Mybaits入门使用

1.pom.xml配置信息

<dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.12</version>

            <scope>provided</scope>

        </dependency>

        <dependency>

            <groupId>org.mybatis</groupId>

            <artifactId>mybatis</artifactId>

            <version>3.1.1</version>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <version>5.1.38</version>

        </dependency>

    </dependencies>

　　测试类：

public class Person {

    private int id;

    private String name;

    private int age;

    private String address;

    private String birthday;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getAddress() {

        return address;

    }

    public void setAddress(String address) {

        this.address = address;

    }

    public String getBirthday() {

        return birthday;

    }

    public void setBirthday(String birthday) {

        this.birthday = birthday;

    }

    @Override

    public String toString() {

        return "Person [id=" + id + ", name=" + name + ", age=" + age + ", address=" + address + ", birthday="

                + birthday + "]";

    }

}

　　sql语句xml配置：

<?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="test1">

	<select id="querypersonbyid" parameterType="int" resultType="person">

		select id,name,age,birthday,address from Person where id = #{value}

	</select>

	<select id="querypersonbyname" parameterType="java.lang.String" resultType="person">

		select id,name,age,birthday,address from Person where name like "%${value}%"

	</select>

	<insert id="inserperson" parameterType="person">

		<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">

			SELECT LAST_INSERT_ID()

		</selectKey>

		insert into Person(name,age,address,birthday) value(#{name},#{age},#{address},#{birthday})

	</insert>

	<delete id="deletepersonbyid" parameterType="int">

		delete from Person where id = #{id}

	</delete>

	<delete id="updatepersonbyid" parameterType="person">

		update Person set name=#{name},age=#{age},birthday=#{birthday},address=#{address} where id = #{id}

	</delete>

</mapper>

　数据库访问配置：

<?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>  

    <!-- 加载属性文件 -->

    <properties resource="db.properties">

        <!--properties中还可以配置一些属性名和属性值 -->

        <!-- <property name="jdbc.driver" value=""/> -->

    </properties>  

    <typeAliases>

        <!-- 别名定义 -->

        <typeAlias type="com.youfan.entity.Person" alias="person" />

    </typeAliases>  

    <environments default="development">

        <environment id="development">

            <!-- 使用jdbc事务管理，事务控制由mybatis -->

            <transactionManager type="JDBC" />

            <!-- 数据库连接池，由mybatis管理 -->

            <dataSource type="POOLED">

                <property name="driver" value="${jdbc.driver}" />

                <property name="url" value="${jdbc.url}" />

                <property name="username" value="${jdbc.username}" />

                <property name="password" value="${jdbc.password}" />

            </dataSource>

        </environment>

    </environments>  

    <!-- 加载 映射文件 -->

    <mappers>

        <!--通过resource方法一次加载一个映射文件 -->

                <!--注意这里的路径和xml文件 -->

               <mapper resource="Person.xml" />

    </mappers>  

</configuration>

TestMybatis：

import java.io.IOException;

import java.io.InputStream;

import java.util.List;

import com.sun.org.apache.xpath.internal.SourceTree;

import com.youfan.entity.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.Test;

import java.io.InputStream;

public class TestMybatis {

    public SqlSessionFactory getfactory() throws IOException {

        String filepath="SqlMappingConfig.xml";

        InputStream in = Resources.getResourceAsStream(filepath);

       SqlSessionFactory sqlSessionFactory=new  SqlSessionFactoryBuilder().build(in);

       return sqlSessionFactory;

    }

    @Test

    public void testinsert() throws IOException {

        SqlSessionFactory sqlSessionFactory = this.getfactory();

        SqlSession sqlsession = sqlSessionFactory.openSession();

        Person person = new Person();

        person.setName("小高");

        person.setAddress("上海");

        person.setAge(15);

        person.setBirthday("05-04");

        sqlsession.insert("test1.inserperson", person);

        System.out.println("id "+person.getId());

        sqlsession.commit();

        sqlsession.close();

    }

    @Test

    public void testquerybyid() throws IOException{

        SqlSessionFactory sqlSessionFactory = this.getfactory();

        SqlSession sqlsession = sqlSessionFactory.openSession();

        Person person = sqlsession.selectOne("querypersonbyid", 6);

        System.out.println(person);

        sqlsession.close();

    }

    @Test

    public void testquerybyname() throws IOException{

        SqlSessionFactory sqlSessionFactory = this.getfactory();

        SqlSession sqlsession = sqlSessionFactory.openSession();

        List<Person> personlist = sqlsession.selectList("querypersonbyname", "小高");

        for(int i=0;i<personlist.size();i++){

            System.out.println(personlist.get(i));

        }

        sqlsession.close();

    }

    @Test

    public void testdeletebyid() throws IOException{

        SqlSessionFactory sqlSessionFactory = this.getfactory();

        SqlSession sqlsession = sqlSessionFactory.openSession();

        sqlsession.delete("deletepersonbyid", 6);

        sqlsession.commit();

        sqlsession.close();

    }

    @Test

    public void testupdatePerson() throws IOException{

        SqlSessionFactory sqlSessionFactory = this.getfactory();

        SqlSession sqlsession = sqlSessionFactory.openSession();

        Person person = new Person();

        person.setId(2);

        person.setName("有范");

        person.setAddress("北京");

        person.setAge(15);

        person.setBirthday("06-04");

        sqlsession.update("updatepersonbyid", person);

        sqlsession.commit();

        sqlsession.close();

    }

}

表字段：　

　用映射方法写：

mapper：

public interface PersonMapper {

	public Person querypersonbyid(int id);

	public List<Person> querypersonbyname(String name);

	public void inserperson(Person person);

	public void deletepersonbyid(int id);

	public void updatepersonbyid(Person person);

	public List<Person> querypersonbyvo(PersonVo personVo);

}

　　视图对象vo：

public class CustomPerson extends Person{

}

public class PersonVo {

	private CustomPerson customPerson;

	public CustomPerson getCustomPerson() {

		return customPerson;

	}

	public void setCustomPerson(CustomPerson customPerson) {

		this.customPerson = customPerson;

	}

}

　语句：

<?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.youfan.mapper.PersonMapper">

	<sql id="consutomsql" >

		<if test="customPerson != null">

			<if test="customPerson.name!=null and customPerson.name!=''">

					and name = "${customPerson.name}"

				</if>

				<if test="customPerson.birthday!=null and customPerson.birthday!='' ">

					and birthday = "${customPerson.birthday}"

			</if>

		</if>

	</sql>

	<select id="querypersonbyvo" parameterType="personVo" resultType="person">

	select * from Person

		<where>

			<include refid="consutomsql"></include>

		</where>

	</select>

	<select id="querypersonbyid" parameterType="int" resultType="person">

		select id,name,age,birthday,address from Person where id = #{value}

	</select>

	<select id="querypersonbyname" parameterType="java.lang.String" resultType="person">

		select id,name,age,birthday,address from Person where name like "%${value}%"

	</select>

	<insert id="inserperson" parameterType="person">

		<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">

			SELECT LAST_INSERT_ID()

		</selectKey>

		insert into Person(name,age,address,birthday) value(#{name},#{age},#{address},#{birthday})

	</insert>

	<delete id="deletepersonbyid" parameterType="int">

		delete from Person where id = #{id}

	</delete>

	<delete id="updatepersonbyid" parameterType="person">

		update Person set name=#{name},age=#{age},birthday=#{birthday},address=#{address} where id = #{id}

	</delete>

</mapper>

　　测试：

public class TestMybatis {

	public SqlSessionFactory getfactory() throws IOException{

		String filepath = "SqlMappingConfig.xml";

		InputStream in = Resources.getResourceAsStream(filepath);

		SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);

		return sqlSessionFactory;

	}

	@Test

	public void testinsert() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		Person person = new Person();

		person.setName("小白");

		person.setAddress("上海");

		person.setAge(15);

		person.setBirthday("05-04");

		personMapper.inserperson(person);

		System.out.println("id "+person.getId());

		sqlsession.commit();

		sqlsession.close();

	}

	@Test

	public void testquerybyid() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		Person person = personMapper.querypersonbyid(2);

		System.out.println(person);

		sqlsession.close();

	}

	@Test

	public void testquerybyname() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		List<Person> personlist = personMapper.querypersonbyname("小");

		for(int i=0;i<personlist.size();i++){

			System.out.println(personlist.get(i));

		}

		sqlsession.close();

	}

	@Test

	public void testdeletebyid() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		personMapper.deletepersonbyid(2);

		sqlsession.commit();

		sqlsession.close();

	}

	@Test

	public void testupdatePerson() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		Person person = new Person();

		person.setId(3);

		person.setName("老石");

		person.setAddress("北京");

		person.setAge(15);

		person.setBirthday("07-04");

		personMapper.updatepersonbyid(person);

		sqlsession.commit();

		sqlsession.close();

	}

	@Test

	public void testquerypersonbyvo() throws IOException{

		SqlSessionFactory sqlSessionFactory = this.getfactory();

		SqlSession sqlsession = sqlSessionFactory.openSession();

		PersonMapper personMapper = sqlsession.getMapper(PersonMapper.class);

		PersonVo personVo = new PersonVo();

		CustomPerson customPerson = new CustomPerson();

		customPerson.setName("老石");

		customPerson.setBirthday("07-04");

		personVo.setCustomPerson(customPerson);

		List<Person> personlist = personMapper.querypersonbyvo(personVo);

		for(int i=0;i<personlist.size();i++){

			System.out.println(personlist.get(i));

		}

		sqlsession.close();

	}

}

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