#37 java: daum book search api

java/api/src/main/java/kr/book/search/Book.java

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+package kr.book.search;
+
+public class Book {
+
+    private String title;
+    private String authors;
+    private String publisher;
+    private String thumbnail;
+
+    public Book() {
+    }
+
+    public Book(String title, String authors, String publisher, String thumbnail) {
+        this.title = title;
+        this.authors = authors;
+        this.publisher = publisher;
+        this.thumbnail = thumbnail;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getAuthors() {
+        return authors;
+    }
+
+    public void setAuthors(String authors) {
+        this.authors = authors;
+    }
+
+    public String getPublisher() {
+        return publisher;
+    }
+
+    public void setPublisher(String publisher) {
+        this.publisher = publisher;
+    }
+
+    public String getThumbnail() {
+        return thumbnail;
+    }
+
+    public void setThumbnail(String thumbnail) {
+        this.thumbnail = thumbnail;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "title='" + title + '\'' +
+                ", author='" + authors + '\'' +
+                ", publisher='" + publisher + '\'' +
+                ", thumbnail='" + thumbnail + '\'' +
+                '}';
+    }
+}

java/api/src/main/java/kr/book/search/BookSearchMain.java

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+package kr.book.search;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Scanner;
+
+public class BookSearchMain {
+
+    public static void main(String[] args) {
+        final String apiKey = args[0];
+        KakaoBookApi.setApiKey(apiKey);
+
+        try {
+            Scanner scanner = new Scanner(System.in);
+            System.out.print("도서 제목을 입력하세요: ");
+            String title = scanner.nextLine();
+
+            List<Book> books = KakaoBookApi.searchBooks(title);
+
+            if (books.isEmpty()) {
+                System.out.println("검색 결과가 없습니다.");
+            } else {
+                String filename = "도서목록.pdf";
+                PdfGenerator.generateBookListPdf(books, filename);
+                System.out.println(filename + " 파일이 생성되었습니다.");
+            }
+        } catch (IOException e) {
+            System.err.println("에러가 발생하였습니다: " + e.getMessage());
+        }
+    }
+}

java/api/src/main/java/kr/book/search/KakaoBookApi.java

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+package kr.book.search;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class KakaoBookApi {
+
+    private static String API_KEY = "";
+
+    private static final String API_BASE_URL = "https://dapi.kakao.com/v3/search/book";
+    private static final OkHttpClient client = new OkHttpClient();
+    private static final Gson gson = new Gson();
+
+    public static void setApiKey(String apiKey) {
+        API_KEY = apiKey;
+    }
+
+    public static List<Book> searchBooks(String title) throws IOException {
+        HttpUrl.Builder urlBuilder = HttpUrl.parse(API_BASE_URL).newBuilder();
+        urlBuilder.addQueryParameter("query", title);
+
+        Request request = new Request.Builder()
+                .url(urlBuilder.build())
+                .addHeader("Authorization", "KakaoAK " + API_KEY)
+                .build();
+
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful()) {
+                throw new IOException("Request failed: " + response);
+            }
+
+            JsonObject jsonResponse = gson.fromJson(response.body().charStream(), JsonObject.class);
+            JsonArray documents = jsonResponse.getAsJsonArray("documents");
+
+            List<Book> books = new ArrayList<>();
+
+            for (JsonElement document : documents) {
+                JsonObject bookJson = document.getAsJsonObject();
+                Book book = new Book(
+                        bookJson.get("title").getAsString(),
+                        bookJson.get("authors").getAsString(),
+                        bookJson.get("publisher").getAsString(),
+                        bookJson.get("thumbnail").getAsString()
+                );
+                books.add(book);
+            }
+            return books;
+        }
+    }
+}

java/api/src/main/java/kr/book/search/PdfGenerator.java

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+package kr.book.search;
+
+import com.itextpdf.io.font.PdfEncodings;
+import com.itextpdf.io.image.ImageData;
+import com.itextpdf.io.image.ImageDataFactory;
+import com.itextpdf.kernel.colors.ColorConstants;
+import com.itextpdf.kernel.font.PdfFont;
+import com.itextpdf.kernel.font.PdfFontFactory;
+import com.itextpdf.kernel.pdf.PdfDocument;
+import com.itextpdf.kernel.pdf.PdfWriter;
+import com.itextpdf.layout.Document;
+import com.itextpdf.layout.element.Cell;
+import com.itextpdf.layout.element.Image;
+import com.itextpdf.layout.element.Paragraph;
+import com.itextpdf.layout.element.Table;
+import com.itextpdf.layout.properties.TextAlignment;
+import com.itextpdf.layout.properties.UnitValue;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.List;
+
+public class PdfGenerator {
+
+    public static void generateBookListPdf(List<Book> books, String filename) throws FileNotFoundException {
+        PdfWriter pdfWriter = new PdfWriter(filename);
+        PdfDocument pdf = new PdfDocument(pdfWriter);
+        Document document = new Document(pdf);
+        document.setFontSize(12);
+
+        PdfFont font;
+
+        try {
+            font = PdfFontFactory.createFont("NanumGothicLight.ttf", PdfEncodings.IDENTITY_H, PdfFontFactory.EmbeddingStrategy.FORCE_EMBEDDED);
+            document.setFont(font);
+
+            Paragraph titleParagraph = new Paragraph("도서 목록");
+            titleParagraph.setFontSize(24);
+            titleParagraph.setTextAlignment(TextAlignment.CENTER);
+            titleParagraph.setBold();
+            document.add(titleParagraph);
+
+            Table table = new Table(UnitValue.createPercentArray(new float[]{2, 2, 2, 2}));
+            table.setWidth(UnitValue.createPercentValue(100));
+            table.setMarginTop(20);
+
+            table.addHeaderCell(createCell("제목", true));
+            table.addHeaderCell(createCell("저자", true));
+            table.addHeaderCell(createCell("출판사", true));
+            table.addHeaderCell(createCell("이미지", true));
+
+            for (Book book : books) {
+                table.addCell(createCell(book.getTitle(), false));
+                table.addCell(createCell(book.getAuthors(), false));
+                table.addCell(createCell(book.getPublisher(), false));
+
+                try {
+                    ImageData imageData = ImageDataFactory.create(book.getThumbnail());
+                    Image image = new Image(imageData);
+                    image.setAutoScale(true);
+                    table.addCell(new Cell().add(image).setPadding(5));
+                } catch (Exception e) {
+                    table.addCell(createCell("이미지 불러오기 실패", false));
+                }
+            }
+
+            document.add(table);
+            document.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static Cell createCell(String content, boolean isHeader) {
+        Paragraph paragraph = new Paragraph(content);
+        Cell cell = new Cell().add(paragraph);
+        cell.setPadding(5);
+
+        if (isHeader) {
+            cell.setBackgroundColor(ColorConstants.LIGHT_GRAY);
+            cell.setFontSize(14);
+            cell.setBold();
+        }
+        return cell;
+    }
+}