Exemplo de Java

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Converter PDF para ZPL usando Java

Este exemplo carrega o arquivo label.pdf no diretório atual, converte-o para Base64 e o envia ao servidor da API.

A API devolve a etiqueta ZPL no corpo da resposta. Em seguida, o resultado é escrito no console e também salvo no arquivo local java-html-to-zpl-example.zpl.

import java.net.HttpURLConnection;
import java.net.URL;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.ByteArrayOutputStream;
import java.util.Base64;
import java.nio.file.Files;
import java.nio.file.Paths;

public class PDFtoZPLJava {

    public static void main(String[] args) throws Exception {

        // String API_KEY = "API_KEY"; /* Get from: https://rapidapi.com/dablabs/api/html-to-zpl */

        // Load label.pdf and convert to base64
        byte[] pdfBytes = Files.readAllBytes(Paths.get("label.pdf"));
        String pdfBase64 = Base64.getEncoder().encodeToString(pdfBytes);

        // Raw JSON string:
        // In production code you should use a JSON library
        String json = "{\"width\":4, \"height\":6, \"pages\":\"all\", \"pdfBase64\":\"" + pdfBase64 + "\"}";

        URL url = new URL("https://html-to-zpl.p.rapidapi.com/pdf2zpl");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setRequestProperty("x-rapidapi-key", API_KEY);
        conn.setRequestProperty("content-type", "application/json");
        conn.setDoOutput(true);

        // Send JSON body
        try (OutputStream os = conn.getOutputStream()) {
            byte[] input = json.getBytes("UTF-8");
            os.write(input);
        }

        // Read response body
        int responseCode = conn.getResponseCode();
        InputStream responseStream = (responseCode >= 200 && responseCode < 300)
                ? conn.getInputStream()
                : conn.getErrorStream();

        String str = "";
        if (responseStream != null) {
            try (InputStream is = responseStream;
                 ByteArrayOutputStream baos = new ByteArrayOutputStream()) {

                byte[] buffer = new byte[8192];
                int len;
                while ((len = is.read(buffer)) != -1) {
                    baos.write(buffer, 0, len);
                }
                str = new String(baos.toByteArray(), "UTF-8");
            }
        }

        System.out.println(str);

        System.out.println("Writing ZPL to java-html-to-zpl-example.zpl");
        BufferedWriter writer = new BufferedWriter(new FileWriter("java-html-to-zpl-example.zpl"));
        writer.write(str.toCharArray());
        writer.close();

        conn.disconnect();
    }
}

Converter HTML para ZPL usando Java

import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpRequest.BodyPublishers;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.URI;
import java.net.URLEncoder;
import java.io.BufferedWriter;
import java.io.FileWriter;

class HTMLtoZPLJava {

    public static void main(String[] args) throws Exception {

        // String API_KEY = "API_KEY"; /* Get from: https://rapidapi.com/dablabs/api/html-to-zpl */ 

        String width = "4"; // inches
        String height = "2"; // inches
        String html = "<h1 style=\"font-size:40pt;margin:0.5in\">Hello World!</h1>";
               html +="<p style=\"font-size:25pt;margin:0.8in\">ZPL label generated by <u>htmltozpl.com</u></p>";

        String urlEncodedHtml = URLEncoder.encode(html, "UTF-8");

        String data = "width=" + width + "&height=" + height + "&html=" + urlEncodedHtml;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder(
                URI.create("https://html-to-zpl.p.rapidapi.com/html2zpl"))
                .header("x-rapidapi-key", API_KEY)
                .header("content-type", "application/x-www-form-urlencoded")
                .POST(BodyPublishers.ofString(data))
                .build();

        HttpResponse<String> response = client.send(request, BodyHandlers.ofString());

        String zpl = response.body().toString();

        // Write to console
        System.out.println(zpl);

        // Write to file
        BufferedWriter writer = new BufferedWriter(new FileWriter("java-html-to-zpl-example.zpl"));
        writer.write(zpl.toCharArray());
        writer.close();
    }

}