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：

			
        <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

#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：

​

/**
 * @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：

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

<?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：

在这些都创建完成之后，我们创建UserController

/**
 * @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：

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