feat: book search api

책 정보 가져오는 API 기능 구현 (XML -> JSON)
book search api #1

build.gradle

@@ -38,6 +38,9 @@ dependencies {
 	//annotationProcessor "com.querydsl:querydsl-apt:5.0.0:jakarta"
 	annotationProcessor "jakarta.annotation:jakarta.annotation-api"
 	annotationProcessor "jakarta.persistence:jakarta.persistence-api"
+
+	//json in java
+	implementation group: 'org.json', name: 'json', version: '20230227'
 }
 
 tasks.named('test') {

src/main/java/capstone/bookdiary/config/RestTemplateConfig.java

@@ -0,0 +1,13 @@
+package capstone.bookdiary.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+}

src/main/java/capstone/bookdiary/controller/BookController.java

@@ -0,0 +1,22 @@
+package capstone.bookdiary.controller;
+
+import capstone.bookdiary.service.BookService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api")
+@RequiredArgsConstructor
+
+public class BookController {
+    private final BookService bookService;
+
+
+    @GetMapping("/search/{title}")
+    public void searchBook(@PathVariable String title){
+        bookService.searchBook(title);
+    }
+}

src/main/java/capstone/bookdiary/service/BookService.java

@@ -0,0 +1,37 @@
+package capstone.bookdiary.service;
+
+import capstone.util.XmlToJson;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
+
+@Service
+public class BookService {
+    @Value("${api-key.library}")
+    private String libraryKey;
+    @Autowired
+    private RestTemplate restTemplate;
+
+
+    //TODO: 도서 검색 외부 api 요청
+
+    public void searchBook(String title){
+        String bookSearchApiUrl = "http://data4library.kr/api/srchBooks?authKey="+libraryKey+"&title="+title;
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_JSON);
+
+        HttpEntity<String> entity = new HttpEntity<>(headers);
+
+        ResponseEntity<String> exchange = restTemplate.exchange(bookSearchApiUrl, HttpMethod.GET, entity, String.class);
+        XmlToJson.xmlToJson(exchange.getBody());
+
+    }
+    //TODO: 도서 세부 정보 외부 api 요청
+}

src/main/java/capstone/util/XmlToJson.java

@@ -0,0 +1,21 @@
+package capstone.util;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.json.JSONObject;
+import org.json.XML;
+
+public class XmlToJson {
+    public static void xmlToJson(String xmlString){
+        try{
+            JSONObject jsonObject = XML.toJSONObject(xmlString);
+            ObjectMapper mapper = new ObjectMapper();
+            mapper.enable(SerializationFeature.INDENT_OUTPUT);
+            Object json = mapper.readValue(jsonObject.toString(), Object.class);
+            String output = mapper.writeValueAsString(json);
+            System.out.println(output);
+        }catch (Exception e){
+            e.printStackTrace();
+        }
+    }
+}