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
