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[황성현] LLM 날씨 조회 제출합니다. #14

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[황성현] LLM 날씨 조회 제출합니다. #14

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21a7a7d
shhwang221212
shhwang221212 Dec 15, 2025
d6c7e5b
LLM 날씨 조회 제출합니다.
shhwang221212 Dec 16, 2025
d62c45a
LLM 날씨 조회 제출합니다.
shhwang221212 Dec 16, 2025
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23 changes: 22 additions & 1 deletion README.md
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# spring-sunshine-precourse
# spring-sunshine-precourse


## getCoordinatesByCityName(enum city)
도시 이름을 넣으면 위도와 경도를 반환하는 메소드
output: coordinate double DTO

## ???
시/군, 구, 동 까지 볼 수 있는 어쩌고 저쩌고

## getWeatherByCoordinates(double latitude, double longitude)
위도와 경도를 넣으면 위치에 해당하는 온도, 습도, 체감온도, 날씨코드, 요약을 반환하는 메소드
output: current.temperature_2m, relative_humedity_2m, apperent_temperature, weather_code, summary DTO

## getSummaryByInfo(current.temperature_2m, relative_humedity_2m, apperent_temperature, weather_code)
온도, 습도, 체감온도, 날씨코드로 요약을 생성하여 반환하는 메소드
output: summary string

## getDescriptionByWeatherCode(int weather_code)
날씨코드와 매핑되는 설명을 반환하는 메소드
output: string

13 changes: 11 additions & 2 deletions build.gradle.kts
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plugins {
id("org.springframework.boot") version "3.3.1"
id("io.spring.dependency-management") version "1.1.5"
id("org.springframework.boot") version "3.5.8"
id("io.spring.dependency-management") version "1.1.7"
kotlin("plugin.jpa") version "1.9.24"
kotlin("jvm") version "1.9.24"
kotlin("plugin.spring") version "1.9.24"
Expand Down Expand Up @@ -28,11 +28,20 @@ dependencies {
implementation("org.flywaydb:flyway-core")
implementation("org.flywaydb:flyway-mysql")
implementation("org.jetbrains.kotlin:kotlin-reflect")
implementation(platform("org.springframework.ai:spring-ai-bom:1.1.2"))
implementation("org.springframework.ai:spring-ai-starter-model-google-genai")
implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
runtimeOnly("com.h2database:h2")
runtimeOnly("com.mysql:mysql-connector-j")
testImplementation("org.springframework.boot:spring-boot-starter-test")
testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
testRuntimeOnly("org.junit.platform:junit-platform-launcher")
compileOnly("org.projectlombok:lombok:1.18.30")
annotationProcessor("org.projectlombok:lombok:1.18.30")

testCompileOnly("org.projectlombok:lombok:1.18.30")
testAnnotationProcessor("org.projectlombok:lombok:1.18.30")

}

kotlin {
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5 changes: 5 additions & 0 deletions src/main/java/study/AddDaysRequest.java
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package study;

public record AddDaysRequest(int days) {

}
11 changes: 11 additions & 0 deletions src/main/java/study/Application.java
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//package study;
//
//import org.springframework.boot.SpringApplication;
//import org.springframework.boot.autoconfigure.SpringBootApplication;
//
//@SpringBootApplication
//public class Application {
// public static void main(String[] args) {
// SpringApplication.run(Application.class, args);
// }
//}
5 changes: 5 additions & 0 deletions src/main/java/study/DateResponse.java
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package study;

public record DateResponse(String day) {

}
22 changes: 22 additions & 0 deletions src/main/java/study/Functions.java
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package study;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.ai.tool.annotation.Tool;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Description;

import java.time.LocalDate;
import java.util.function.Function;

@Configuration
public class Functions {

@Tool(description = "Calculate a date after adding days from today")
public DateResponse addDaysFromToday(AddDaysRequest request) {
var result = LocalDate.now().plusDays(request.days());
return new DateResponse(result.toString());

}
}
64 changes: 64 additions & 0 deletions src/main/java/study/JokeController.java
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package study;

import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.chat.messages.UserMessage;
import org.springframework.ai.chat.model.ChatResponse;
import org.springframework.ai.chat.prompt.Prompt;
import org.springframework.ai.chat.prompt.PromptTemplate;
import org.springframework.ai.chat.prompt.SystemPromptTemplate;
import org.springframework.ai.converter.BeanOutputConverter;
import org.springframework.ai.template.TemplateRenderer;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

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

@RestController
public class JokeController {
private final ChatClient client;

public JokeController(ChatClient.Builder builder) {
this.client = builder.build();
}




@GetMapping("/addDays")
public String addDays(
@RequestParam(defaultValue = "0") int days
) {
var template = new PromptTemplate("오늘 기준으로 {days}일 뒤 날짜를 알려줘.");
var prompt = template.render(Map.of("days", days));
return client.prompt(prompt)
.tools(new Functions())
.call()
.content();
}



@GetMapping("/joke")
public ChatResponse joke(
@RequestParam(defaultValue = "HWANG SEONGHYUN") String name,
@RequestParam(defaultValue = "pirate") String voice
) {
var user = new UserMessage("""
Tell me about three famous pirates from the Golden Age of Piracy and what they did.
Write at least one sentence for each pirate.
"""
);
var template = new SystemPromptTemplate("""
You are a helpful AI assistant.
You are an AI assistant that helps people find information.
Your name is {name}.
You should reply to the user's request using your name and in the style of a {voice}.
"""
);
var system = template.createMessage(Map.of("name", name, "voice", voice));
var prompt = new Prompt(user, system);
return client.prompt(prompt).call().chatResponse();
}
}
11 changes: 11 additions & 0 deletions src/main/java/sunshine/Current.java
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package sunshine;


import com.fasterxml.jackson.annotation.JsonProperty;

public record Current(
@JsonProperty("temperature_2m") double temperature2m,
@JsonProperty("relative_humidity_2m") double relativeHumidity2m,
@JsonProperty("apparent_temperature") double apparentTemperature,
@JsonProperty("weather_code") int weatherCode
) {}
15 changes: 15 additions & 0 deletions src/main/java/sunshine/HttpClientConfig.java
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package sunshine;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestClient;

@Configuration
public class HttpClientConfig {
@Bean
RestClient restClient(RestClient.Builder builder) {
return builder.build();
}
}
4 changes: 4 additions & 0 deletions src/main/java/sunshine/LatLngDto.java
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package sunshine;

public record LatLngDto(double lat, double lng) {
}
8 changes: 8 additions & 0 deletions src/main/java/sunshine/OutfitRecommendationController.java
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package sunshine;

import org.springframework.stereotype.Controller;

@Controller
public class OutfitRecommendationController {

}
11 changes: 11 additions & 0 deletions src/main/java/sunshine/WeatherApiResponseDto.java
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package sunshine;

import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.Data;

public record WeatherApiResponseDto(
double latitude,
double longitude,
@JsonProperty("current")
Current current
) {}
106 changes: 106 additions & 0 deletions src/main/java/sunshine/WeatherQueryController.java
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package sunshine;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.chat.prompt.PromptTemplate;
import org.springframework.ai.converter.BeanOutputConverter;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestClient;
import study.Functions;

import java.util.Map;

@RestController
public class WeatherQueryController {
private final ChatClient client;
private final RestClient httpClient;
private static final Logger log = LoggerFactory.getLogger(WeatherQueryController.class);

public WeatherQueryController(ChatClient.Builder builder, RestClient httpClient) {
this.client = builder.build();
this.httpClient = httpClient;
}

@GetMapping("/getLatLngDto")
public String getLatLngDto(@RequestParam(defaultValue = "서울시 강서구") String city) {

var beanOutputConverter = new BeanOutputConverter<>(LatLngDto.class);
var format = beanOutputConverter.getFormat();

var user = """
{city}의 위도와 경도 알려줘. 답변 양식은 {format}으로 알려줘야해.;
""";
var prompt = new PromptTemplate(user).create(Map.of("city", city, "format", format));

try {
// ✅ ChatResponse를 명시적으로 받기 (메타데이터/토큰/ID 로깅용)
var chatResponse = client.prompt(prompt)
.call()
.chatResponse();

var metadata = chatResponse.getMetadata(); // ChatResponseMetadata :contentReference[oaicite:1]{index=1}
var usage = metadata.getUsage(); // Usage :contentReference[oaicite:2]{index=2}

// ✅ 호출 ID + 토큰 사용량 로그
log.info("llm.call id={} model={} promptTokens={} totalTokens={}",
metadata.getId(),
metadata.getModel(),
usage.getPromptTokens(),
usage.getTotalTokens()
);

// 기존 로직: content를 꺼내서 변환
String content = chatResponse.getResult().getOutput().getText(); // 또는 너가 쓰던 result.content() 방식
LatLngDto convert = beanOutputConverter.convert(content);

WeatherApiResponseDto weatherByCoordinates = getWeatherByCoordinates(convert);
log.info("weather={}", weatherByCoordinates);

return recommendOutfit(weatherByCoordinates);

} catch (Exception e) {
log.info("llm.call failureType={}", e.getClass().getSimpleName(), e);
return null;
}
}

public WeatherApiResponseDto getWeatherByCoordinates(LatLngDto latLngDto) {
RestClient.RequestHeadersSpec<?> uri = httpClient.get()
.uri(uriBuilder -> uriBuilder
.scheme("https")
.host("api.open-meteo.com")
.path("/v1/forecast")
.queryParam("latitude", latLngDto.lat())
.queryParam("longitude", latLngDto.lng())
.queryParam("current",
"temperature_2m,relative_humidity_2m,apparent_temperature,weather_code")
.build());

log.info(uri.retrieve().body(WeatherApiResponseDto.class).toString());
return uri.retrieve().body(WeatherApiResponseDto.class);
}

public String recommendOutfit(WeatherApiResponseDto weatherinfo) {
var template = """
기온은 {temperature} 이고,
습도는 {relativeHumidity} 이고,
체감온도는 {apparentTemperature} 이고,
날씨코드는 {weatherCode} 야.5
이 데이터에 맞는 옷차림을 추천해줘.
""";

var prompt = new PromptTemplate(template).create(Map.of("temperature", weatherinfo.current().temperature2m(),
"relativeHumidity", weatherinfo.current().relativeHumidity2m(),
"apparentTemperature", weatherinfo.current().apparentTemperature(),
"weatherCode", weatherinfo.current().weatherCode()));

ChatClient.CallResponseSpec call = client.prompt(prompt).call();
log.info(call.toString());

return call.content();
}
}
4 changes: 4 additions & 0 deletions src/main/java/sunshine/WeatherSummaryController.java
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package sunshine;

public class WeatherSummaryController {
}
2 changes: 2 additions & 0 deletions src/main/resources/application.properties
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spring.application.name=spring-sunshine
spring.ai.google.genai.api-key=YOUR_API_KEY_HERE
spring.ai.google.genai.chat.options.model=gemini-2.5-flash-lite