目录结构：

 

pom.xml文件

1 
      2 
     
       5     
      
       4.0.0
       6  7     
      
       xfj.mac
       8     
      
       MyBatisOne
       9     
      
       1.0-SNAPSHOT
      10     
      
       pom
      11 12     
      
       13         
       
        14             
        
         junit
        15             
        
         junit
        16             
        
         4.12
        17         
       18            
       19         
       
        20             
        
         org.mybatis
        21             
        
         mybatis
        22             
        
         3.4.5
        23         
       24         
       
        25             
        
         mysql
        26             
        
         mysql-connector-java
        27             
        
         5.1.28
        28         
       29     
      30 31     
      
       32         
       
        33             
        
         34                 
         
          maven-compiler-plugin
         35                 
         
          36                     
          
           1.8
          37                     
          1.838                     
          
           UTF-8
          39                 
         40             
        41         
       42     
      43 44 
     

 mybatis.xml

1 
      2  4  5 
     
       6     
       7     
      
        8         
        9         
       10 11         
       13         
       14     
      15 16     
      18     
      
       19         
       20         
       
        21             
        22             
        23             
        24             
        
         25                 
         26                 
         27                 
         28                 
         29                 
         30             
        31         
       32     
      33 34     
      35     
      
       36         
       37     
      38 
     

userDao.xml

     
     
         
          
          
      
               INSERT INTO MAC_USER VALUES(#{userId},#{userName},#{phone})    
          
         
          
      
               DELETE FROM MAC_USER WHERE user_id = #{userId}    
      
     

User.java

1 package xfj.mybatis.entity; 2  3 public class User { 4  5     private Integer userId ; 6  7     private String userName ; 8  9     private String phone ;10 11     public Integer getUserId() {12         return userId;13     }14 15     public void setUserId(Integer userId) {16         this.userId = userId;17     }18 19     public String getUserName() {20         return userName;21     }22 23     public void setUserName(String userName) {24         this.userName = userName;25     }26 27     public String getPhone() {28         return phone;29     }30 31     public void setPhone(String phone) {32         this.phone = phone;33     }34 }

UserDao.java

package xfj.mybatis.dao;import xfj.mybatis.entity.User;public interface UserDao {        void insertUser(User user) ;        void deleteUser(Integer userId) ;}

UserDaoImpl.java

package xfj.mybatis.dao.impl;import org.apache.ibatis.session.SqlSession;import xfj.mybatis.dao.UserDao;import xfj.mybatis.entity.User;import xfj.mybatis.utils.MybatisUtl;public class UserDaoImpl implements UserDao {        SqlSession session =  MybatisUtl.getSqlSession() ;    @Override    public void insertUser(User user) {       //SqlSession session =  MybatisUtl.getSqlSession() ;        try {            //执行保存操作            session.getMapper(UserDao.class).insertUser(user);        }catch(RuntimeException e){            e.printStackTrace();            //事务回滚            session.rollback();        }finally{            //关闭session            session.close();        }    }    @Override    public void deleteUser(Integer userId) {        try {            //执行删除操作            session.getMapper(UserDao.class).deleteUser(userId);        }catch (RuntimeException e){            e.printStackTrace();            session.rollback();        }finally {            session.close();        }    }}

MybatisUtil.java

 

package xfj.mybatis.utils;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;public class MybatisUtl {    /*定义SqlSessionFactory ,用来创建实例化sessionFactory*/    private static SqlSessionFactory sqlSessionFactory ;    static {        try {            //通过mybatis核心额配置文件，并创建一个输入流用来读取xml文件           InputStream is =  Resources.getResourceAsStream("mybatis.xml") ;           //创建一个SqlSessionFactoryBuilder构建器来实例化一个SqlSessionFactory，            //build方法传入一个输入流来解析配置文件，从而创建SqlSessionFactory          sqlSessionFactory =  new SqlSessionFactoryBuilder().build(is) ;        } catch (IOException e) {            e.printStackTrace();            throw new RuntimeException("mybatisUtil error!!") ;        }    }    //创建一个获取sqlsession的静态方法    public static SqlSession getSqlSession(){        return sqlSessionFactory.openSession(true) ;    }    public static void main(String[] args) {        System.out.println(getSqlSession());    }}

UserDaoTest.java测试类：

package xfj.mybatis.test;import org.junit.Test;import xfj.mybatis.dao.UserDao;import xfj.mybatis.dao.impl.UserDaoImpl;import xfj.mybatis.entity.User;public class UserDaoTest {    /*@Test   public void insertUser(){        User user1 = new User() ;        user1.setUserId(13);        user1.setUserName("恭喜");        user1.setPhone("1265416989");        userDao.insertUser(user1);    }*/    @Test    public void deleteUser(){        UserDao userDao = new UserDaoImpl() ;        //User user = new User() ;        userDao.deleteUser(4);    }}

mybatis入门学习笔记，comeon