<?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="Person" type="com.example.mdemo.model.Person"/></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/demo01" /><property name="username" value="root"/><property name="password" value="root"/></dataSource></environment></environments><mappers><mapper resource="com/example/mdemo/model/Person.xml"/></mappers>
</configuration>

public class Person {private String FirstName;private String LastName;private int Age;public String getFirstName() {return FirstName;}public void setFirstName(String firstName) {FirstName = firstName;}public String getLastName() {return LastName;}public void setLastName(String lastName) {LastName = lastName;}public int getAge() {return Age;}public void setAge(int age) {Age = age;}
}

public interface IPersonOperation {public Person selectPersonsByFirstName(String FirstName);public List<Person> selectPersons(String FirstName);public void addPerson(Person person);public void updatePerson(Person person);public void deletePerson(String FirstName);}

<?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.example.mdemo.service.IPersonOperation"><select id="selectPersonsByFirstName" parameterType="String" resultType="Person">select * from `persons` where FirstName = #{FirstName} limit 1</select><select id="selectPersons" parameterType="string" resultMap="resultListPersons">select * from persons where FirstName like #{FirstName}</select><resultMap type="Person" id="resultListPersons"><result column="FirstName" property="FirstName" /><result column="LastName" property="LastName" /><result column="Age" property="Age" /></resultMap><insert id="addPerson" parameterType="Person"> insert into persons(FirstName,LastName,Age)  values(#{FirstName},#{LastName},#{Age})  </insert><update id="updatePerson" parameterType="Person" >update persons set FirstName=#{FirstName},LastName=#{LastName},Age=#{Age} where FirstName=#{FirstName}</update><delete id="deletePerson" parameterType="String">delete from persons where FirstName=#{FirstName}</delete></mapper>

public class Test {private static SqlSessionFactory sqlSessionFactory;private static Reader reader; static{try{reader    = Resources.getResourceAsReader("config/Configuration.xml");sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);}catch(Exception e){e.printStackTrace();}}public static SqlSessionFactory getSession(){return sqlSessionFactory;}public static void main(String[] args) {SqlSession session = sqlSessionFactory.openSession();/* try {Person user = (Person) session.selectOne("com.example.mdemo.model.PersonMapper.selectPersonsByFirstName", "FPPAU");System.out.println(user.getFirstName());System.out.println(user.getLastName());System.out.println(user.getAge());} finally {session.close();}*/try{IPersonOperation personOperation = session.getMapper(IPersonOperation.class);Person person = personOperation.selectPersonsByFirstName("FPPAU");System.out.println(person.getFirstName());System.out.println(person.getLastName());System.out.println(person.getAge());List<Person> persons = personOperation.selectPersons("FPPAU");for(Person p:persons){System.out.println(p.getFirstName());System.out.println(p.getLastName());System.out.println(p.getAge());}System.out.println(persons.size());Person pp = new Person();pp.setFirstName("Xu");pp.setLastName("OK");pp.setAge(40);personOperation.addPerson(pp);session.commit();Person ppp = new Person();ppp.setFirstName("Xu");ppp.setLastName("OK");ppp.setAge(20);personOperation.updatePerson(ppp);session.commit();personOperation.deletePerson("FPPAU");session.commit();session.commit();}finally{session.close();}    }
}