Spring整合Mybatis方式一

ゞ浴缸里的玫瑰 2022-10-21 03:51 147阅读 0赞

**1、User**

package com.zhang.pojo;
    import lombok.Data;
    @Data
    public class User { 
        private  int id;
        private  String  name;
        private  String pwd;
    }

**2、UserMapper.java**

package com.zhang.mapper;
    import com.zhang.pojo.User;
    import java.util.List;
    
    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.zhang.mapper.UserMapper">
        <select id="selectUser" parameterType="int" resultType="User">
            select * from  user
        </select>
    </mapper>

UserMapperImpl.java

<?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.zhang.mapper.UserMapper">
        <select id="selectUser" parameterType="int" resultType="User">
            select * from  user
        </select>
    </mapper>

**3、spring-dao.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:aop="http://www.springframework.org/schema/aop"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
            https://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/aop
            https://www.springframework.org/schema/aop/spring-aop.xsd">
             
            
            <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
                <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
                <property name="url" value="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8"></property>
                <property name="username" value="root"/>
                <property name="password" value="1234"/>
            </bean>
           
            <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
                <property name="dataSource" ref="datasource"></property>
                
                <property name="configLocation" value="classpath:mybatis-config.xml"></property>
                <property name="mapperLocations" value="classpath:com/zhang/mapper/*.xml"></property>
            </bean>
            
            <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
                
                <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
            </bean>
            <bean id="UserMapper" class="com.zhang.mapper.UserMapperImpl">
                <property name="sqlSession" ref="sqlSession"></property>
            </bean>
    </beans>

**4、MyTest.java**

import com.zhang.mapper.UserMapper;
    import com.zhang.pojo.User;
    import org.apache.ibatis.io.Resources;
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.apache.ibatis.session.SqlSessionFactoryBuilder;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import java.io.IOException;
    import java.io.InputStream;
    
    public class MyTest { 
        @Test
        public void test() throws IOException { 
            /* String resource = "mybatis-config.xml"; InputStream resourceAsStream = Resources.getResourceAsStream(resource); SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream); SqlSession session = sessionFactory.openSession(true); UserMapper mapper = session.getMapper(UserMapper.class); for (User user : mapper.selectUser()) { System.out.println("用户名："+user.getId()+" 姓名："+user.getName()+" 密码："+user.getPwd()); } */
            ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
            UserMapper mapper = context.getBean("UserMapper",UserMapper.class);
            for (User user : mapper.selectUser()  ) { 
                System.out.println(user);
            }
        }
    }

**5、执行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70]  
**6、项目整体目录结构**  
**6.1整体步骤：**  
1）编写数据源配置信息  
2）在xml中配置sqlSessionFactory  
3）在xml中配置sqlSessionTemplate  
4）需要给接口添加实现类  
5）将实现类注入到spring中  
6）测试类测试  
**6.2 jar包**

<dependencies>
           <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.5.2</version>
            </dependency>
    		<dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>2.0.6</version>
            </dependency>
            <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-webmvc</artifactId>
                 <version>5.1.9.RELEASE</version>
             </dependency>
             <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.1.9.RELEASE</version>
             </dependency>
              <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.9.6</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.13.2</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.16.10</version>
            </dependency>
        </dependencies>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70]: /images/20221021/364960a8cacd4481b9dde0a814b5717b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70 1]: /images/20221021/d5c2e35ace0d4ef18f0ba544872919f8.png