Java Example

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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-host", "html-to-zpl.p.rapidapi.com")
                .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 Conosle
        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();
    }

}