idea玩mybatis，终于搞出个hello mybatis。记录下过程，备忘。
很详细的一篇：SSM框架——详细整合教程（Spring+SpringMVC+MyBatis）
1、person表
CREATE TABLE `person` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(20) CHARACTER SET gb2312 NOT NULL,
`password` varchar(20) CHARACTER SET latin1 NOT NULL,
`sex` varchar(2) CHARACTER SET gb2312 DEFAULT NULL,
`email` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;
2、数据模型（bean）Person.java
package model; /**
* Created by DANNY on 2016/12/30.
*/
public class Person {
private Integer id;
private String name;
private String passWord;
private String sex;
private String email; 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 String getPassWord() {
return passWord;
} public void setPassWord(String passWord) {
this.passWord = passWord;
} public String getSex() {
return sex;
} public void setSex(String sex) {
this.sex = sex;
} public String getEmail() {
return email;
} public void setEmail(String email) {
this.email = email;
}
}
3、Person的mapper，xml配置文件
<?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">
<mapper namespace="model.PersonMapper">
<select id="queryPersonById" parameterType="int" resultType="Person"
useCache="false">
<![CDATA[
select * from person where id = #{id}
]]>
</select>
</mapper>
4、mybatis-config.xml配置文件
alias: 别名，第3步的resultType=“Person”，就是通过这里映射
<?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>
<!-- 配置别名 -->
<typeAliases>
<typeAlias type="model.Person" alias="Person" />
</typeAliases> <!-- 配置环境变量 -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test" />
<property name="username" value="root" />
<property name="password" value="test" />
</dataSource>
</environment>
</environments> <!-- 配置mappers -->
<mappers>
<mapper resource="model/PersonMapper.xml" />
</mappers> </configuration>
5、测试类PersonTest.java
selectOne第一个参数，为第3步中mapper的namespace.id
import model.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 java.io.Reader; /**
* Created by DANNY on 2016/12/30.
*/
public class PersonTest {
private static SqlSessionFactory sqlSessionFactory;
private static Reader reader; static {
try {
reader = Resources.getResourceAsReader("mybatis-config.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
}catch (Exception e){
e.printStackTrace();
}
} public static SqlSessionFactory getSessionFactory(){
return sqlSessionFactory;
} public static void main(String[] args){
SqlSession session = sqlSessionFactory.openSession();
try {
Person person = (Person)session.selectOne("model.PersonMapper.queryPersonById",1);
System.out.println(person.getEmail());
}catch (Exception e){
e.printStackTrace();
}finally {
session.close();
}
}
}
运行测试类的main方法，可从数据库查询出id=1的记录
danny.yao@13.com
Process finished with exit code 0
6、pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>danny.yao.mybatisLearning</groupId>
<artifactId>mybatisLearning</artifactId>
<version>1.0-SNAPSHOT</version> <dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
</project>