I am trying to generate multiple labels by adding only one ZPL code with multiple labels on it, but when I input the ZPL code, it generates only the first one. Help me please
try (Scanner scanner = new Scanner(System.in)) {
System.out.println("Enter ZPL (type 'exit' to finish):");
String zpl = scanner.nextLine();
int labelIndex = 0; // Start with label index 0
while (!zpl.equalsIgnoreCase("exit")) {
// Adjust print density (8dpmm), label width (4 inches), label height (6 inches), and label index as necessary
URI uri = URI.create("https://api.labelary.com/v1/printers/8dpmm/labels/3.93701x5.90551/" + labelIndex + "/");
HttpRequest request = HttpRequest.newBuilder(uri)
.header("Accept", "application/pdf") // omit this line to get PNG images back
.POST(HttpRequest.BodyPublishers.ofString(zpl))
.build();
HttpClient client = HttpClient.newHttpClient();
HttpResponse<byte[]> response = client.send(request, HttpResponse.BodyHandlers.ofByteArray());
byte[] body = response.body();
if (response.statusCode() == 200) {
File file = new File("label_" + labelIndex + ".pdf"); // Change file name for PNG images
Files.write(file.toPath(), body);
System.out.println("Label_" + labelIndex + " created successfully.");
} else {
String errorMessage = new String(body, StandardCharsets.UTF_8);
System.out.println("Failed to create label: " + errorMessage);
}
// Read the next ZPL input
System.out.println("Enter next ZPL (type 'exit' to finish):");
zpl = scanner.nextLine();
labelIndex++; // Increment label index for the next label
}
} catch (IOException | InterruptedException e) {
throw new RuntimeException(e);
}
You're adding the index to the URL. From testing the API, even if you pass multiple ZPLs, it will only return the first one for index 0, second one for index 1 and so forth.
If you can generate just 1 file for all of the labels, simply remove the index from the URL.
If you wanna generate 1 file for each label, however, you have to either:
zpl and call this API multiple times with this quantity.Be wary of the rate limit, though. Please refer to their API documentation at https://labelary.com/service.html#limits