首先找到File-new-Project找到Spring Initializr
然后点击next,填写好后继续next
选择左边的列web，右边列勾选web框
然后勾选需要的mysql mybatis等
如果前面没有修改工程名称，可以在这一界面更改，然后点击finish。
项目开始生成，界面右下角回弹出一个小方框，点击Enable Autop-Import ，idea 会自动下载jar包，时间比较长 （5分钟左右）
6、等待片刻后，项目格式如下图。controller,mapper,model,service是后来我新建的。
构建pom
4.0.0 org.springframework.boot spring-boot-starter-parent 2.1.7.RELEASE com.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter 1.3.1 mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
创建application.properties文件
#基本配置 spring.datasource.url=jdbc:mysql://127.0.0.1:3306/liujilu?useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC spring.datasource.username=用户名 spring.datasource.password=密码 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.config-location=classpath:mybatis-config.xml // 配置文件位置 mybatis.typeAliasesPackage=com.example.demo.model mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
user实体类
package com.example.demo.model;
public class User {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
创建Usermapper 接口
package com.example.demo.mapper;
import com.example.demo.model.User;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
@Mapper
public interface UserMapper {
public List selectList();
}
创建接口 UserService
package com.example.demo.service;
import com.example.demo.model.User;
import java.util.List;
public interface UserService {
public List selectList();
}
创建UserServiceImpl
package com.example.demo.service;
import com.example.demo.mapper.CoachMapper;
import com.example.demo.mapper.UserMapper;
import com.example.demo.model.Coach;
import com.example.demo.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper uMapper;
@Override
public List selectList() {
return uMapper.selectList();
}
}
在resource目录下创建mybatis文件下、在该文件下创建mapper文件夹、然后在该文件夹下创建User.xml
创建controller
package com.example.demo.controller;
import com.example.demo.model.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class TesrController {
@Autowired
private CoachService coachService;
@Autowired
private UserService userService;
@RequestMapping("/hello")
public String hello() {
return "hello world3";
}
@RequestMapping("/selectList")
public List selectList() {
return userService.selectList();
}
}
最后附上启动器的代码
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.mapper")
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
项目结构图
启动项目在浏览器输入：http://localhost:8080/selectList ，如下图
