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: 3acquireIncrement=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("[e-mail]");

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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