Spring Boots &mybatis连接数据库配置步骤

1. 5个包 放到 POM

<!--mybatis -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>

<!--commons -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.6</version>
</dependency>
<dependency>
<groupId>commons-configuration</groupId>
<artifactId>commons-configuration</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>

2. 生产项目MAVEN 依赖

3. config aplication.java

//增加持久层

@MapperScan("com.jm.dao")

4. config application.yml

datasource:

url: jdbc:oracle:thin:@20.1.10.18:1521:jiumao

username: jiumao

password: 123456

mybatis:

configuration:

map-underscore-to-camel-case: true

5.dao

import com.jm.Model.UserDB;

import org.apache.ibatis.annotations.Select;

//注意这里是interface

public interface UserMapper {

//@Select("select `username`, `password` from user where username = #{username}")

// User getByUsername(String username);

//z这里没有分号

@Select("select 'userid' , 'username' , 'userno' ,'password'from users where username=#{username}")

UserDB getByUsername(String username);

}

6. @Autowired controller

@Autowired

UserMapper userMapper;