一、Mybatis整合spring（Mapper代理形式開發 掃描包形式配置）
一、整合思路
1、SqlSessionFactory物件應該放到spring容器中作為單例存在。
2、傳統dao的開發方式中，應該從spring容器中獲得sqlsession物件。
3、Mapper代理形式中，應該從spring容器中直接獲得mapper的代理物件。
4、資料庫的連線以及資料庫連線池事務管理都交給spring容器來完成。
二、導包
1、spring的jar包
2、Mybatis的jar包
3、Spring+mybatis的整合包。
4、Mysql的資料庫驅動jar包。
5、資料庫連線池的jar包。
三、加入配置

<?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>
	
	<mappers>
		<mapper resource="com/itheima/mapper/UserMapper.xml"/>
	</mappers>
</configuration>
 

applicationContext.xml的配置檔案，建議放在src下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 載入配置檔案 -->
	<context:property-placeholder location="classpath:db.properties"/>
	
	<!-- 資料庫連線池 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="maxActive" value="10" />
		<property name="maxIdle" value="5" />
	</bean>
	<!-- 配置SqlSessionFactory -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!--注入連線池  -->
		<property name="dataSource" ref="dataSource" />
		<!-- 載入 SqlMapConfig.xml 檔案-->
		<!-- configLocation:配置 ,是載入mybatis的全域性配置檔案，所以name只能取：configLocation-->
		<property name="configLocation" value="classpath:sqlMapConfig.xml"></property>
		
	</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 配置檔案所在的包
		basePackage：基礎包
		name只能為：basePackage
		 -->
		<property name="basePackage" value="com.itheima.mapper"></property>
	</bean>
</beans>
 

mapper包下的UserMapper.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.itheima.mapper.UserMapper">
		<select id="findQuerylist" resultType="com.itheima.dao.User"> 
			select * from user
		</select>
	</mapper>

mapper包下的UserMapper.java

package com.itheima.mapper;

import java.util.List;

import com.itheima.dao.User;

public interface UserMapper {
	//獲取全部的user物件
	List<User> findQuerylist();
}

src下的db.properties相當於連線池

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456

四、資料庫
名為user的資料庫

"1"	"王五"		"2"	
"10"	"張三"	"10/7/2014"	"1"	"北京市"
"16"	"張小明"		"1"	"河南鄭州"
"22"	"陳小明"		"1"	"河南鄭州"
"24"	"張三丰"		"1"	"河南鄭州"
"25"	"陳小明"		"1"	"河南鄭州"
"26"	"王五"			
"27"	"賬務27"	"9/10/2018"	"女"	"jks27"
"28"	"賬務"	"9/10/2018"	"男"	"jks"
"30"	"賬務"	"9/10/2018"	"男"	"jks"

User.java

package com.itheima.dao;
import java.io.Serializable;
import java.util.Date;
import java.util.List;



public class User implements Serializable {
	//private static final long serialVersionUID = 1L;
	private Integer id;
	private String username;// 使用者姓名
	private String sex;// 性別
	private Date birthday;// 生日
	private String address;// 地址
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", sex=" + sex
				+ ", birthday=" + birthday + ", address=" + address + "]";
	}
}

測試類

package com.itheima.dao;

import java.util.List;

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

import com.itheima.mapper.UserMapper;

public class JuntisDao {
	//@SuppressWarnings("resource")
	@Test
	public void test() {
		ApplicationContext classPathXmlApplicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
		UserMapper bean = (UserMapper) classPathXmlApplicationContext.getBean(UserMapper.class);
		List<User> findQuerylist = bean.findQuerylist();
		for (User user : findQuerylist) {
			System.out.println(user);
		}
	}
}

結果為：

log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
User [id=1, username=王五, sex=2, birthday=null, address=null]
User [id=10, username=張三, sex=1, birthday=Thu Jul 10 00:00:00 CST 2014, address=北京市]
User [id=16, username=張小明, sex=1, birthday=null, address=河南鄭州]
User [id=22, username=陳小明, sex=1, birthday=null, address=河南鄭州]
User [id=24, username=張三丰, sex=1, birthday=null, address=河南鄭州]
User [id=25, username=陳小明, sex=1, birthday=null, address=河南鄭州]
User [id=26, username=王五, sex=null, birthday=null, address=null]
User [id=27, username=賬務27, sex=女, birthday=Tue Oct 09 00:00:00 CST 2018, address=jks27]
User [id=28, username=賬務, sex=男, birthday=Tue Oct 09 00:00:00 CST 2018, address=jks]
User [id=30, username=賬務, sex=男, birthday=Tue Oct 09 00:00:00 CST 2018, address=jks]