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MyBatis环境搭建

Mybatis不管在什么工程中都可以使用,只要倒入所需要的jira,并进行简单的配置即可。

这里以对oracle数据库操作为例

1.倒入jira包:mybatis-3.1.1.jar和ojdbc6.jar。

2.建立实体类,用于映射数据表。

public class Person {	private Integer id;	private String name;	private Integer age;	//必须保证该类有个默认的构造器,不然在映射数据的时候将无法创建该类对象	public Person() {		// TODO Auto-generated constructor stub	}	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;	}}

 3.建立Dao接口映射,即创建一个操作数据表的接口,里面是操作数据表的方法声明,这面的方法名要和之后创建的mapper配置文件中的id对于

public interface PersonMapper {	void insertPerson(Person person);}

 4.建立mybatis主配置文件

<?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>		<settings>			<setting name="lazyLoadingEnabled" value="http://www.mamicode.com/false" />		</settings>		<typeAliases>			<typeAlias alias="person" type="com.lxw.domain.Person"/>		</typeAliases>		<environments default="development">			<environment id="development">				<transactionManager type="JDBC"/>				<dataSource type="POOLED">					<property name="driver" value="http://www.mamicode.com/oracle.jdbc.driver.OracleDriver"/>					<property name="url" value="http://www.mamicode.com/jdbc:oracle:thin:@localhost:1521:Sudy"/>					<property name="username" value="http://www.mamicode.com/JGCWDEV"/>					<property name="password" value="http://www.mamicode.com/11111111"/>				</dataSource>			</environment>		</environments>		<mappers>
              <!--这里的路径一定要对--> <mapper resource="com/lxw/service/dao/PersonMapper.xml"/> </mappers> </configuration>

 5.建立映射文件

<?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"><!--命名空间是对应接口全名--><mapper namespace="com.lxw.service.dao.PersonMapper">	<!--表名-->	<sql id=‘TABLE_NAME‘>person</sql>
     <!--取序列的值--> <sql id=‘TABLE_SEQUENCE‘>person_seq.nextval</sql>
     <!--sql语句后面不能有封号--> <insert id="insertPerson" parameterType="person"> insert into <include refid="TABLE_NAME" /> (id,name,age) values (<include refid="TABLE_SEQUENCE" />,#{name},#{age}) </insert></mapper>

 6.测试

public class TestMyBaties extends TestCase {		//指定MyBatis配置文件	private static final String RESOURCE = "mybatis-config.xml";		public void testBaties() throws IOException{				//1、指定MyBatis配置文件		Reader reader = Resources.getResourceAsReader(RESOURCE);		//2、创建SqlSessionFactory()		SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);				SqlSession session = null;		try {			//3、获取SqlSession			session = sessionFactory.openSession();			//4、获取DAO接口对象			PersonMapper mapper = session.getMapper(PersonMapper.class);						Person person = new Person();			person.setName("demo");			person.setAge(11);			mapper.insertPerson(person);			session.commit();//添加、修改、删除操作最后需要提交事务					} catch (Exception e) {			e.printStackTrace();		}finally{						//6、关闭SqlSession			if(session != null){				session.close();			}		}	}}

 

MyBatis环境搭建