MyBatis入门（六）---mybatis与spring的整合
一、整合需要
1.1、方法
上一章中的数据
需要spring通过单例方式管理SqlSessionFactory
spring和mybatis整合生成代理对象，使用SqlSessionFactory创建SqlSession
(spring和mybatis整合自动完成)
持久层的mapper都需要由spring进行管理
二、创建项目整合环境
2.1、创建项目
2.2、数据
db.properties
#数据库配置信息
#驱动
driverClass=com.mysql.jdbc.Driver
#连接url
jdbcUrl=jdbc:mysql://localhost:3306/mybatis?character=utf8
#用户名
user=root
#密码
password=root
#连接池中保留的最小连接数
minPoolSize=10
#连接池中保留的最大连接数。Default: 15
maxPoolSize=20
#最大空闲时间,1800秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0
maxIdletime=1800
#当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3
acquireIncrement=3
#连接池中初始化连接数 应在minPoolSize与maxPoolSize之间取值。默认为3
initialPoolSize=15
2.3、confinguration
<?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>
<!--资源文件 -->
<properties resource="db.properties"/> <settings>
<!--开启延时加载 -->
<setting name="lazyLoadingEnabled" value="true"/>
<!--关闭立即加载 -->
<setting name="aggressiveLazyLoading" value="false"/>
<!--开启二级缓存 -->
<setting name="cacheEnabled" value="true" />
</settings>
<!-- 别名 -->
<typeAliases>
<!-- <typeAlias type="com.pb.mybatis.po.User" alias="User"/> -->
<package name="com.pb.ssm.po"/>
</typeAliases>
<!--配置 --> <environments default="development">
<environment id="development">
<!--事务 -->
<transactionManager type="JDBC"/>
<!--数据源 -->
<dataSource type="POOLED">
<property name="driver" value="${driverClass}"/>
<property name="url" value="${jdbcUrl}"/>
<property name="username" value="${user}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<package name="com.pb.ssm.mapper"/>
</mappers>
</configuration>
2.4 POJO类与接口
package com.pb.ssm.po; import java.util.Date; /**
* * @ClassName: Author * @Description: TODO(作者) * @author 刘楠 * @date 2015-10-31 下午12:39:33 *
*/
public class Author { //作者id
private Integer authorId;
//作者姓名
private String authorUserName;
//作者密码
private String authorPassword;
//作者邮箱
private String authorEmail;
//作者介绍
private String authroBio;
//注册时间
private Date registerTime; public Integer getAuthorId() {
return authorId;
}
public void setAuthorId(Integer authorId) {
this.authorId = authorId;
}
public String getAuthorUserName() {
return authorUserName;
}
public void setAuthorUserName(String authorUserName) {
this.authorUserName = authorUserName;
}
public String getAuthorPassword() {
return authorPassword;
}
public void setAuthorPassword(String authorPassword) {
this.authorPassword = authorPassword;
}
public String getAuthorEmail() {
return authorEmail;
}
public void setAuthorEmail(String authorEmail) {
this.authorEmail = authorEmail;
}
public String getAuthroBio() {
return authroBio;
}
public void setAuthroBio(String authroBio) {
this.authroBio = authroBio;
}
public Date getRegisterTime() {
return registerTime;
}
public void setRegisterTime(Date registerTime) {
this.registerTime = registerTime;
}
@Override
public String toString() {
return "Author [authorId=" + authorId + ", authorUserName="
+ authorUserName + ", authorPassword=" + authorPassword
+ ", authorEmail=" + authorEmail + ", authroBio=" + authroBio
+ ", registerTime=" + registerTime + "]";
} }
接口
package com.pb.ssm.mapper;
import com.pb.ssm.po.Author;
public interface AuthorMapper {
/**
*
* @Title: findAuthorById
* @Description: TODO(根据id查找)
* @param @param id
* @param @return 设定文件
* @return Author 返回类型
* @throws
*/
public Author findAuthorById(int id);
/**
*
* @Title: addAuthor
* @Description: TODO(添加)
* @param @param author
* @param @return 设定文件
* @return int 返回类型
* @throws
*/
public int addAuthor(Author author);
/**
*
* @Title: updateAuthor
* @Description: TODO(更新)
* @param @param author
* @param @return 设定文件
* @return int 返回类型
* @throws
*/
public int updateAuthor(Author author);
/**
* 删除
* @Title: delteAuthor
* @Description: TODO(根据ID删除)
* @param @param id
* @param @return 设定文件
* @return int 返回类型
* @throws
*/
public int delteAuthor(int id);
}
mapper.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.pb.ssm.mapper.AuthorMapper"> <!--开启本mapper下的二级缓冲
type指定为ehcachecache类开
在ehcache和mybatis的整合包中
-->
<cache /> <!--映射作者Author -->
<resultMap type="Author" id="authorResultMap">
<id property="authorId" column="author_id"/>
<result property="authorUserName" column="author_username"/>
<result property="authorPassword" column="author_password"/>
<result property="authorEmail" column="author_email"/>
<result property="authroBio" column="author_bio"/>
<result property="registerTime" column="register_time"/>
</resultMap>
<!-- 根据ID查找 -->
<select id="findAuthorById" parameterType="int" resultMap="authorResultMap">
select * from author
where author_id=#{id}
</select> <!--添加 -->
<insert id="addAuthor" parameterType="Author" useGeneratedKeys="true" keyProperty="authorId">
INSERT INTO author(author_username,author_password,author_email,author_bio)
VALUES(#{authorUserName},#{authorPassword},#{authorEmail},#{authroBio})
</insert> <update id="updateAuthor" parameterType="Author">
update author
<set>
<if test="authorUserName!=null and authorUserName!=''">author_username=#{authorUserName},</if>
<if test="authorPassword!=null and authorPassword!=''">author_password=#{authorPassword},</if>
<if test="authorEmail!=null and authorEmail!=''">author_email=#{authorEmail},</if>
<if test="authroBio!=null and authroBio!=''">author_bio=#{authroBio},</if>
<if test="registerTime!=null">register_time=#{registerTime}</if>
</set>
where author_id=#{authorId}
</update> <!--删除 -->
<delete id="delteAuthor" parameterType="int">
delete from author where author_id=#{authorId}
</delete>
</mapper>
三、使用Mybatis配置文件.xml整合
3.1、写ApplicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> <!--加载配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!--配置数据源
使用第三方数据源
也可以使用dbcp
或者 spring自带的:org.springframework.jdbc.datasource.DriverManagerDataSource
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.DataSources" destroy-method="close">
<!--加载数据库驱动 -->
<property name="driverClass" value="${driverClass}"/>
<!--连接数据库的URL -->
<property name="jdbcUrl" value="#{jdbcUrl}"/>
<!--连接数据库的用户名和密码 -->
<property name="user" value="${user}"/>
<property name="password" value="${password}"/>
<!-- 连接池中保留的最小连接数 -->
<property name="minPoolSize" value="${minPoolSize}"/>
<!-- 连接池中保留的最大连接数 -->
<property name="maxPoolSize" value="${maxPoolSize}"/>
<!-- 最大空闲时间 -->
<property name="maxIdletime" value="${maxIdletime}"/>
<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
<property name="acquireIncrement" value="${acquireIncrement}"/>
<!--连接池中初始化连接数 应在minPoolSize与maxPoolSize之间取值。默认为3-->
<property name="initialPoolSize" value="${initialPoolSize}"/>
</bean> <!--配置SqlSessionFacotry 在mybatis-spring包中-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据源 ,将上面的数据源注入-->
<property name="dataSource" ref="dataSource" />
<!-- 将mybatis的配置文件注入-->
<property name="configLocation" value="configuration.xml"/> </bean>
3.2、测试
package com.pb.ssm.mapper; import java.io.InputStream; import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; import com.pb.ssm.po.Author; public class AuthorMapperTest {
private ApplicationContext applicationContext; @Before
public void setUp() throws Exception {
applicationContext=new ClassPathXmlApplicationContext("ApplicationContext.xml");
} @Test
public void testFindAuthorById() { AuthorMapper authorMapper = (AuthorMapper) applicationContext.getBean("authorMapper");
Author author = authorMapper.findAuthorById(2);
System.out.println(author); } @Test
public void testAddAuthor() {
// 获取会话工厂
AuthorMapper authorMapper = (AuthorMapper) applicationContext.getBean("authorMapper"); Author author=new Author();
author.setAuthorUserName("程序猿");
author.setAuthorPassword("QWERdlfdad");
author.setAuthorEmail("QWER@qq.com"); int num = authorMapper.addAuthor(author); System.out.println("num="+num);
System.out.println("添加后的ID:"+author.getAuthorId());
} @Test
public void testUpdateAuthor() {
// 获取会话工厂
AuthorMapper authorMapper = (AuthorMapper) applicationContext.getBean("authorMapper");
Author author = authorMapper.findAuthorById(13);
author.setAuthroBio("天天写代码");
author.setAuthorUserName("码农");
int num=authorMapper.updateAuthor(author); System.out.println("num="+num);
System.out.println(author);
} @Test
public void testDeleteAuthor() {
// 获取会话工厂
AuthorMapper authorMapper = (AuthorMapper) applicationContext.getBean("authorMapper");
int num= authorMapper.delteAuthor(13); } }
四、不使用mybatis配置文件
4.1、写ApplicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> <!--开启自动扫描 -->
<!-- <context:component-scan base-package="com.pb.ssm"/> -->
<!--加载配置文件 -->
<context:property-placeholder location="db.properties"/>
<!--配置数据源
使用第三方数据源
也可以使用dbcp
或者 spring自带的:org.springframework.jdbc.datasource.DriverManagerDataSource
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<!--加载数据库驱动 -->
<property name="driverClass" value="${driverClass}"/>
<!--连接数据库的URL -->
<property name="jdbcUrl" value="${jdbcUrl}"/>
<!--连接数据库的用户名和密码 -->
<property name="user" value="${user}"/>
<property name="password" value="${password}"/>
</bean> <!--配置SqlSessionFacotry 在mybatis-spring包中-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据源 ,将上面的数据源注入-->
<property name="dataSource" ref="dataSource"/>
<!-- 扫描所有Mapper接口的实现类xml 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/pb/ssm/mapping/*.xml"/>
</bean> <!--为所有的Mapper接口注入sqlSessionFactory -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--基本路径 指定扫描的包名 -->
<property name="basePackage" value="com.pb.ssm.mapper"/>
<!-- 注入sqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean> <!--事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 注入数据源 -->
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
更改Mapper.xml，因为不能使用别名，所以type要写POJO类的全路径
<?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.pb.ssm.mapper.AuthorMapper"> <!--映射作者Author -->
<resultMap type="com.pb.ssm.po.Author" id="authorResultMap">
<id property="authorId" column="author_id"/>
<result property="authorUserName" column="author_username"/>
<result property="authorPassword" column="author_password"/>
<result property="authorEmail" column="author_email"/>
<result property="authroBio" column="author_bio"/>
<result property="registerTime" column="register_time"/>
</resultMap>
<!-- 根据ID查找 -->
<select id="findAuthorById" parameterType="int" resultMap="authorResultMap">
select * from author
where author_id=#{id}
</select> <!--添加 -->
<insert id="addAuthor" parameterType="com.pb.ssm.po.Author" useGeneratedKeys="true" keyProperty="authorId">
INSERT INTO author(author_username,author_password,author_email,author_bio)
VALUES(#{authorUserName},#{authorPassword},#{authorEmail},#{authroBio})
</insert> <update id="updateAuthor" parameterType="com.pb.ssm.po.Author">
update author
<set>
<if test="authorUserName!=null and authorUserName!=''">author_username=#{authorUserName},</if>
<if test="authorPassword!=null and authorPassword!=''">author_password=#{authorPassword},</if>
<if test="authorEmail!=null and authorEmail!=''">author_email=#{authorEmail},</if>
<if test="authroBio!=null and authroBio!=''">author_bio=#{authroBio},</if>
<if test="registerTime!=null">register_time=#{registerTime}</if>
</set>
where author_id=#{authorId}
</update> <!--删除 -->
<delete id="delteAuthor" parameterType="int">
delete from author where author_id=#{authorId}
</delete>
</mapper>
测试类同上
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