springboot整合JDBC

package com.qf.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Map;

@RestController
public class JDBCController {

    @Autowired
    JdbcTemplate jdbcTemplate;


    //查询数据库的所有信息
    //没有实体类，数据库的东西怎么获取？Map
    @GetMapping("/userlist")
    public List<Map<String,Object>> userList(){
            String sql="select * from test.api_time_cost";
        List<Map<String, Object>> maps = jdbcTemplate.queryForList(sql);

        return maps;



    }

}

#配置数据源
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    username: "root"
    password: "2001"
    url: jdbc:mysql://localhost:3306/test?useSSL=true&useUnicode=true&characterEncoding=utf8