目录结构：

pom.xml文件

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

2

3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

4 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

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 1.8

38 UTF-8

39

40

41

42

43

44

mybatis.xml

1 <?xml version="1.0" encoding="utf-8"?>

2 /p>

3 "http://mybatis.org/dtd/mybatis-3-config.dtd">

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

/p>

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

INSERT INTO MAC_USER VALUES(#{userId},#{userName},#{phone})

DELETE FROM MAC_USER WHERE user_id=#{userId}

User.java

1 packagexfj.mybatis.entity;2

3 public classUser {4

5 privateInteger userId ;6

7 privateString userName ;8

9 privateString phone ;10

11 publicInteger getUserId() {12 returnuserId;13 }14

15 public voidsetUserId(Integer userId) {16 this.userId =userId;17 }18

19 publicString getUserName() {20 returnuserName;21 }22

23 public voidsetUserName(String userName) {24 this.userName =userName;25 }26

27 publicString getPhone() {28 returnphone;29 }30

31 public voidsetPhone(String phone) {32 this.phone =phone;33 }34 }

UserDao.java

packagexfj.mybatis.dao;importxfj.mybatis.entity.User;public interfaceUserDao {voidinsertUser(User user) ;voiddeleteUser(Integer userId) ;

}

UserDaoImpl.java

packagexfj.mybatis.dao.impl;importorg.apache.ibatis.session.SqlSession;importxfj.mybatis.dao.UserDao;importxfj.mybatis.entity.User;importxfj.mybatis.utils.MybatisUtl;public class UserDaoImpl implementsUserDao {

SqlSession session=MybatisUtl.getSqlSession() ;

@Overridepublic voidinsertUser(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();

}

}

@Overridepublic voiddeleteUser(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

packagexfj.mybatis.utils;importorg.apache.ibatis.io.Resources;importorg.apache.ibatis.session.SqlSession;importorg.apache.ibatis.session.SqlSessionFactory;importorg.apache.ibatis.session.SqlSessionFactoryBuilder;importjava.io.IOException;importjava.io.InputStream;public classMybatisUtl {/*定义SqlSessionFactory ,用来创建实例化sessionFactory*/

private staticSqlSessionFactory 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 = newSqlSessionFactoryBuilder().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 staticSqlSession getSqlSession(){return sqlSessionFactory.openSession(true) ;

}public static voidmain(String[] args) {

System.out.println(getSqlSession());

}

}

UserDaoTest.java测试类：

packagexfj.mybatis.test;importorg.junit.Test;importxfj.mybatis.dao.UserDao;importxfj.mybatis.dao.impl.UserDaoImpl;importxfj.mybatis.entity.User;public classUserDaoTest {/*@Test

public void insertUser(){

User user1 = new User() ;

user1.setUserId(13);

user1.setUserName("恭喜");

user1.setPhone("1265416989");

userDao.insertUser(user1);

}*/@Testpublic voiddeleteUser(){

UserDao userDao= newUserDaoImpl() ;//User user = new User() ;

userDao.deleteUser(4);

}

}

mybatis入门学习笔记，comeon