This page contains various examples of using the PDF to PDF API in Java. The examples are complete and fully functional. Read more about how to convert PDF to PDF in Java.
import com.pdfcrowd.*; import java.io.*; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/cover.pdf"); client.addPdfFile("/path/to/proposal.pdf"); client.addPdfFile("/path/to/price.pdf"); client.addPdfFile("/path/to/contact.pdf"); // run the conversion and write the result to a file client.convertToFile("offer.pdf"); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; public class ApiTest { public static void main(String[] args) throws Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/cover.pdf"); client.addPdfFile("/path/to/proposal.pdf"); client.addPdfFile("/path/to/price.pdf"); client.addPdfFile("/path/to/contact.pdf"); // run the conversion and store the result into the "pdf" variable byte[] pdf = client.convert(); // at this point the "pdf" variable contains PDF raw data and // can be sent in an HTTP response, saved to a file, etc. } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/cover.pdf"); client.addPdfFile("/path/to/proposal.pdf"); client.addPdfFile("/path/to/price.pdf"); client.addPdfFile("/path/to/contact.pdf"); // create an output stream for the conversion result FileOutputStream outputStream = new FileOutputStream("offer.pdf"); // run the conversion and write the result into the output stream client.convertToStream(outputStream); // close the output stream outputStream.close(); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; import java.nio.file.Files; import java.nio.file.Paths; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/cover.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/proposal.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/price.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/contact.pdf"))); // run the conversion and write the result to a file client.convertToFile("offer.pdf"); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; import java.nio.file.Files; import java.nio.file.Paths; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/cover.pdf"))); client.addPdfFile("/path/to/proposal.pdf"); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/price.pdf"))); client.addPdfFile("/path/to/contact.pdf"); // run the conversion and write the result to a file client.convertToFile("offer.pdf"); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/proposal.pdf"); client.setPageWatermark("/path/to/watermark.pdf"); // run the conversion and write the result to a file client.convertToFile("company_offer.pdf"); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/not_linearized.pdf"); client.setLinearize(true); // run the conversion and write the result to a file client.convertToFile("linearized.pdf"); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import com.pdfcrowd.*; import java.io.*; import java.nio.file.Files; import java.nio.file.Paths; public class ApiTest { public static void main(String[] args) throws IOException, Pdfcrowd.Error { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.setDebugLog(true); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/cover.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/proposal.pdf"))); // run the conversion and write the result to a file client.convertToFile("offer.pdf"); // print URL to the debug log System.out.println("Debug log url: " + client.getDebugLogUrl()); // print the number of available conversion credits in your account System.out.println("Remaining credit count: " + client.getRemainingCreditCount()); // print the number of credits consumed by the conversion System.out.println("Consumed credit count: " + client.getConsumedCreditCount()); // print the unique ID of the conversion System.out.println("Job id: " + client.getJobId()); // print the total number of pages in the output document System.out.println("Page count: " + client.getPageCount()); // print the size of the output in bytes System.out.println("Output size: " + client.getOutputSize()); } catch(Pdfcrowd.Error why) { System.err.println("Pdfcrowd Error: " + why); throw why; } catch(IOException why) { System.err.println("IO Error: " + why); throw why; } } }
import java.net.URLEncoder; import java.io.UnsupportedEncodingException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.http.ResponseEntity; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import com.pdfcrowd.*; @Controller public class DemoController { // the recommended method is POST @PostMapping("/") public ResponseEntity<byte[]> convert() throws UnsupportedEncodingException { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfFile("/path/to/cover.pdf"); client.addPdfFile("/path/to/proposal.pdf"); client.addPdfFile("/path/to/price.pdf"); client.addPdfFile("/path/to/contact.pdf"); // run the conversion and store the result into the "pdf" variable byte[] pdf = client.convert(); // set HTTP response headers HttpHeaders headers = new HttpHeaders(); headers.add("Content-Type", "application/pdf"); headers.add("Cache-Control", "max-age=0"); headers.add("Accept-Ranges", "none"); headers.add("Content-Disposition", "attachment; filename*=UTF-8''" + URLEncoder.encode("offer.pdf", "UTF-8").replace("+", "%20")); // send the result in the HTTP response return new ResponseEntity<>(pdf, headers, HttpStatus.OK); } catch(Pdfcrowd.Error why) { // send the error in the HTTP response HttpHeaders headers = new HttpHeaders(); headers.add("Content-Type", "text/plain"); String msg = String.format("Pdfcrowd Error: %d - %s", why.getCode(), why.getMessage()); return new ResponseEntity<>(msg.getBytes(), headers, HttpStatus.BAD_REQUEST); } } }
import java.net.URLEncoder; import java.io.UnsupportedEncodingException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.http.ResponseEntity; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import com.pdfcrowd.*; import java.nio.file.Files; import java.nio.file.Paths; import java.io.IOException; @Controller public class DemoController { // the recommended method is POST @PostMapping("/") public ResponseEntity<byte[]> convert() throws IOException, UnsupportedEncodingException { try { // create the API client instance Pdfcrowd.PdfToPdfClient client = new Pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/cover.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/proposal.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/price.pdf"))); client.addPdfRawData(Files.readAllBytes(Paths.get("/path/to/contact.pdf"))); // run the conversion and store the result into the "pdf" variable byte[] pdf = client.convert(); // set HTTP response headers HttpHeaders headers = new HttpHeaders(); headers.add("Content-Type", "application/pdf"); headers.add("Cache-Control", "max-age=0"); headers.add("Accept-Ranges", "none"); headers.add("Content-Disposition", "attachment; filename*=UTF-8''" + URLEncoder.encode("offer.pdf", "UTF-8").replace("+", "%20")); // send the result in the HTTP response return new ResponseEntity<>(pdf, headers, HttpStatus.OK); } catch(Pdfcrowd.Error why) { // send the error in the HTTP response HttpHeaders headers = new HttpHeaders(); headers.add("Content-Type", "text/plain"); String msg = String.format("Pdfcrowd Error: %d - %s", why.getCode(), why.getMessage()); return new ResponseEntity<>(msg.getBytes(), headers, HttpStatus.BAD_REQUEST); } } }