Eclipse创建springboot+mybatis+gradle项目

1.新建项目

2.点击下一步，type选择Gradle

3.然后再点击Next,选择web,mysql，mybatis

4.点击finish，项目结构如下

5.配置build.gradle文件

plugins {
id 'org.springframework.boot' version '2.1.3.RELEASE'
id 'java'
}

apply plugin: 'io.spring.dependency-management'

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

repositories {
mavenCentral()

maven { url 'https://repo.spring.io/snapshot' }
maven { url 'https://repo.spring.io/milestone' }
}

dependencies {
compile('org.springframework.boot:spring-boot-starter')
testCompile('org.springframework.boot:spring-boot-starter-test')

compile 'mysql:mysql-connector-java'
compile 'org.springframework.boot:spring-boot-devtools'
//配置mybatis 数据源
compile("org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.0")
testCompile('org.mybatis.spring.boot:mybatis-spring-boot-starter-test:1.3.0')

//使用 Controller 的时候需要引入 web 包
compile('org.springframework.boot:spring-boot-starter-web')

}
6.数据库连接和mybatis配置 application.properties

#基本配置
spring.datasource.url=jdbc:mysql://localhost:9306/wise_secretgarden?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=admin
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
#使用mysql
spring.jpa.database = mysql
#是否显示sql语句
spring.jpa.show-sql=true
#mybatis配置
mybatis.typeAliasesPackage=com.example.demo.model
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

7.在src/main/resources目录下新建mybatis文件夹，在mybatis文件夹下建立mapper文件夹

8.建好实体类以及接口与实现接口和controller包跟类

9.mapper类

package com.example.demo.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import com.example.demo.model.Coach;

@Mapper
public interface CoachMapper {

   @Select("select * from coach")
   List<Coach>selectAll();

   List<Coach>select();
}

10.Coach.xml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="com.example.demo.dao.CoachMapper">

<select id="select" resultType="coach">
select * from coach
</select>

</mapper>

11.service接口类

package com.example.demo.service;

import java.util.List;

import com.example.demo.model.Coach;

public interface CoachService {
   List<Coach>selectAll();

   List<Coach>select();

}

12.service实现类

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.example.demo.dao.CoachMapper;
import com.example.demo.model.Coach;

@Service
public class CoachServiceImpl implements CoachService {

   @Autowired
   private CoachMapper cMapper;

   @Override
   public List<Coach> selectAll() {
       return cMapper.selectAll();
   }

   @Override
   public List<Coach> select() {
       return cMapper.select();
   }

}
13.controller类

package com.example.demo.controller;

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.example.demo.model.Coach;
import com.example.demo.service.CoachService;

@RestController
public class TesrController {

   @Autowired
   private CoachService coachService;


   @RequestMapping("/hello")
   public String hello() {
       return "hello world3";
   }

   @RequestMapping("/select")
   public List<Coach> select() {
       return coachService.selectAll();
   }

   @RequestMapping("/selects")
   public List<Coach> selects() {
       return coachService.select();
   }
}

14.程序入口类

package com.example.demo;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.example.demo.dao")
public class Hello2Application {

   public static void main(String[] args) {
       SpringApplication.run(Hello2Application.class, args);
   }

}

运行主入口