?
MyBatis的mybatis-config.xml主配置文件存在配置繁琐的问题：
可能配置不同的别名存在繁琐
指定mapper文件存在繁琐：
存在代码冗余：
Spring通过SqlSessionFactoryBean类整合sqlSessionFactory
通过注入方式获取主配置文件需要写的内容：1,2,3
Spring通过MapperScannerConfigure类来整合dao对象
?
pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itheima</groupId>
<artifactId>spring08</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>6</source>
<target>6</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!--spring依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.14.RELEASE</version>
</dependency>
<!--引入log4j日志坐标-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- Spring与MyBatis整合依赖需要导入-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.14.RELEASE</version>
</dependency>
<!--mybatis与spring依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
<!--连接池依赖 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.18</version>
</dependency>
<!-- 引入mysql依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.48</version>
</dependency>
<!-- 引入mybatis依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!-- 引入动态代理-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.1.14.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.8</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.3</version>
</dependency>
</dependencies>
</project>?
?UserDAO接口：
package com.baizhidu.dao;
import com.baizhidu.entity.User;
public interface UserDAO {
public void save(User user);
}
User类:
package com.baizhidu.entity;
import java.io.Serializable;
public class User implements Serializable {
private Integer id;
private String name;
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
conn.baizhidu.mapper文件夹下：
UserDAOMapper.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="com.baizhidu.dao.UserDAO">
<!--使用insert，update，delete，select标签来写sql语句-->
<!-- parameterType="user"指定方法的参数类型 -->
<insert id="save" parameterType="User">
insert into tb_users(name,password) values (#{name},#{password})
</insert>
</mapper>applicationContext.xml：
<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--
id:名字唯一
class属性：类的全限定名
通过写bean标签告诉工厂生产的对象
-->
<!--创建连接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&charaterEcoding=utf-8"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<!-- 创建SqlSessionFactory SqlSessionFactoryBean-->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--指定数据源-->
<property name="dataSource" ref="dataSource"></property>
<!--指定类别名-->
<property name="typeAliasesPackage" value="com.baizhidu.entity"></property>
<!--指定mapper文件-->
<property name="mapperLocations">
<!--mapperLocations对应的是数组类型的赋值 spring内置关键字代表src-->
<list>
<value>classpath:com.baizhidu.mapper/*Mapper.xml</value>
</list>
</property>
</bean>
<!--创建DAO对象 MapperScannerConfigure -->
<bean id="scanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"></property>
<property name="basePackage" value="com.baizhidu.dao"></property>
</bean>
</beans>
TestSpringMyBatis测试类：
package com;
import com.baizhidu.dao.UserDAO;
import com.baizhidu.entity.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestSpringMyBatis {
@Test
public void test1(){
ApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext.xml");
UserDAO userDAO=(UserDAO) ctx.getBean("userDAO");//UserDAO开头字母小写
User user=new User();
user.setName("xiaojr");
user.setPassword("999999");
userDAO.save(user);
}
}
