mybatis和spring的整合

2022-03-25 17:33:27 阅读：144 来源： 互联网

标签：userName String userCode spring phone 整合 address mybatis public

7.1、Mybatis步骤

编写实体类

public class User {

    private String userCode;
    private String userName;
    private String phone;
    private String address;

    public User() {
    }

    public User(String userCode, String userName, String phone, String address) {
        this.userCode = userCode;
        this.userName = userName;
        this.phone = phone;
        this.address = address;
    }

    public String getUserCode() {
        return userCode;
    }

    public void setUserCode(String userCode) {
        this.userCode = userCode;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "User{" +
                "userCode='" + userCode + '\'' +
                ", usrName='" + userName + '\'' +
                ", phone='" + phone + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

编写核心配置文件

<?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>
    <properties resource="jdbc.properties"/>

    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="cacheEnabled" value="true"/>
    </settings>

    <typeAliases>
        <typeAlias type="com.mhy.pojo.User" alias="user"/>
    </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>
        <mapper class="com.mhy.mapper.UserMapper"/>
    </mappers>

</configuration>

编写接口

public interface UserMapper {

    List<User> queryAllUser();

}

编写Mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">



<mapper namespace="com.mhy.mapper.UserMapper">
    <select id="queryAllUser" resultType="user">
        select user_code,user_name,phone,address from t_user;
    </select>
</mapper>

测试

public class UserMapperTest {

    @Test
    public void queryAllUser() throws IOException {
        String resource = "mybatis-config.xml";

        InputStream inputStream = Resources.getResourceAsStream(resource);

        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        SqlSession sqlSession = sessionFactory.openSession();

        UserMapper mapper = sqlSession.getMapper(UserMapper.class);

        List<User> users = mapper.queryAllUser();

        for (User user : users) {
            System.out.println(user);
        }

    }

}

7.2、mybatis和spring的整合

7.2.1、方式一

创建spring的xml文件

编写数据源

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="url" value="jdbc:mysql://localhost:3306/commodity?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </bean>

编写 SqlSessionFactoryBean的注入数据源和管理mybatis.xml

<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource"/>
      <property name="configLocation" value="classpath:mybatis-config.xml"/>
      <property name="mapperLocations" value="classpath:com/mhy/mapper/*.xml"/>
</bean>

编写SqlSessionTemplate来获取sqlSession来获取Mapper操作数据库

    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<!--        使用构造器注入sessionFactory,因为没有set方法-->
        <constructor-arg index="0" ref="sessionFactory"/>
    </bean>

需要给Mapper接口加实现类并在没有spring中注册

public class UserMapperImpl implements UserMapper {
    private SqlSessionTemplate sqlSessionTemplate;
    public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
        this.sqlSessionTemplate = sqlSessionTemplate;
    }
    
    @Override
    public List<User> queryAllUser() {
        return sqlSessionTemplate.getMapper(UserMapper.class).queryAllUser();
    }
}

    <bean id="userMapper" class="com.mhy.mapper.UserMapperImpl">
        <property name="sqlSessionTemplate" ref="sqlSessionTemplate"/>
    </bean>

7.2.2、方式二

前三步与方式一一样
Impl类需要继承SqlSessionDaoSupport并实现Mapper接口

然后set注入sessionFactory就可以了（这里使用的注解Autowired和Qualifier自动装配的）

@Repository(value = "userMapperImpl2")
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {

    @Autowired
    @Qualifier(value = "sessionFactory")
    @Override
    public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        super.setSqlSessionFactory(sqlSessionFactory);
    }

    @Override
    public List<User> queryAllUser() {
        return getSqlSession().getMapper(UserMapper.class).queryAllUser();
    }
}

标签：userName,String,userCode,spring,phone,整合,address,mybatis,public
来源： https://www.cnblogs.com/shuisanya/p/16055792.html

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mybatis和spring的整合

7.1、Mybatis步骤

7.2、mybatis和spring的整合

7.2.1、方式一

7.2.2、方式二