几分钟解决SpringBoot整合Myabtis

SpringBoot整合Mybatis XML形式

项目创建我就不演示了,我将项目需要的依赖列出来:

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<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>2.1.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
<version>5.1.27</version>
</dependency>

数据库的配置:application.properties

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#替换成你自己的即可
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://localhost:3306/bigjava18?userUnicode=true&characterEncoding=UTF-8
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

配置好数据库后,接下来我们定义一个实体类:

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/**
* @author xhq
* @date 2020/5/5 8:52
*/
public class User {
private int id;
private String username;
private String address;

@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", address='" + address + '\'' +
'}';
}

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 getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}
}

接下来呢定义一个mapper;

​ 创建一个UserMapper接口:

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public interface UserMapper {

List<User> getAllUser();

}

定义完之后我们就需要来创建 UserMapper.XML了,将相应的地址填写成你自己的即可

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<?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.m5f.springbootmyabtis.mapper.UserMapper">
<select id="getAllUser" resultType="cn.m5f.springbootmyabtis.entil.User">
select * from user;
</select>
</mapper>

项目目录:

image-20200506160428377

在这些都创建完成之后,我们创建UserController

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/**
* @author xhq
* @date 2020/5/5 8:58
*/

@RestController
public class MyController {
@Autowired
UserMapper userMapper;

@GetMapping("/hello")
public List<User> selectUser(){
return userMapper.getAllUser();
}
}
最后别忘了在主配置类中添加:
@MapperScan(basePackages =”cn.m5f.springbootmyabtis”(替换成你自己的路径哟)
(将你写的Myabtis扫描进去)

接下来让我们来运行一下吧:

image-20200506160659777

项目我已经上传到Git上,需要的同学可以去下载:https://github.com/xionghuaqiang/cn.m5f

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