Spring08:整合Mybatis
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2022-04-15 18:37:21
Spring08:整合MybatisMybatis回顾新建项目依赖,资源过滤,跳过测试 junit junit 4.13.1 ...
Spring08:整合Mybatis
Mybatis回顾
新建项目
依赖,资源过滤,跳过测试
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.1</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.4.2</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
</plugins>
</build>
db.properties
username=root
password=123456
url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=utf8
driver=com.mysql.jdbc.Driver
mybatis-config.xml
<?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>
<properties resource="db.properties"/>
<typeAliases>
<package name="com.wgg.pojo"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<package name="com.wgg.dao"/>
</mappers>
</configuration>
MybatisUtil
public class MybatisUtil {
private static SqlSessionFactory sqlSessionFactory;
static {
try {
String resource = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
//获取sqlSession连接
public static SqlSession getSession() {
return sqlSessionFactory.openSession();
}
}
实体类
@Data
public class User {
private int id;
private String name;
private String pwd;
}
UserMapper
public interface UserMapper {
public List<User> selectUser();
}
UserMapper.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.wgg.dao.UserMapper">
<select id="selectUser" resultType="User">
select * from user
</select>
</mapper>
测试
public class MyTest {
@Test
public void test(){
SqlSession session = MybatisUtil.getSession();
UserMapper mapper = session.getMapper(UserMapper.class);
List<User> users = mapper.selectUser();
for (User user : users) {
System.out.println(user);
}
session.close();
}
}
spring中整合mybatis
需要导入依赖
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
使用SqlSessionFactoryBean来创建SqlSessionFactory,属性dataSource
SqlSessionFactory来创建SqlSession
使用SqlSessionTemplate来替换SqlSession
整合实现一
mybatis-config.xml
<?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>
<typeAliases>
<package name="com.wgg.pojo"/>
</typeAliases>
</configuration>
beans.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<!--数据源的bean-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="username" value="root"/>
<property name="password" value="164582"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=utf8"/>
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
</bean>
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/wgg/dao/*.xml"/>
</bean>
<!--sqlSessionTemplate-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
<bean id="userDao" class="com.wgg.dao.UserDaoImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
User
@Data
public class User {
private int id;
private String name;
private String pwd;
}
UserMapper
public interface UserMapper {
public List<User> selectUser();
}
UserMapper.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.wgg.dao.UserMapper">
<select id="selectUser" resultType="User">
select * from user
</select>
</mapper>
UserDaoImpl
public class UserDaoImpl implements UserMapper {
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
public List<User> selectUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.selectUser();
}
}
测试
@Test
public void test2(){
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
UserDaoImpl userDao = (UserDaoImpl) context.getBean("userDao");
List<User> users = userDao.selectUser();
for (User user : users) {
System.out.println(user);
}
}
整合实现二
dao继承Support类,直接利用getSqlSession()获得
UserDaoImpl
public class UserDaoImpl extends SqlSessionDaoSupport implements UserMapper {
public List<User> selectUser() {
UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
return mapper.selectUser();
}
}
beans.xml
<bean id="userDao" class="com.wgg.dao.UserDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
本文地址:https://blog.csdn.net/qq_43349162/article/details/110239086
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