需要导入的包

        
            mysql
            mysql-connector-java
            5.1.47
        
        
            org.mybatis
            mybatis
            3.5.9
        
        
        
        org.springframework
        spring-jdbc
        5.3.15
        
        
        
            org.aspectj
            aspectjweaver
            1.9.4
        
        
            org.mybatis
            mybatis-spring
            2.0.6
        
        
            org.springframework
            spring-webmvc
            5.3.13
        
        
            junit
            junit
            4.12
            test
        
    

实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class user {
    private int id;
    private String name;
    private String pwd;
}

接口

public interface userMapper {
    List selectuser();
}

接口配置文件

<?xml version="1.0" encoding="UTF-8" ?>


    
      select * from mybatis.user
    

配置spring(这里采用最原始的方法)

<?xml version="1.0" encoding="UTF8"?>


    
    
        
        
        
        
    

    
    
        
        
        
        
        
    
    
        <!–SqlSessionTemplate类中只有有参构造，使用不了set注入–>
        
    

编写实现类

public class userMapperimpl implements userMapper{

    private SqlSessionTemplate sqlSession;

    public userMapperimpl(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List selectuser() {
        userMapper mapper = sqlSession.getMapper(userMapper.class);
        return mapper.selectuser();
    }
}

注册bean

测试

public class MyTest {
    @Test
    public void test() {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-Dao.xml");
        userMapper userMappers = context.getBean("userMapper2", userMapper.class);
        List users = userMappers.selectuser();
        for (user user : users) {
            System.out.println(user);
        }
    }
}

结果

user(id=2, name=aaa, pwd=bbb)
user(id=3, name=李四, pwd=1231233)
user(id=4, name=李三, pwd=123123)
user(id=5, name=夏鸥, pwd=23234234)

更精简整合Mybatis

mybatis-Spring提供了一个父类SqlSessionDaoSupport。我们直接继承这个类，再去spring中注入参数sqlSessionFactory。我们再调用方法getSqlSession()就可以得到sqlSession。这里我们可以不在spring中去注册

class="org.mybatis.spring.SqlSessionTemplate">

实现类

public class userMapperimpl2 extends SqlSessionDaoSupport implements userMapper{
    @Override
    public List selectuser() {
        return getSqlSession().getMapper(userMapper.class).selectuser();
    }
}

Spring配置

<?xml version="1.0" encoding="UTF8"?>


    
    
        
        
        
        
    

    
    
        
        
        
        
        
    
    
        
    

实现还是与前一种方式一样