MyBatis基本運行環境

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1.?創建項目

2.拷貝jar加入到項目中build path jar包

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3.創建數據庫的表及數據添加

USE [mybatis] CREATE TABLE [dbo].[Material]([id] [int] IDENTITY(1,1) NOT NULL,[name] [varchar](50) NULL,[price] [int] NULL )

4.創建實體類

package com.ahabest.bean; public class Material {//成員變量private Integer id;private String name;private Integer price;// 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 getPrice() {return price;}public void setPrice(Integer price) {this.price = price;}@Overridepublic String toString() {return "Material [id=" + id + ", name=" + name + ", price=" + price + "]";}public Material() {super();}public Material(Integer id, String name, Integer price) {super();this.id = id;this.name = name;this.price = price;} }

5.創建接口及映射

package com.ahabest.dao; import java.util.List; import com.ahabest.bean.Material; public interface MaterialDao {List<Material> getAll(); } <?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="test"><!-- id是找到SQL語句的唯一標識 --><!-- parameter表示傳入的參數類型 --><!-- resultType返回值的類型 --><select id="getAll" resultType="com.ahabest.bean.Material">SELECT * FROM Material</select><select id="getById" parameterType="java.lang.Integer" resultType="com.ahabest.bean.Material">SELECT * FROM Material WHERE id = #{id}</select> </mapper>

6.創建數據庫配置及映射

jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver jdbc.url=jdbc:sqlserver://localhost:1433;DatabaseName=mybatis jdbc.username=sa jdbc.password= <?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><!-- 加載數據庫的配置信息 --><properties resource="jdbc.properties"></properties><!-- mybatis的數據庫環境 --><environments default="Enviroment"><environment id="Enviroment"><!-- 事務管理 --><transactionManager type="JDBC"></transactionManager><!-- 數據源 --><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><mappers><mapper resource="com/ahabest/dao/MaterialMapper.xml"/></mappers></configuration>

7.讀取數據庫配置

package com.ahabest.dao.impl; import java.io.InputStream; import java.util.List; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import com.ahabest.bean.Material; import com.ahabest.dao.MaterialDao; public class MaterialDaoImpl implements MaterialDao {@Overridepublic List<Material> getAll() {// 讀取配置文件InputStream is = MaterialDaoImpl.class.getClassLoader().getResourceAsStream("mybatis-config.xml");//創建會話工廠SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(is);//開啟會話SqlSession ss =ssf.openSession();//調用方法List<Material> lm = ss.selectList("test.getAll");Material m = ss.selectOne("test.getById",1);System.out.println(m);return lm;} }

8.程序測試

package com.ahabest.test; import java.util.List; import com.ahabest.bean.Material; import com.ahabest.dao.MaterialDao; import com.ahabest.dao.impl.MaterialDaoImpl; public class MaterialDaoTest {public static void main(String[] args) {MaterialDao md = new MaterialDaoImpl();List<Material> lm = md.getAll();for(Material m:lm) {System.out.println(m);}} }

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轉載于:https://www.cnblogs.com/Aha-Best/p/10981806.html

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