SpringBoot MybatisPlus 环境搭建

SpringBoot MybatisPlus 环境搭建

SpringBoot MybatisPlus 环境搭建

本文介绍IntelliJ IDEA编译工具下，搭建SpringBoot2.1.7 MybatisPlus3.x开发环境

SpringBoot2.1.7

初始化工程

使用 Spring Initializer 快速初始化一个 Spring Boot 工程

这里采用Kotlin语言环境,Gradle自动构建工具

点击生产项目按钮

得到demo.zip项目压缩文件，将其解压

导入工程

打开IntelliJ IDEA

点击Import Project

选择demo.zip解析根目录下的build.gradle.kts

勾选Use auto-import自动导入文件，**Use default Gradle wrapper (recommended)**自动使用默认的gradle（一般为在线下载，本文Gradle版本为5.4,JDK版本1.8）

项目文件夹结构

引入依赖

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
	id("org.springframework.boot") version "2.1.7.RELEASE"
	id("io.spring.dependency-management") version "1.0.8.RELEASE"
	kotlin("jvm") version "1.2.71"
	kotlin("plugin.spring") version "1.2.71"
}

group = "com.example"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_1_8

repositories {
	mavenCentral()
}

dependencies {
	implementation("org.springframework.boot:spring-boot-starter")
	implementation("org.jetbrains.kotlin:kotlin-reflect")
	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
	implementation("org.springframework.boot:spring-boot-starter-jdbc")
	implementation("org.springframework.boot:spring-boot-starter-web")
	implementation("org.springframework.boot:spring-boot-starter-web-services")
	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
	implementation("org.jetbrains.kotlin:kotlin-reflect")
	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
	implementation("org.mybatis.spring.boot:mybatis-spring-boot-starter:2.1.0")
	testImplementation("org.springframework.boot:spring-boot-starter-test")
	testImplementation("org.springframework.boot:spring-boot-starter-test")
	compileOnly("org.projectlombok:lombok")
	runtimeOnly("mysql:mysql-connector-java")
	annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
	annotationProcessor("org.projectlombok:lombok")
	implementation("com.baomidou:mybatis-plus-boot-starter:3.2.0")
}

tasks.withType {
	kotlinOptions {
		freeCompilerArgs = listOf("-Xjsr305=strict")
		jvmTarget = "1.8"
	}
}

application.yml

代码片段

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test?useInformationSchema=true&autoReconnect=true&useUnicode=true&characterEncoding=utf-8&useSSL=false&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8
    username: root
    password: root

mybatis-plus:
  mapper-locations: classpath:mapper/xml/*.xml

测试

package com.example.demo

import com.example.demo.mapper.UserMapper
import com.example.demo.model.User
import org.junit.Assert
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 java.util.function.Consumer

@RunWith(SpringRunner::class)
@SpringBootTest
class DemoApplicationTests {

	@Test
	fun contextLoads() {
	}

	@Autowired
	private val userMapper: UserMapper? = null

	@Test
	fun testSelect() {
		println("----- selectAll method test ------")
		val userList = userMapper!!.selectList(null)
		Assert.assertEquals(5, userList.size)
		userList.forEach(Consumer { System.out.println(it) })
	}

}

Application

package com.example.demo

import org.mybatis.spring.annotation.MapperScan
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication

@SpringBootApplication
@MapperScan("com.example.demo.mapper")
class DemoApplication

fun main(args: Array) {
	runApplication(*args)
}

UserMapper

package com.example.demo.mapper

import com.baomidou.mybatisplus.core.mapper.BaseMapper
import com.example.demo.model.User

interface UserMapper : BaseMapper

User

package com.example.demo.model

import lombok.Data

@Data
class User {
    private val id: Long? = null
    private val name: String? = null
    private val age: Int? = null
    private val email: String? = null
}

使用Navicat连接本地MySql数据库，新建test数据库，运行schema.sql和user.sql脚本进行建表和导入数据

schema.sql

DROP TABLE IF EXISTS user;

CREATE TABLE user
(
	id BIGINT(20) NOT NULL COMMENT '主键ID',
	name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
	age INT(11) NULL DEFAULT NULL COMMENT '年龄',
	email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
	PRIMARY KEY (id)
);

user.sql

DELETE FROM user;

INSERT INTO user (id, name, age, email) VALUES
(1, 'Jone', 18, '[email protected]'),
(2, 'Jack', 20, '[email protected]'),
(3, 'Tom', 28, '[email protected]'),
(4, 'Sandy', 21, '[email protected]'),
(5, 'Billie', 24, '[email protected]');

进行测试

出现以下结果表示环境搭建成功