??從最開始的SSH(Struts+Spring+Hibernate),到后來的SMM(SpringMVC+Spring+MyBatis),到目前的S(SpringBoot),隨著框架的不斷更新換代,也為我們廣大的程序猿提供了更多的方便,一起搭建一個從控制層到持久層的項目可能需要一兩天的時間,但是采用SpringBoot的方式,我們可能只需要10分鐘就能輕松完成一個web項目的搭建,下面我們介紹一下SpringBoot2.0整合MyBatis的方法
一、新建一個項目,引入相關依賴
<!-- 單元測試依賴 start -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- 單元測試依賴 end -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
二、新建一個實體類
public class User {
private Long id;
private String name;//姓名
private Integer age;//年齡
//。。。
}
三、新建一個Dao層
public interface UserDao {
int addUser(User user);
int deleteUserById(Long id);
int updateUserById(User user);
User queryUserById(Long id);
List<User> queryUserList();
}
四、新建MyBatis的sql操作文件
<?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.somta.springboot.dao.UserDao" >
<!-- Result Map-->
<resultMap id="BaseResultMap" type="com.somta.springboot.pojo.User" >
<result column="id" property="id"/>
<result column="name" property="name"/>
<result column="age" property="age"/>
</resultMap>
<!-- th_role_user table all fields -->
<sql id="Base_Column_List" >
id, name, age
</sql>
<insert id="addUser" parameterType="com.somta.springboot.pojo.User" >
insert into t_user (id, name, age)
values (#{id},#{name},#{age});
</insert>
<delete id="deleteUserById" parameterType="java.lang.Long">
delete from t_user where id=#{id}
</delete>
<update id="updateUserById" parameterType="com.somta.springboot.pojo.User" >
update t_user set
<trim suffixOverrides="," >
<if test="id != null and id != ''">
id=#{id},
</if>
<if test="name != null and name != ''">
name=#{name},
</if>
<if test="age != null and age != ''">
age=#{age},
</if>
</trim> where id=#{id}
</update>
<select id="queryUserById" resultMap="BaseResultMap" parameterType="java.lang.Long">
select <include refid="Base_Column_List" />
from t_user where id = #{id}
</select>
<select id="queryUserList" resultMap="BaseResultMap">
select <include refid="Base_Column_List" />
from t_user
</select>
</mapper>
五、修改相關配置文件和MyBatis配置
@SpringBootApplication
@MapperScan("com.somta.springboot.dao")
public class Application {
public static void main(String [] args) {
SpringApplication.run(Application.class, args);
}
}
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapper-locations: classpath*:mybatis/**/Mysql_*Mapper.xml
通過@MapperScan("com.somta.springboot.dao")指定Dao層的包路徑,通過mapper-locations配置了MyBatis文件的掃描路徑,達到對應映射的效果
六、編寫單元測試類
/**
*
* @author 明天的地平線
*
* SpringBoot 之前的版本配置單元測試類時使用 @SpringApplicationConfiguration(Application.class)
* SpringBoot 1.5.9 改用@SpringBootTest(classes = Application.class)
*
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = Application.class)
public class MyBatisTest {
@Autowired
private UserDao userDao;
/**
* 新增用戶
* @throws Exception
*/
@Test
public void testAddUser() throws Exception {
User user = new User();
user.setId(889L);
user.setName("zhangsan");
user.setAge(12);
userDao.addUser(user);
}
/**
* 刪除用戶
* @throws Exception
*/
@Test
public void testDelUser() throws Exception {
userDao.deleteUserById(889L);
}
/**
* 修改用戶信息
* @throws Exception
*/
@Test
public void testUpdUser() throws Exception {
User user = new User();
user.setId(2L);
user.setName("zhangsan99");
user.setAge(122);
userDao.updateUserById(user);
}
/**
* 查詢用戶
* @throws Exception
*/
@Test
public void testQueryUser() throws Exception {
User user = userDao.queryUserById(2L);
System.out.println(user.getName());
}
/**
* 查詢所有用戶
* @throws Exception
*/
@Test
public void testQueryUserList() throws Exception {
List<User> list = userDao.queryUserList();
for (User user : list) {
System.out.println(user.getName());
}
}
}
Git代碼地址:https://gitee.com/Somta/SpringBoot/tree/master/SpringBoot-mybatis
原文地址:http://somta.com.cn/#/blog/view/b8333bea30ca4500abb01e470121ba14
本文由明天的地平線創作,如想了解更多更詳細的內容,請關注一下公眾號,公眾號內將進行最新最實時的更新!