Spring Boot：整合MyBatis

代碼

項目結構如下圖所示：

​

​pom.xml​

​:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.kaven</groupId>
    <artifactId>springboot_mybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot_mybatis</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <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>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>      

​

​application.yml​

​:

server:
  port: 8080

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/kaven?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT-8
    username: root

mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.kaven.springboot_mybatis.domin      

​

​UserDomin​

​類：

package com.kaven.springboot_mybatis.domin;

/**
 * @program: springboot_mybatis
 * @description: 使用者類
 * @author: Kaven
 * @create: 2018-11-18 16:16
 **/
public class UserDomin {
    private Integer id;
    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}      

​

​UserDao​

​接口:

package com.kaven.springboot_mybatis.dao;

import com.kaven.springboot_mybatis.domin.UserDomin;
import org.springframework.stereotype.Service;

/**
 * @program: springboot_mybatis
 * @description: 使用者資料通路層
 * @author: Kaven
 * @create: 2018-11-18 16:20
 **/
 
// 防止UserController報錯，添加@Service注解，不加不影響運作效果
@Service
public interface UserDao {

    /**
     * 添加使用者
     * */
    public int insert(UserDomin user);
}      

​

​UserController​

​類:

package com.kaven.springboot_mybatis.controller;

import com.kaven.springboot_mybatis.dao.UserDao;
import com.kaven.springboot_mybatis.domin.UserDomin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @program: springboot_mybatis
 * @description: 使用者資料控制器
 * @author: Kaven
 * @create: 2018-11-18 16:23
 **/
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserDao userDao;

    @PostMapping("/add")
    public int addUser(UserDomin user){
        System.out.println("添加使用者成功！");
        return userDao.insert(user);
    }
}      

​

​userDaoMapper.xml​

​：

<?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.kaven.springboot_mybatis.dao.UserDao" >
    <insert id="insert" parameterType="UserDomin">
        insert into user_test(age) values(#{age});
    </insert>
</mapper>      

package com.kaven.springboot_mybatis;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
// 掃描與mapper檔案映射的實體類
@MapperScan("com.kaven.springboot_mybatis.dao")   
public class SpringbootMybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootMybatisApplication.class, args);
    }
}