* 有问题可以参加Java技术交流群:839366464
* 创建简单java maven项目,骨架quickstart
* 添加依赖
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.18.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.9</version>
</dependency>
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.16</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency>
<!--slf4j-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<!--log4j-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--slf4j到log4j-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
</dependency>
<!--Spring 和 MyBatis链接的jar-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
* 实体copy之前Mybatis工程
* Mapper 也是copy之前Mybatis工程
* 把名字get改成query,比较规范
public interface ClassesService {
/**
* 通过班级名字获得班级信息
* @param cname
* @return
*/
public Classes getClassesFromName(String cname);
}
@Service
public class ClassesServiceImpl implements ClassesService {
@Autowired
private ClassesMapper mClassesMapper;
@Override
public Classes getClassesFromName(String cname) {
return mClassesMapper.queryClassesFromName(cname);
}
}
* copy 数据库配置文件,log4j文件
* spring-mybatis配置文件,spring文件
<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--配置数据库连接池-->
<context:property-placeholder location="classpath:dbconfig.properties" file-encoding="utf-8"/>
<bean id="c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="jdbcUrl" value="${url}"></property>
<property name="user" value="${uname}"></property>
<property name="password" value="${password}"></property>
<property name="driverClass" value="${driver}"></property>
</bean>
<!--构建SqlSessionFactory:由于这里是与Spring结合的选择SqlSessionFactoryBean(里面包含SqlSessionFactory)-->
<bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="c3p0"></property>
<property name="mapperLocations" value="classpath:com/hx/hx02/dao/*.xml"></property>
<property name="typeAliasesPackage" value="com.hx.hx02.bean"></property>
</bean>
<!--扫描mapping文件对应dao文件所在的包-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.hx.hx02.dao"></property>
<property name="sqlSessionFactoryBeanName" value="ssf"></property>
</bean>
</beans>
<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="classpath:spring-mybatis.xml"></import>
<context:component-scan base-package="com.hx.hx02.*"></context:component-scan>
</beans>
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringTest {
@Autowired
private ClassesService mClassesService;
@Test
public void test1(){
Classes classes = mClassesService.getClassesFromName("html");
System.out.println(classes);
System.out.println(classes.getTeacher());
System.out.println(classes.getStudents());
}
}
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
<!--默认是true-->
<!--<filtering>true</filtering>-->
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<!--默认是true-->
<!--<filtering>true</filtering>-->
<include>**/*.xml</include>
</includes>
</resource>
</resources>
<?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>
<settings>
<!--开启延迟加载-->
<setting name="lazyLoadingEnabled" value="false"/>
<!--关闭积极加载-->
<setting name="aggressiveLazyLoading" value="true"/>
</settings>
</configuration>
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>