[大数据]MyBatis配置数据库

?

pom文件中添加依兰?

<dependencies>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.27</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.9</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->




    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.22</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>

数据库配置

<?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>

    <properties>
        <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
        <property name="urls" value="url:jdbc:mysql://localhost:3306/xl?serverTimezone=UTC"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </properties>
    <!--设置-->
    <settings>
        <!--显示SQL语句，以便于调试-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${urls}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
    <!--映射文件-->
    <mappers>
        <mapper resource="mappers/PersonMapper.xml"></mapper>
    </mappers>
</configuration>

创建mapper文件

<?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="com.xl.dao.PersonDao">
    <insert id="insert" parameterType="com.xl.pojo.Person">
insert into person(id,username,password)
 values (#{id},#{userName},#{passWord});</insert>

</mapper>

创建

public interface PersonDao {

    void insert(Person person);
}

创建ben

package com.xl.pojo;

public class Person {
    private Integer id;
    private String userName;
    private String passWord;
    private String realName;

    public Integer getId() {
        return id;
    }

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

    public String getUserName() {
        return userName;
    }

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

    public String getPassWord() {
        return passWord;
    }

    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }

    public String getRealName() {
        return realName;
    }

    public void setRealName(String realName) {
        this.realName = realName;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", userName='" + userName + '\'' +
                ", passWord='" + passWord + '\'' +
                ", realName='" + realName + '\'' +
                '}';
    }
}

单元测试

package com.xl.dao;

import com.xl.pojo.Person;
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 static org.junit.Assert.*;

public class PersonDaoTest {

    @org.junit.Test
    public void insert() {
        try {
            InputStream is = Resources.getResourceAsStream("mybatis.xml");

            SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);

            SqlSession sqlSession = sessionFactory.openSession();
            PersonDao mapper = sqlSession.getMapper(PersonDao.class);
            Person person = new Person();
            person.setPassWord("hello");
            person.setUserName("xueliang");

            mapper.insert(person);
            sqlSession.commit();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}