1.建立控制檯程式。

2.匯入mysql和mybatis的jar包

3.建立mybatis配置檔案

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <typeAlias alias="User" type="models.User" 
 
/>
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property 
 
name="url" value="jdbc:mysql://127.0.0.1:3306/test?useSSL=true" />
                <property name="username" value="root" />
                <property name="password" value="" />
            </dataSource>
        </environment>
    </environments>
</configuration>

4.建立實體類

public class 
 
User {
    private int id;
    private String name;
    public int getId() {
        return id;
}

    public void setId(int id) {
        this.id = id;
}

    public String getName() {
        return name;
}

    public void setName(String name) {
        this.name = name;
}

    public User(int id, String name) {
        this.id = id;
        this.name = name;
}
    @Override
public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
}
}

5.建立IUser介面

public interface IUser {

    @Select("select * from tt where id =#{id}")
    public User getUserById(int id);
@Select("select * from tt")
    public List<User> getUserList();
@Insert("insert into tt(id,name) values(#{id},#{name})")
    public void insertUser(User user);
@Delete("delete from tt where id = #{id}")
    public  void deleteUserById(int id);
@Update("update tt set name=#{name} where id =#{id}")
    public void updateUserById(User user);
}

6.main函式

public class Main {

    private  static SqlSessionFactory sqlSessionFactory;
    private  static Reader reader;
    static {
        try {
            reader = Resources.getResourceAsReader("mybatis.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
sqlSessionFactory.getConfiguration().addMapper(IUser.class);
} catch (IOException e) {
            e.printStackTrace();
}
    }

    public static void main(String[] args) {
        //testSelect();
        //testInsert();
        //testDelete();
testUpdate();
}

    private static void  testSelect(){
        System.out.println("test select...");
SqlSession session = sqlSessionFactory.openSession();
        try {
            IUser iUser = session.getMapper(IUser.class);
List<User> users = iUser.getUserList();
users.forEach(m -> {
                System.out.println(m);
});
}finally {
            session.close();
}
    }

    private static void testInsert(){
        System.out.println("test insert...");
SqlSession session = sqlSessionFactory.openSession();
        try {
            IUser iUser = session.getMapper(IUser.class);
User testUser = new User(7, "name7");
iUser.insertUser(testUser);
session.commit();
}
        finally {
            session.close();
}
        System.out.println("趕緊去資料庫查查！！！");
}

    private static  void  testDelete(){
        System.out.println("test delete ...");
SqlSession session = sqlSessionFactory.openSession();
        try {
            IUser iUser = session.getMapper(IUser.class);
iUser.deleteUserById(7);
session.commit();
}finally {
            session.close();
}
        System.out.println("麻溜的去資料庫查查！！！");
}

    private static void testUpdate(){
        System.out.println("test update...");
SqlSession session = sqlSessionFactory.openSession();
        try {
            IUser iUser = session.getMapper(IUser.class);
User testUser = new User(5, "name5");
iUser.updateUserById(testUser);
session.commit();
}
        finally {
            session.close();
}
        System.out.println("...");
}
}