springBoot整合Mybatis，Junit

笔记源码：https://gitee.com/ytfs-dtx/SpringBoot

整合Mybatis

SpringBoot的版本：2.2.5.RELEASE Mybatis版本：mybatis-spring-boot-starter 2.1.2

添加Mybatis的起步依赖

<!-- Mybatis的起步依赖 -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.2</version>
</dependency>

添加数据库的驱动坐标

springBoot自动管理了mysql驱动的坐标，不用自己导入版本

　　

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

添加数据库连接信息，并使用druid连接池

# DBconfiguration：
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: root
    url: jdbc:mysql://127.0.0.1:3306/test
    type: com.alibaba.druid.pool.DruidDataSource

创建User表

在test数据库中创建表

-- ----------------------------
-- Table structure for `user`
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(50) DEFAULT NULL,
  `password` varchar(50) DEFAULT NULL,
  `name` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('', 'zhangsan', '', '张三');
INSERT INTO `user` VALUES ('', 'lisi', '', '李四');

创建实体Bean

package xyz.ytfs.entity;

/**
 * @author by 雨听风说
 * @Classname User
 * @Description TODO(用户的实体)
 * @Date 2020/5/13 15:45
 */

public class User {

    private Integer id;
    private String username;
    private String password;
    private String name;

    public Integer getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

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

编写Mapper

package xyz.ytfs.mapper;

import xyz.ytfs.entity.User;

import java.util.List;

/**
 * @author by 雨听风说
 * @Classname UserMapper
 * @Description TODO(用户的mapper接口)
 * @Date 2020/5/13 15:49
 */

public interface UserMapper {

    List<User> findUserAll();
}

配置Mapper配置文件

<?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="xyz.ytfs.entity.User">
    <select id="findUserAll" resultType="xyz.ytfs.entity.User">
        select * from user;
    </select>
</mapper>

在application.yml中 添加mybatis信息

#mybatis信息
mybatis:
  #pojo别名扫描包
  type-aliases-package: xyz.ytfs.entity
  #加载Mybatis映射文件
  mapper-locations: classpath:xyz/ytf/mapper/*Mapper.xml

编写测试的controller

package xyz.ytfs.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import xyz.ytfs.entity.User;
import xyz.ytfs.mapper.UserMapper;

import java.util.List;

/**
 * @author by 雨听风说
 * @Classname MybatisController
 * @Description TODO(mybatis 的控制层)
 * @Date 2020/5/13 15:58
 */

@Controller
public class MybatisController {

    @Autowired
    private UserMapper userMapper;

    @RequestMapping("query")
    @ResponseBody
    public List<User> findUserALl() {
        return this.userMapper.findUserAll();
    }
}

测试

整合Junit

添加起步依赖

 <!-- springBoot整合junit测试的起起步依赖 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
</dependencies>

测试

package xyz.ytfs.test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import xyz.ytfs.MybatisApplication;
import xyz.ytfs.mapper.UserMapper;

/**
 * @author by 雨听风说
 * @Classname JunitTest
 * @Description TODO(Juint整合测试)
 * @Date 2020/5/13 16:40
 */

@RunWith(SpringRunner.class)
@SpringBootTest(classes = MybatisApplication.class)
public class JunitTest {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void testFindAll() {
        //查询并且循环输出
        this.userMapper.findUserAll().forEach(System.out::println);
    }
}