn.inspur.service.StudentService;

public class StudentServiceImpl implements StudentService{
    @Autowired
    StudentMapper studentMapper;
    
    @Override
    public void insertStudent(Student s) {
        studentMapper.insertStudent(s);
    }

    @Override
    public void updateStudent(Student s) {
        studentMapper.updateStudent(s);
    }

    @Override
    public void deleteStudent(int stuId) {
        studentMapper.deleteStudent(stuId);
    }

    @Override
    public Student selectStudentById(int stuId) {
        return  studentMapper.selectStudentById(stuId);
    }

    @Override
    public List<Student> selectAllStudent() {
        return studentMapper.selectAllStudent();
    }

}

2.Spring对service管理的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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/tx http://www.springframework.org/schema/tx/spring-tx.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
    <bean id="studentService" class="cn.inspur.service.impl.StudentServiceImpl"></bean>

</beans>

1.5 测试

package cn.inspur.test;

import java.text.SimpleDateFormat;
import java.util.List;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.inspur.domain.Student;
import cn.inspur.service.StudentService;

public class Demo {
    @Test
    public void testInsert() throws Exception{
        ApplicationContext ctx=new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml","classpath:spring/applicationContext_services.xml");
        StudentService service=ctx.getBean("studentService", StudentService.class);
        Student s=new Student();
        s.setStuName("tom");
        s.setStuBirthdate(new SimpleDateFormat("yyyy-MM-dd").parse("1998-1-12"));
        s.setStuPhone("15012344321");
        service.insertStudent(s);
    }
    @Test
    public void testSelectAll() throws Exception{
        ApplicationContext ctx=new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml","classpath:spring/applicationContext_services.xml");
        StudentService service=ctx.getBean("studentService", StudentService.class);
        
        List<Student> list = service.selectAllStudent();
        System.out.println(list);
    }
}