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概 述
Spring Boot工程集成 MyBatis来实现 MySQL访问的示例我们见过很多,而最近用到了微软的 SQL Server数据库,于是本文则给出一个完整的 Spring Boot + MyBatis + SQL Server 的工程示例。
工程搭建
- 新建 Spring Boot工程
-
pom.xml
中添加 MyBatis和 SQL Server相关的依赖
<!--for mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<!--for SqlServer-->
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4.0</version>
</dependency>
- 配置
application.properties
这里同样主要是对于 MyBatis 和 SQL Server连接相关的配置
server.port=89
# mybatis 配置
mybatis.type-aliases-package=cn.codesheep.springbt_mybatis_sqlserver.entity
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.configuration.map-underscore-to-camel-case=true
## -------------------------------------------------
## SqlServer 配置
spring.datasource.url=jdbc:sqlserver://xxxx:1433;databasename=MingLi
spring.datasource.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.datasource.username=xxxx
spring.datasource.password=xxxx
建立 SQL Server数据表和实体类
- 首先在 SQL Server数据库中新建数据表
user_test
作为测试用表
DROP TABLE [demo].[user_test]
GO
CREATE TABLE [dbo].[user_test](
[user_id] int NOT NULL ,
[user_name] varchar(50) NOT NULL ,
[sex] tinyint NOT NULL ,
[created_time] varchar(50) NOT NULL
)
GO
- 然后在我们的工程中对应建立的
User
实体类
其字段和实际数据表的字段一一对应
public class User {
private Long userId;
private String userName;
private Boolean sex;
private String createdTime;
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public Boolean getSex() {
return sex;
}
public void setSex(Boolean sex) {
this.sex = sex;
}
public String getCreatedTime() {
return createdTime;
}
public void setCreatedTime(String createdTime) {
this.createdTime = createdTime;
}
}
Mybatis Mapper映射配置
- MyBatis映射配置的 XML文件如下:
<?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="cn.codesheep.springbt_mybatis_sqlserver.mapper.UserMapper">
<resultMap id="userMap" type="cn.codesheep.springbt_mybatis_sqlserver.entity.User">
<id property="userId" column="user_id" javaType="java.lang.Long"></id>
<result property="userName" column="user_name" javaType="java.lang.String"></result>
<result property="sex" column="sex" javaType="java.lang.Boolean"></result>
<result property="createdTime" column="created_time" javaType="java.lang.String"></result>
</resultMap>
<select id="getAllUsers" resultMap="userMap">
select * from user_test
</select>
<insert id="addUser" parameterType="cn.codesheep.springbt_mybatis_sqlserver.entity.User">
insert into user_test ( user_id, user_name, sex, created_time ) values ( #{userId}, #{userName}, #{sex}, #{createdTime} )
</insert>
<delete id="deleteUser" parameterType="cn.codesheep.springbt_mybatis_sqlserver.entity.User">
delete from user_test where user_name = #{userName}
</delete>
</mapper>
- 与此同时,这里也给出对应 XML的 DAO接口
public interface UserMapper {
List<User> getAllUsers();
int addUser( User user );
int deleteUser( User user );
}
为了试验起见,这里给出了 增 / 删 / 查 三个数据库操作动作。
编写 Service 和测试Controller
- 上面这些准备工作完成之后,接下来编写数据库 CRUD的 Service类
@Service
@Primary
public class UserServiceImpl implements IUserService {
@Autowired
private UserMapper userMapper;
@Override
public List<User> getAllUsers() {
return userMapper.getAllUsers();
}
@Override
public int addUser(User user) {
SimpleDateFormat form = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
user.setCreatedTime( form.format(new Date()) );
return userMapper.addUser( user );
}
@Override
public int deleteUser(User user) {
return userMapper.deleteUser( user );
}
}
这里的 Service功能同样主要关于数据表的 增 / 删 / 查 三个数据库操作动作。
- 对照着上面的Service,我们编写一个对应接口测试的Controller
@RestController
public class UserController {
@Autowired
private IUserService userService;
@RequestMapping(value = "/getAllUser", method = RequestMethod.GET)
public List<User> getAllUser() {
return userService.getAllUsers();
}
@RequestMapping(value = "/addUser", method = RequestMethod.POST)
public int addUser( @RequestBody User user ) {
return userService.addUser( user );
}
@RequestMapping(value = "/deleteUser", method = RequestMethod.POST)
public int deleteUser( @RequestBody User user ) {
return userService.deleteUser( user );
}
}
实验测试
- 插入数据
依次用 POSTMAN通过 Post /addUser
接口插入三条数据:
{"userId":1,"userName":"刘能","sex":true}
{"userId":2,"userName":"赵四","sex":false}
{"userId":3,"userName":"王大拿","sex":true}
插入完成后去 SQL Server数据库里看一下数据插入情况如下:
- 查询数据
调用 Get /getAllUser
接口,获取刚插入的几条数据
- 删除数据
调用 Post /deleteUser
接口,可以通过用户名来删除对应的用户
后 记
由于能力有限,若有错误或者不当之处,还请大家批评指正,一起学习交流!
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