mybatis框架的初级使用-增加数据

mybatis.xml代码：

<?xml version="1.0" encoding="UTF-8"?>
<!-- 引入约束（引入这个东西后，这个配置文件则有了一些提示标签，并且有一些语法校验） -->
<!-- 提示alt+/ -->
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!-- mybatis.xml的父标签 -->
<configuration>
	<!-- 用来配置环境的（连接参数） -->
	<environments default="day">
    //当environment有多个时，environment需要有id标识，environments的default是启动默认哪一个environment的id
		<environment id="day">
			<transactionManager type="JDBC"></transactionManager>
			<dataSource type="POOLED">
				<!--value=${}  ${}语法是从.properties配置文件中获取对应值 -->
				<property name="driver" value="oracle.jdbc.OracleDriver"/>
				<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"/>
				<property name="username" value="scott"/>
				<property name="password" value="tiger"/>
			</dataSource>
		</environment>
	</environments>
	<!-- 配置映射xml配置文件路径 -->
	<mappers>
		<mapper resource="com/day/mapper/StudentMapper.xml"/>
	</mappers>
</configuration>

java实体类代码：

package com.day.entity;

public class Student {
	private int id;
	private String name;
	private int age;
	private double score;
	public Student() {
		super();
	}

	public Student(int id, String name, int age, double score) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
		this.score = score;
	}
	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 double getScore() {
		return score;
	}
	public void setScore(double score) {
		this.score = score;
	}
	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", age=" + age + ", score=" + score + "]";
	}
	
}

java的mapper代码：

<?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.xml的父标签 -->
<mapper namespace="a.b.c">
	<insert id="xzStudent" parameterType="com.day.entity.Student">
		<!-- 注意：sql结尾不要加分号 -->
		insert into STUDENT (ID,NAME,AGE,SCORE) values (#{id}, #{name}, #{age}, #{score})
	</insert>
</mapper>

java的测试代码：

package com.day.test;

import com.day.entity.Student;

import java.io.IOException;
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 Test {
	
	public static void main(String[] args) {
		//主配置文件的位置
				String resource = "mybatis.xml";
				//加载对应路径下的配置文件到流中
				InputStream inputStream = null;
				try {
					inputStream = Resources.getResourceAsStream(resource);
				} catch (IOException e) {
					e.printStackTrace();
				}
				//sqlSession工厂：用来创建sqlSession
				SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
				//创建sqlSession
				SqlSession sqlSession = sqlSessionFactory.openSession();
				/*
				 * 调用sqlSession的新增方法
				 * statement:mapper.xml的位置（namespace+id）
				 * parameter:参数
				 * result:这条sql影响的条目数
				 */
				int result = sqlSession.insert("a.b.c.xzStudent", new Student(11, "李四", 23, 90.01));
				//提交  没有下面这个无法插入到数据库中
				sqlSession.commit();
				System.out.println(result);
				//释放资源
				sqlSession.close();
	}
}