Beginning MyBatis 3 Part 3 : How to Get Table’s Generated Ids

I have a very simple MySql table with an auto increament primary key,

1	CREATE TABLE sampah

2

(

3	id INT(10) NOT NULL AUTO_INCREMENT,

4	name VARCHAR(30),

5	PRIMARY KEY (id)

6

)

my question is, how can i get my object’s generated primary key if i insert a new object to table “sampah”?

The answer is actually quite easy, as you can see here on my xml sql mapper, take a look an line 11.

01	<?xml version="1.0" encoding="UTF-8" ?>

02	<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

03	<mapper namespace="com.edw.mybatis.mapper.SampahMapper" >

04

05	<resultMap id="SampahMap" type="com.edw.mybatis.bean.Sampah" >

06	<id column="id" property="id" jdbcType="INTEGER" />

07	<result column="name" property="name" jdbcType="VARCHAR" />

08	</resultMap>

09

10	<insert id="saveUsingXML" parameterType="com.edw.mybatis.bean.Sampah"

11	useGeneratedKeys="true" keyProperty="id" >

12	insert into sampah(name)

13	values (#{name,jdbcType=VARCHAR})

14

</insert>

15

16

</mapper>

Here is my main java class, you can see how i got my generated id in line 25.

01	package com.edw.mybatis.main;

02

03	import com.edw.mybatis.bean.Sampah;

04	import com.edw.mybatis.config.MyBatisSqlSessionFactory;

05	import com.edw.mybatis.mapper.SampahMapper;

06	import org.apache.ibatis.session.SqlSession;

07	import org.apache.log4j.Logger;

08

09	public class Main {

10

11	private Logger logger = Logger.getLogger(Main.class);

12

13	public Main() {

14

}

15

16	private void testSampah() {

17	SqlSession session = MyBatisSqlSessionFactory.getSqlSessionFactory().openSession();

18

try {

19	SampahMapper sampahMapper = session.getMapper(SampahMapper.class);

20	Sampah sampah1 = new Sampah();

21	sampah1.setName("satu satu");

22	sampahMapper.saveUsingXML(sampah1);

23

24	// my generated ID

25	logger.debug(sampah1.getId());

26

27	session.commit();

28	} finally {

29	session.close();

30

}

31

}

32

33	public static void main(String[] args) {

34	Main main = new Main();

35	main.testSampah();

36

}

37

}

Easy isnt it?