Mybatis入門實例

一 工程目錄結構



二 數據表定義

mysql> describe kyly_user;

+--------------+--------------+------+-----+---------+----------------+

| Field | Type | Null | Key | Default | Extra |

+--------------+--------------+------+-----+---------+----------------+

| id | bigint(20) | NO | PRI | NULL | auto_increment |

| username | varchar(30) | YES | | NULL | |

| password | varchar(50) | YES | | NULL | |

| roleid | bigint(20) | YES | MUL | NULL | |

| sex | varchar(4) | YES | | NULL | |

| telphone | varchar(12) | YES | | NULL | |

| emailaddress | varchar(250) | YES | | NULL | |

| firstname | varchar(20) | YES | | NULL | |

| familyname | varchar(20) | YES | | NULL | |

| registtime | datetime | YES | | NULL | |

+--------------+--------------+------+-----+---------+----------------+

三 Mybatis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>
<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://localhost/qdkyly"/>
<property name="username" value="root"/>
<property name="password" value="*****"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/symantec/ps/purejdbc/mapper/SqlMap.xml"/>
</mappers>
</configuration>

四 用戶表Mapper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="com.symantec.ps.purejdbc.mapper">
<select id="selectUser" parameterType="int" resultType="com.symantec.ps.purejdbc.bean.UserBean">
select * from kyly_user where id = #{id}
</select>
</mapper>

五 userbean類定義

package com.symantec.ps.purejdbc.bean;

import java.util.Date;

public class UserBean{
public UserBean(){

}
private int id;
private String username;
private String password;
private int roleId;
private String sex;
private String emailaddress;
private String telephone;
private String firstname;
private String familyname;
private Date registtime;

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getRoleId() {
return roleId;
}
public void setRoleId(int roleId) {
this.roleId = roleId;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getEmailaddress() {
return emailaddress;
}
public void setEmailaddress(String emailaddress) {
this.emailaddress = emailaddress;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getFamilyname() {
return familyname;
}
public void setFamilyname(String familyname) {
this.familyname = familyname;
}
public Date getRegisttime() {
return registtime;
}
public void setRegisttime(Date registtime) {
this.registtime = registtime;
}

}

六 查詢測試

package com.symantec.ps;

import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.symantec.ps.purejdbc.bean.UserBean;

public class Client {
public static void main(String[] args) {
String configPath = "etc/mybatis-config.xml";
InputStream inputStream;
SqlSession session = null;
try {
inputStream = new FileInputStream(configPath);//Resources.getResourceAsStream(configPath);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
session = sqlSessionFactory.openSession();
} catch (Exception e) {
System.out.println(e.getMessage());
}

UserBean user = session.selectOne("selectUser",1);
System.out.println(user.getEmailaddress());
session.close();

}

}