Spring-Mybatis的整合
Spring整合mybatis配置
Mybatis是ibatis的升级版，是一个基于java的持久层框架。Mybatis是支持普通SQL查询，存储过程和高级映射的优秀的持久层框架，
Mybatis 消除了几乎所有JDBC代码和参数的手工设置以及结果集的检索。
MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。
相对Hibernate和Apache OJB等“一站式”ORM解决方案而言，Mybatis 是一种“半自动化”的ORM实现
一.创建Maven工程（xml配置方式）
在pom.xml中添加jar包依赖：
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--引入需要的ehcache插件-->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>1.2.3</version>
</dependency>
<!--mybatis整合ehcache的jar-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-ehcache</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<!--阿里的DataSource数据源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
二.在resources下创建：
applicationContext.xml文件：
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
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">
<!--扫描注解-->
<context:component-scan base-package="cn.springmybatis"/>
<!--识别到配置文件-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--支持注解-->
<!--<tx:annotation-driven/>-->
<!--配置数据源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--配置SqlSessionFactoryBean-->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!--加载Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>
<!--扫描Dao层，省略代码-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.springmybatis.dao"/>
</bean>
<!--注入Dao层-->
<bean id="iBankDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="cn.springmybatis.dao.IBankDao"/>
<property name="sqlSessionFactory" ref="sqlSessionFactoryBean"/>
</bean>
<!--Service层-->
<bean id="iBankService" class="cn.springmybatis.service.impl.IBankServiceImpl">
<property name="iBankDao" ref="iBankDao"/>
</bean>
</beans>
jdbc.properties文件：
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///mybank?useUniCode=true&characterEncoding=utf-8&useSSL=true
jdbc.username=root
jdbc.password=root
mybatis-config.xml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>
<!--配置别名-->
<typeAliases>
<package name="cn.springmybatis"/>
</typeAliases>
<!--加载小配置文件-->
<mappers>
<package name="cn.springmybatis.dao"/>
</mappers>
</configuration>
三.搭建实体类
package cn.springmybatis.entity; public class IBankCard { private String bcard; private String bname; private Double bmoney; public IBankCard() { } public IBankCard(String bcard, String bname, Double bmoney) { this.bcard = bcard; this.bname = bname; this.bmoney = bmoney; } public String getBcard() { return bcard; } public void setBcard(String bcard) { this.bcard = bcard; } public String getBname() { return bname; } public void setBname(String bname) { this.bname = bname; } public Double getBmoney() { return bmoney; } public void setBmoney(Double bmoney) { this.bmoney = bmoney; } @Override public String toString() { return "IBankCard{" + "bcard='" + bcard + '\'' + ", bname='" + bname + '\'' + ", bmoney=" + bmoney + '}'; } }
三.Dao层和Service层
Dao层：
package cn.springmybatis.dao; import cn.springmybatis.entity.IBankCard; import java.util.List; public interface IBankDao { public List<IBankCard> getAllCard(); }
IBankDao.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"> <!--小配置根节点 namespace代表命名空间--> <mapper namespace="cn.springmybatis.dao.IBankDao"> <select id="getAllCard" resultType="IBankCard"> select * from bankcard </select> </mapper>
Service层：
package cn.springmybatis.service; import cn.springmybatis.entity.IBankCard; import java.util.List; public interface IBankService { public List<IBankCard> getAllCard(); }
package cn.springmybatis.service.impl; import cn.springmybatis.dao.IBankDao; import cn.springmybatis.entity.IBankCard; import cn.springmybatis.service.IBankService; import javax.annotation.Resource; import java.util.List; public class IBankServiceImpl implements IBankService { private IBankDao iBankDao; public List<IBankCard> getAllCard() { return iBankDao.getAllCard(); } public IBankDao getiBankDao() { return iBankDao; } public void setiBankDao(IBankDao iBankDao) { this.iBankDao = iBankDao; } }
测试类：
package cn.spring; import cn.springmybatis.dao.IBankDao; import cn.springmybatis.entity.IBankCard; import cn.springmybatis.service.IBankService; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.util.List; public class SpringMybatisTest { public static void main(String[] args) { ApplicationContext actx=new ClassPathXmlApplicationContext("applicationContext.xml"); IBankService iBankService = (IBankService)actx.getBean("iBankService"); List<IBankCard> allCard = iBankService.getAllCard(); for (IBankCard card:allCard){ System.out.println("name++:"+card.getBname()); } } }
执行结果：
注解方式：
注解方式只需要在Dao层加入 @Repository
@Repository public interface IBankDao { public List<IBankCard> getAllCard(); }
在Service层加入@Service("接口名")和
@Resource
private IBankDao iBankDao;即可
@Service("iBankService")
public class IBankServiceImpl implements IBankService {
@Resource
private IBankDao iBankDao;
public List<IBankCard> getAllCard() {
return iBankDao.getAllCard();
}
}
在application.xml文件中去掉如下代码：
<!-- <!–注入Dao层–> <bean id="iBankDao" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="cn.springmybatis.dao.IBankDao"/> <property name="sqlSessionFactory" ref="sqlSessionFactoryBean"/> </bean> <!–Service层–> <bean id="iBankService" class="cn.springmybatis.service.impl.IBankServiceImpl"> <property name="iBankDao" ref="iBankDao"/> </bean> -->
测试结果：
WangDaYe
浙公网安备 33010602011771号