目录结构：
引入jdbc和mybatis的jar
1.创建mybatis的工具类SqlSessionFactoryUtil：
import java.io.InputStream;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
public class SqlSessionFactoryUtil {
private static SqlSessionFactory sqlSessionFactory;
public static SqlSessionFactory getSqlSessionFactory(){
if(sqlSessionFactory==null){
InputStream inputStream=null;
try{
inputStream=Resources.getResourceAsStream("mybatis-config.xml");
sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
}catch(Exception e){
e.printStackTrace();
}
}
return sqlSessionFactory;
}
public static SqlSession openSession(){
return getSqlSessionFactory().openSession();
}
}
2.配置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>
<properties resource="jdbc.properties"/>
<typeAliases>
<typeAlias alias="Student" type="com.java1234.model.Student"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/java1234/mappers/StudentMapper.xml" />
</mappers>
</configuration>
3.配置jdbc.properties：
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_mybatis?characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
4.创建实体类Student：
public class Student {
private Integer id;
private String name;
private Integer age;
public Student() {
super();
// TODO Auto-generated constructor stub
}
public Student(String name, Integer age) {
super();
this.name = name;
this.age = age;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
5.创建实体类对应的mapper和mapper对应的xml文件：
StudentMapper：
import com.model.Student;
public interface StudentMapper {public int add(Student student);
}
StudentMapper.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.mappers.StudentMapper">
<insert id="add" parameterType="Student" >
insert into t_student values(null,#{name},#{age})
</insert>
</mapper>
最后编写测试类：
import org.apache.ibatis.session.SqlSession;
import com.mappers.StudentMapper;
import com.model.Student;
import com.util.SqlSessionFactoryUtil;
public class StudentTest {
public static void main(String[] args) {
SqlSession sqlSession=SqlSessionFactoryUtil.openSession();
StudentMapper studentMapper=sqlSession.getMapper(StudentMapper.class);
Student student=new Student("小强",11);
int result=studentMapper.add(student);
sqlSession.commit();
if(result>0){
System.out.println("添加成功！");
}
}
}
以上则完成了mybatis的操作数据库。