新建maven项目
导入依赖
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.6.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.3.6.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.6.RELEASE</version>
</dependency>
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version> 1.2.17</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.3</version>
</dependency>
</dependencies>
pom开启过滤
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
User.java
package com.shrimpking.pojo;
/**
* Created by IntelliJ IDEA.
*
* @Author : Shrimpking
* @create 2023/7/11 9:55
*/
public class User
{
private Integer id;
private String username;
private String jobs;
private String phone;
public User()
{
}
public User(String username, String jobs, String phone)
{
this.username = username;
this.jobs = jobs;
this.phone = phone;
}
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 getJobs()
{
return jobs;
}
public void setJobs(String jobs)
{
this.jobs = jobs;
}
public String getPhone()
{
return phone;
}
public void setPhone(String phone)
{
this.phone = phone;
}
@Override
public String toString()
{
return "User{" + "id=" + id + ", username='" + username + '\'' + ", jobs='" + jobs + '\'' + ", phone='" + phone + '\'' + '}';
}
}
UserMapper.java
package com.shrimpking.mapper;
import com.shrimpking.pojo.User;
/**
* Created by IntelliJ IDEA.
*
* @Author : Shrimpking
* @create 2023/7/11 10:01
*/
public interface UserMapper
{
public User findUserById(Integer id);
}
UserMapper.xml
<?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.shrimpking.mapper.UserMapper">
<select id="findUserById" parameterType="integer" resultType="com.shrimpking.pojo.User">
select id,username,jobs,phone from a_user where id = #{id}
</select>
</mapper>
log4j.properties
log4j.rootLogger=ERROR,stdout
log4j.logger.com.shrimpking=DEBUG
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
mybatis-config.xml
<?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>
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimeZone=UTC"/>
<property name="username" value="root"/>
<property name="password" value="mysql123"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/shrimpking/mapper/UserMapper.xml"/>
</mappers>
</configuration>
MyTest.java
import com.shrimpking.pojo.User;
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 org.junit.Test;
import java.io.InputStream;
/**
* Created by IntelliJ IDEA.
*
* @Author : Shrimpking
* @create 2023/7/11 10:10
*/
public class MyTest
{
@Test
public void test() throws Exception
{
String resource = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
User user = sqlSession.selectOne("com.shrimpking.mapper.UserMapper.findUserById", 1);
System.out.println(user.toString());
sqlSession.close();
}
}