1.在resources檔案下新建mysql.properties檔案

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/user?characterEncoding=utf8&useSSL=false&serverTimezone=UTC
username=root
password=lwxMysql

2.在resources檔案下新建config.xml檔案 並加入以下標籤

 <properties resource="mysql.properties"></properties>
    <!--    mybatis執行環境-->
    <environments default="development">
        <environment id="development">
    <!--            JDBC事務管理-->
            <transactionManager type="JDBC"></transactionManager>
    <!--            資料庫連線池-->
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
 

3.資料庫創表，寫資料

4.新建實體類User

package entity;
public class User {
    private int userid;
    private String userName;
    private String userPwd;

    public User(int id, String userName, String userPwd) {
        this.userid=id;
        this.userName = userName;
        this.userPwd = userPwd;
    }

    public String getUserName() {
        return userName;
    }

    public int getUserid() {
        return userid;
    }

    public void setUserid(int userid) {
        this.userid = userid;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPwd() {
        return userPwd;
    }

    public void setUserPwd(String userPwd) {
        this.userPwd = userPwd;
    }
}
 

5.在mapper包下建立my1Mapper.xml

 注意事項：namespace要用.到Mapper名字

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="mapper.my1Mapper">
<!--    id呼叫mybatis方法需要用到的引數-->
<!--    parameterType呼叫時引數型別-->
    <insert id="save" parameterType="entity.User" >
        insert into login(userid,userName,userPwd) values (#{userid},#{userName},#{userPwd})
    </insert>
</mapper>
 

6.在config.xml檔案中註冊my1Mapper.xml

 注意事項：路徑用/

   <mappers>
        <!-- 註冊my1Mapper-->
        <mapper resource="mapper/my1Mapper.xml"></mapper>
   </mappers>

7.新建測試類來測試

public void fun1(){
        /**
         * 使用原生介面
         *      1.在pom.xml中新增依賴
         *      2.建立mybatis配置檔案
         *      3.將sql語句寫在Mapper.xml中 並在配置檔案中註冊
         *      4.載入mybatis配置檔案
         *      5.得到SqlSession物件
         *      6.呼叫Mapper中的sql語句
         *      7.傳入引數並執行
         */

        InputStream is= App.class.getClassLoader().getResourceAsStream("config.xml");

        SqlSessionFactoryBuilder ssfb=new SqlSessionFactoryBuilder();
        SqlSessionFactory ssf=ssfb.build(is);
        SqlSession sqlSession=ssf.openSession();
        //呼叫insert
        String statement="mapper.my1Mapper.save";
        //存入的引數
        User m=new User(8,"lwx","lop");
        sqlSession.insert(statement,m);
        sqlSession.commit();
        sqlSession.close();

    }