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How to Convert PNG to PDF with Java REST API

This quick tutorial elaborates how to convert PNG to PDF with Java REST API. PNG (Portable Network Graphics) is a raster-based file format that supports lossless data compression. It was created as an improved, non-patented replacement for Graphics Interchange Format (GIF). PNG files are commonly used to store graphics for web images. They are often higher quality than GIF files and can include transparent backgrounds.

While, PDF (Portable Document Format) is a file format used to view and share documents over the internet. It is a universal file format that preserves the fonts, images, layout and graphics of any source document, regardless of the application and platform used to create it. PDFs are ideal for printing, sharing and archiving documents, making them a popular choice for businesses, governments and individuals. If you require PNG to PDF Conversion in Java Low Code API then the same can be done with the help of code given below.

Prerequisite

Steps to Convert PNG to PDF in Java REST API

  1. Set Client ID and Client Secret for the API
  2. Create an instance of ImagingAPI class with client credentials
  3. Specify input and output files
  4. Read input PNG file and upload to cloud storage
  5. Create an object of ConvertImageRequest with input and output file formats
  6. Call convertImage method to Convert PNG to PDF using REST API
  7. Save the output PDF file on local disk

Code for PNG to PDF Conversion in Java Low Code API

String ClientID = Client.getID(); //replace Client.getID() with your own client ID here
String ClientSecret = Client.getSecret(); //replace3 Client.getSecret() with your own client secret here
String APIBaseUrl="https://api.aspose.cloud";
String Local_Path = "C:/Temp/";
ImagingApi imagingApiSdk = new ImagingApi(ClientSecret, ClientID, APIBaseUrl);
// Input & output file names
String inputFileName = "PNGtoPDF.png";
String outputFileName = "PNGtoPDF.pdf";
try {
// Upload local image to Cloud Storage
File inputFile = new File(Local_Path + inputFileName);
FileInputStream inputFileStream = new FileInputStream(inputFile);
byte[] inputImageData = IOUtils.toByteArray(inputFileStream);
UploadFileRequest uploadFileRequest = new UploadFileRequest(inputFileName, inputImageData, null);
FilesUploadResult filesUploadResult = imagingApiSdk.uploadFile(uploadFileRequest);
String outputFormat = "pdf";
String remoteFolder = null; // Input file is saved at the root of the storage
String remoteStorage = null; // Cloud Storage name
ConvertImageRequest convertImageRequest = new ConvertImageRequest(inputFileName, outputFormat, remoteFolder, remoteStorage);
byte[] convertedImageData = imagingApiSdk.convertImage(convertImageRequest);
// Save exported image to local storage
FileOutputStream fileOutputStream = new FileOutputStream(Local_Path + outputFileName);
fileOutputStream.write(convertedImageData);
fileOutputStream.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
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The code snippet given in this post assists you to convert PNG to PDF with Java REST API. You just need to upload PNG file with the help of the Aspose.Imaging REST API SDK and download output PDF file to save it locally.

The above PNG to PDF Conversion can be operated with any no code or low code apps on Windows, Linux, or Mac.

Another relevant feature can be found at the following URL: How to Convert GIF to PDF with Java REST API

 

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