SELECT id,user_name as name,sex,age from person
<select id="find" resultType="com.luogg.domain.Person">
  SELECT id,user_name as name,sex,age from person
</select>

<!--配置命名空間,命名空間+ .id 是唯一的sql語句標示符-->
<mapper namespace="com.luogg.mapper.PersonMapper">
 <!--中介,當數據庫字段和實體bean對象屬性不一致時,做一個對應關系-->
 <resultMap id="personRM" type="com.luogg.domain.Person">
  <!--主鍵映射-->
  <id property="id" column="ID"></id>
  <!--普通字段,property指實體屬性,column結果集的字段名稱,一致的字段可以不寫-->
  <result property="name" column="USER_NAME"></result>
 </resultMap>
 <!--查詢所有數據,參數有id,resultType結果集,parameterType參數-->
 <!--注意 : sql語句中如果有要填寫集合的,比如查詢所有數據,返回一個Person的結果集,那么resultType參數直接寫 路徑+集合的類型
  比如: 返回一個Person集合,那么就填寫Person Bean所在的路徑+Person-->
 <select id="find" resultMap="personRM">
  SELECT * from person
 </select>
 <!--通過ID查詢數據,當有查詢條件時,需要寫parameterType,返回結果集仍然是Person, #{id}或者${id}都可以-->
 <select id="selById" parameterType="int" resultType="com.luogg.domain.Person">
  SELECT * FROM person WHERE id = #{id}
 </select>
</mapper>

<!--添加人員-->
 <insert id="insert" parameterType="com.luogg.domain.Person">
  INSERT INTO person(id,user_name,age,sex) VALUES(#{id},#{name},#{age},#{sex})
 </insert>

import com.luogg.domain.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 org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
/**
 * Created by luogg on 2017/2/17.
 */
public class TestMybatis {
 //SqlSessionFactory為線程安全的
 private SqlSessionFactory factory;
 @Before
 public void init() throws IOException {
  String resource = "sqlMapConfig.xml";
  InputStream is = Resources.getResourceAsStream(resource);
  factory = new SqlSessionFactoryBuilder().build(is);
 }
 @Test //查詢所有
 public void findAll() throws IOException {
  /**
   * 測試數據庫的連接
   * 1.定義一個String類型的變量resource,指向剛才配置的連接數據庫的xml文件
   * 2.創建一個輸入流,來讀取我們的數據庫配置文件
   * 3.輸入流創建工廠.
   * 4.有了工廠之后open工廠
   * 5.通過session訪問配置文件中的sql語句
   */
  SqlSession session = factory.openSession();
  //如何訪問PersonMapper.xml中的sql語句呢? 命名空間+ .id
  List<Person> list = session.selectList("com.luogg.mapper.PersonMapper.find");
  System.out.println(list.size());
  for(Person p : list){
   System.out.println(p);
  }
 }
 @Test //通過ID查詢人員信息
 public void selById(){
  SqlSession session = factory.openSession();
  Person p = session.selectOne("com.luogg.mapper.PersonMapper.selById",1);
  System.out.println(p);
 }
 @Test //添加人員信息
 public void add(){
  SqlSession session = factory.openSession();
  Person p = new Person();
  p.setId(4);
  p.setName("luogg");
  p.setAge(22);
  p.setSex(1);
  int i = session.insert("com.luogg.mapper.PersonMapper.insert",p);
  session.commit();
  if(i==1){
   System.out.print("添加人員成功");
  }
 }
}

<!--修改成員信息-->
 <update id="update" parameterType="com.luogg.domain.Person">
  UPDATE person SET user_name=#{name},age=#{age} WHERE id=#{id}
 </update>
 <!--查詢總的記錄-->
 <select id="count" resultType="int">
  SELECT COUNT(*) FROM person
 </select>

@Test //修改人員信息
 public void updatePer(){
  SqlSession session = factory.openSession();
  Person p = new Person();
  p.setId(4);
  p.setName("luoggg");
  //p.setSex(1);
  p.setAge(23);
  int i = session.update("com.luogg.mapper.PersonMapper.update",p);
  session.commit();
  if(i==1){
   System.out.print("修改信息成功");
  }
 }
 @Test //查詢總的記錄條數
 public void selCount(){
  SqlSession session = factory.openSession();
  int i = session.selectOne("com.luogg.mapper.PersonMapper.count");
  System.out.println(i);
 }

<!--帶條件查詢-->
 <select id="selByL" parameterType="map" resultMap="personRM">
  SELECT <include refid="cols"/> FROM person
  where user_name like #{name}
  AND sex=#{sex}
 </select>
@Test //帶條 件查詢
 public void selByL(){
  SqlSession session = factory.openSession();
  Map<String,Object> map = new HashMap<String, Object>();
  map.put("name","luo%");
  map.put("sex",1);
  List<Person> list = session.selectList("com.luogg.mapper.PersonMapper.selByL",map);
  System.out.println(list.size());
  for(Person p : list){
   System.out.println(p);
  }
 }