mybatis的相关配置

    
        
    

    
      SELECT id,name,email,age FROM student ORDER BY id
    
    

package com.mxh;

import com.mxh.domain.Student;
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 java.io.IOException;
import java.io.InputStream;
import java.util.List;


public class MyApp {
    public static void main(String[] args) throws IOException {
        //访问mybatis读取student数据

        //1.定义mybatis主配置文件的名称，从类路径的根开始（target/classes）
        String config = "mybatis.xml";
        //2.读取这个config表示的文件
        InputStream is = Resources.getResourceAsStream(config);
        //3.创建了SQLSessionFactoryBuilder对象
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        //4.创建SqlSessionFactory对象
        SqlSessionFactory factory = builder.build(is);
        //5.【重要】获取SqlSession对象，从SQLSessionFactory中获取SqlSession
        SqlSession sqlSession = factory.openSession();
        //6.【重要】指定要执行的SQL语句的标识：SQL映射文件中的namespace + "." + 标签中的id值
        String sqlId = "com.mxh.dao.StudentDao"+ "." + "selectStudent";
        //7.执行SQL语句，通过sqlId找到语句
        List selectList = sqlSession.selectList(sqlId);
        //8.输出结果
        for (Student student : selectList) {
            System.out.println("学生："+student);
        }
        //9.关闭SQLSession对象
        sqlSession.close();
    }
}

    4.0.0

    com.mxh
    day01_helloMybatis
    1.0

    
        UTF-8
        1.8
        1.8
    

    
        
            junit
            junit
            4.11
            test
        

        
        
            org.mybatis
            mybatis
            3.5.1
        
        
        
            mysql
            mysql-connector-java
            8.0.26
        


    

    
        
            
                src/main/java
                
                    ***.xml
                
                
                false
            
            
                src/main/resources
                
                    ***.xml
                
                
                false