package com.springboot.template.service.impl;

import java.util.Map;
import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

import com.springboot.template.entity.HelloEntity;
import com.springboot.template.reposity.HelloRepository;
import com.springboot.template.service.JdbcService;

@Component
public class JdbcServerImpl implements JdbcService{
	@Autowired
	private JdbcTemplate JdbcTemplte;
	@Autowired
	private HelloRepository helloRepository;
	
	@Override
	public String queryHello() {
		try {
			Map<String, Object> data = this.JdbcTemplte.queryForMap("select * from demo.hello limit 1");
			if(data.isEmpty()) {
				return "没有发现任何数据";
			}else {
				return data.get("name").toString();
			}
		}catch(Exception e) {
			e.printStackTrace();
			return "数据库不存在记录";
		}
	}

	@Override
	public String queryHelloFromJpa() {
		Optional<HelloEntity> entity = this.helloRepository.findById(1L);
		if(entity == null) {
			return "没有找到ID=1对象";
		}else {
			return entity.get().getName();
		}
	}

}