JDBC

springboot: 2.3

maven: 3.3.9

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://172.20.201.255:3307/jdbc
    driver-class-name: com.mysql.cj.jdbc.Driver
    initialization-mode: always
    hikari:
      schema:
        - classpath:schema-all.sql

package com.example.demo.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
import java.util.Map;

@Controller
public class HelloController {

    @Autowired
    JdbcTemplate jdbcTemplate;

    @GetMapping("/query")
    @ResponseBody
    public Map<String, java.lang.Object> map(){
        List<Map<String, java.lang.Object>> list = jdbcTemplate.queryForList("SELECT * from department");
        return list.get(0);
    }
}