更新时间:2022-10-04 15:18:17
log4j.properties
# Rules reminder: # DEBUG < INFO < WARN < ERROR < FATAL # Global logging configuration log4j.rootLogger=debug,stdout # My logging configuration... log4j.logger.cn.jbit.mybatisdemo=DEBUG ## Console output... log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%5p %d %C: %m%n log4j.logger.org.apache.ibatis=DEBUG ## log4j.logger.org.apache.jdbc.SimpleDataSource=DEBUG log4j.logger.org.apache.ibatis.jdbc.ScriptRunner=DEBUG ## log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapclientDelegate=DEBUG log4j.logger.java.sql.Connection=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG
myBatis-config.xml文件
通过package, 可以直接指定package的名字, mybatis会自动扫描你指定包下面的javabean,并且默认设置一个别名,默认的名字为非限定类名来作为它的别名。
<?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> <!-- 通过别名简化对类的使用 --> <typeAliases> <!-- <typeAlias type="cn.itcast.scm.entity.Dept" alias="Dept" /> --> <!-- 通过package, 可以直接指定package的名字, mybatis会自动扫描你指定包下面的javabean, 并且默认设置一个别名,默认的名字为非限定类名来作为它的别名。 --> <package name="zhongfucheng.entity"/> </typeAliases> <!-- <mappers> <mapper resource="cn/itcast/scm/entity/DeptMapper.xml" /> </mappers> --> </configuration>
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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd"> <!-- 配置数据源,记得去掉myBatis-config.xml的数据源相关配置 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver" /> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/scm?useUnicode=true&characterEncoding=UTF-8" /> <property name="user" value="root" /> <property name="password" value="root" /> </bean> <!-- 配置session工厂 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:myBatis-config.xml" /> <!--配置扫描式加载SQL映射文件,记得去掉mybatis-config配置--> <!-- <property name="mapperLocations" value="classpath:zhongfucheng/dao/*.xml"/>--> </bean> <!-- 配置事务管理器,管理数据源事务处理 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置事务通知 --> <tx:advice id="advice" transaction-manager="transactionManager"> <tx:attributes> <!-- 默认只处理运行时异常,可加rollback-for="Exception/Throwable"等处理所有异常或包括错误 --> <tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception" /> <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception" /> <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception" /> <tx:method name="*" propagation="SUPPORTS" /> </tx:attributes> </tx:advice> <!-- 配置切面织入的范围,后边要把事务边界定在service层 --> <aop:config> <aop:advisor advice-ref="advice" pointcut="execution(* cn.itcast.scm.service.impl.*.*(..))" /> </aop:config> <!-- 配置SessionTemplate,已封装了繁琐的数据操作,提交事务都不用做了。 --> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean> <!-- <context:component-scan base-package="*" /> --> <!-- 自动扫描组件,要把controller去除,他们是在spring-mvc.xml中配置,如果不去除会影响事务管理。 --> <context:component-scan base-package="cn.itcast"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 配置 转换器,对于在basePackage设置的包(包括子包)下的接口类, 如果接口类的全类名在Mapper.xml文件中和定义过命名空间一致, 将被转换成spring的BEAN,在调用 的地方通过@Autowired方式将可以注入接口实例 --> <!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactory" ref="sqlSessionFactory" /> <!–这里包名留意要不要改–> <property name="basePackage" value="zhongfucheng.dao" /> </bean> --> </beans>
SQL脚本
drop database if exists mybatis; create database mybatis CHARACTER SET UTF8; use mybatis; create table dept( dept_id int primary key auto_increment, dept_name varchar(50), dept_address varchar(50) ); insert into dept(dept_name,dept_address) values('研发部一部','广州'); insert into dept(dept_name,dept_address) values('研发部二部','广州'); insert into dept(dept_name,dept_address) values('研发部三部','深圳'); select * from dept;
实体:
package zhongfucheng.entity; import java.io.Serializable; public class Dept implements Serializable { private Integer deptId; private String deptName; private String deptAddress; public Integer getDeptId() { return deptId; } public void setDeptId(Integer deptId) { this.deptId = deptId; } public String getDeptName() { return deptName; } public void setDeptName(String deptName) { this.deptName = deptName; } public String getDeptAddress() { return deptAddress; } public void setDeptAddress(String deptAddress) { this.deptAddress = deptAddress; } @Override public String toString() { return "Dept [deptId=" + deptId + ", deptName=" + deptName + ", deptAddress=" + deptAddress + "]"; } }
映射文件
<?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="zhongfucheng.entity.DeptMapper"> <resultMap type="Dept" id="deptResultMap"> <id property="deptId" column="dept_id" /> <result property="deptName" column="dept_name" /> <result property="deptAddress" column="dept_address" /> </resultMap> <!-- id和命名空间用来定位SQL语句,parameterType表示参数的类型,resultMap返回类型 --> <select id="selectDept" parameterType="Integer" resultMap="deptResultMap"> <!--参数的写法#{deptID} --> select * from dept where dept_id=#{deptID} </select> <insert id="insertDept" parameterType="Dept"> insert into dept(dept_name,dept_address) values(#{deptName},#{deptAddress}); </insert> </mapper>
mybatis配置文件加载映射文件
<?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> <!-- 通过别名简化对类的使用 --> <typeAliases> <!-- <typeAlias type="cn.itcast.scm.entity.Dept" alias="Dept" /> --> <!-- 通过package, 可以直接指定package的名字, mybatis会自动扫描你指定包下面的javabean, 并且默认设置一个别名,默认的名字为非限定类名来作为它的别名。 --> <!--这里的包名留意要不要改--> <package name="zhongfucheng.entity"/> </typeAliases> <mappers> <mapper resource="zhongfucheng/dao/DeptMapper.xml" /> </mappers> </configuration>