欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Spring08:整合Mybatis

程序员文章站 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

Spring08:整合Mybatis

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();
    }
}

Spring08:整合Mybatis

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

Spring08:整合Mybatis

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&amp;useUnicode=true&amp;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);
    }
}

Spring08:整合Mybatis

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

相关标签: Spring