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初识mybatis之入门案例
我也是自学了一下，在idea中基于maven的mybatis的配置。有什么不对的地方，请指正，谢谢。
1.1咋们先来配置测试一下，配置mybatis的图解：
1.2 pom.xml需要mybatis的依赖节点，节点如下：
1 <dependencies> 2 <dependency> 3 <groupId>org.mybatis</groupId> 4 <artifactId>mybatis</artifactId> 5 <version>3.3.0</version> 6 </dependency> 7 <dependency> 8 <groupId>mysql</groupId> 9 <artifactId>mysql-connector-java</artifactId> 10 <version>5.1.29</version> 11 </dependency> 12 <dependency> 13 <groupId>junit</groupId> 14 <artifactId>junit</artifactId> 15 <version>4.12 </version> 16 <scope>test</scope> 17 </dependency> 18 <dependency> 19 <groupId>log4j</groupId> 20 <artifactId>log4j</artifactId> 21 <version>1.2.17</version> 22 </dependency> 23 <dependency> 24 <groupId>org.slf4j</groupId> 25 <artifactId>slf4j-api</artifactId> 26 <version>1.7.12</version> 27 </dependency> 28 <dependency> 29 <groupId>org.slf4j</groupId> 30 <artifactId>slf4j-log4j12</artifactId> 31 <version>1.7.12</version> 32 </dependency> 33 </dependencies>
1.3创建数据库脚本：（MySQL数据库、数据库叫mybatis）
1 /* 2 SQLyog v10.2 3 MySQL - 5.7.12-log : Database - mybatis 4 ********************************************************************* 5 */ 6 /*!40101 SET NAMES utf8 */; 7 /*!40101 SET SQL_MODE=‘‘*/; 8 /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; 9 /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE=‘NO_AUTO_VALUE_ON_ZERO‘ */; 10 /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; 11 /*Table structure for table `person` */ 12 CREATE TABLE `person` ( 13 `ID` int(11) DEFAULT NULL, 14 `USERNAME` varchar(30) DEFAULT NULL, 15 `AGE` int(11) DEFAULT NULL, 16 `MOBiLEPHONE` varchar(30) DEFAULT NULL 17 ) ENGINE=InnoDB DEFAULT CHARSET=utf8; 18 /*Data for the table `person` */ 19 insert into `person`(`ID`,`USERNAME`,`AGE`,`MOBiLEPHONE`) values (1,‘神奇‘,18,‘1361165680‘); 20 /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; 21 /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; 22 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
1.4 MybatisUtil 创建工具类
1 package utils; 2 import org.apache.ibatis.io.Resources; 3 import org.apache.ibatis.session.SqlSession; 4 import org.apache.ibatis.session.SqlSessionFactory; 5 import org.apache.ibatis.session.SqlSessionFactoryBuilder; 6 import java.io.IOException; 7 import java.io.Reader; 8 /** 9 * Created by 123 on 2017/06/29. 10 */ 11 public class MybatisUtil { 12 private final static SqlSessionFactory sqlSessionFactory; 13 14 static { 15 String resource="mybatis-config.xml"; 16 Reader reader =null; 17 try { 18 reader = Resources.getResourceAsReader(resource); 19 } catch (IOException e) { 20 e.printStackTrace(); 21 } 22 sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader); 23 } 24 25 /** 26 * 获取SqlSessionFactory 27 * @return SqlSessionFactory 28 */ 29 public static SqlSessionFactory getSqlSessionFactory(){ 30 return sqlSessionFactory; 31 } 32 33 /** 34 * 获取SqlSession 35 * @return SqlSession 36 */ 37 public static SqlSession getSqlSession(){ 38 return sqlSessionFactory.openSession(); 39 } 40 /** 41 * 关闭SqlSession 42 */ 43 public static void closeSession(SqlSession sqlSession){ 44 if (sqlSession!=null) 45 sqlSession.close(); 46 } 47 }
1.5Person实体类
1 package model; 2 3 /** 4 * Created by 123 on 2017/06/29. 5 */ 6 public class Person { 7 private int id; 8 private String userName ; 9 private int age ; 10 private String mobilePhone ; 11 12 public Person() { 13 this.id = id; 14 this.userName = userName; 15 this.age = age; 16 this.mobilePhone = mobilePhone; 17 } 18 19 public int getId() { 20 21 return id; 22 } 23 24 public void setId(int id) { 25 this.id = id; 26 } 27 28 public String getUserName() { 29 return userName; 30 } 31 32 public void setUserName(String userName) { 33 this.userName = userName; 34 } 35 36 public int getAge() { 37 return age; 38 } 39 40 public void setAge(int age) { 41 this.age = age; 42 } 43 44 public String getMobilePhone() { 45 return mobilePhone; 46 } 47 48 public void setMobilePhone(String mobilePhone) { 49 this.mobilePhone = mobilePhone; 50 } 51 }
1.6 Person.xml 实体类查询配置文件
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 3 <mapper namespace="com"> 4 <insert id="insertPerson" parameterType="Person" > 5 INSERT INTO PERSON(ID,USERNAME,AGE,MOBILEPHONE)VALUES (#{id},#{userName},#{age},#{mobilePhone}) 6 </insert> 7 8 <select id="queryById" parameterType="int" resultType="Person"> //可省略 9 SELECT * FROM PERSON WHERE ID=#{id} 10 </select> 11 12 <update id="updatePerson"> 13 UPDATE PERSON SET USERNAME=#{userName},AGE=#{age},MOBILEPHONE=#{mobilePhone} WHERE ID=#{id} 14 </update> 15 </mapper>
1.7 config.properties 连接数据字段配置文件
1 driver=com.mysql.jdbc.Driver 2 url=jdbc:mysql://localhost:3306/mybatis 3 username=sa 4 password=123
1.8 mybatis-config.xml 连接数据库配置文件 (由于截图没有截完整，所以缺少一部分，请不要误解，下面有完整配置文件)。
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE configuration 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-config.dtd"> 5 <configuration> 6 <properties resource="config.properties"/> 7 <typeAliases> 8 <typeAlias type="model.Person" alias="Person"/> 9 </typeAliases> 10 <environments default="development"> 11 <environment id="development"> 12 <transactionManager type="JDBC"/> 13 <dataSource type="POOLED"> 14 <property name="driver" value="${driver}"/> 15 <property name="url" value="${url}"/> 16 <property name="username" value="${username}"/> 17 <property name="password" value="${password}"/> 18 </dataSource> 19 </environment> 20 </environments> 21 <mappers> 22 <mapper resource="mapper/Person.xml"/> 23 </mappers> 24 </configuration>
1.9 log4.properties 日志配置文件
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 3 <mapper namespace="com"> 4 <insert id="insertPerson" parameterType="Person" > 5 INSERT INTO PERSON(ID,USERNAME,AGE,MOBILEPHONE)VALUES (#{id},#{userName},#{age},#{mobilePhone}) 6 </insert> 7 8 <select id="queryById" parameterType="int" resultType="Person"> 9 SELECT * FROM PERSON WHERE ID=#{id} 10 </select> 11 12 <update id="updatePerson"> 13 UPDATE PERSON SET USERNAME=#{userName},AGE=#{age},MOBILEPHONE=#{mobilePhone} WHERE ID=#{id} 14 </update> 15 </mapper>
2.0 PersonTest 测试类 (测试方法有两个，一个是插入数据方法，另外一个是查询对象名称方法，所以分两次截图了)
1 import model.Person; 2 import org.apache.ibatis.session.SqlSession; 3 import org.junit.Test; 4 import utils.MybatisUtil; 5 /** 6 * Created by 123 on 2017/06/29. 7 */ 8 public class PersonTest { 9 SqlSession sqlSession ; 10 @Test 11 public void insertPerson(){ 12 sqlSession = MybatisUtil.getSqlSession(); 13 Person person=new Person(); 14 person.setId(1); 15 person.setAge(18); 16 person.setMobilePhone("1361165680"); 17 person.setUserName("神奇"); 18 try { 19 sqlSession.insert("insertPerson",person); 20 sqlSession.commit(); 21 } catch (Exception e) { 22 e.printStackTrace(); 23 } finally { 24 MybatisUtil.closeSession(sqlSession); 25 } 26 } 27 28 29 @Test 30 public void queryById(){ 31 sqlSession=MybatisUtil.getSqlSession(); 32 33 try { 34 Person person =sqlSession.selectOne("queryById",1); 35 sqlSession.commit(); 36 System.out.println(person.getUserName()); 37 } catch (Exception e) { 38 e.printStackTrace(); 39 } finally { 40 MybatisUtil.closeSession(sqlSession); 41 } 42 } 43 }
2.1最后成功插入数据,截图如下：
有什么问题咋们可以讨论一下，配置mybatis基础案例也接近尾声了，咋们下次再见吧。
初识mybatis之入门案例
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