How to Convert ODT Files to PDF in Java
Convert Office Open Document Text File (ODT) to standard PDF, DOCX, PNG, and JPG using Java.
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Join For FreeMicrosoft has maintained its position in the spotlight for formatted document creation and editing for good reason. Its extreme ease of use and lack of a learning curve has transformed the Microsoft Office Suite into a household name for most computer users in the United States as well as globally. This is propagated further through its almost ubiquitous use in education, as students are raised and taught using these applications.
The issue that arises with these programs, however, is their operation costs. For Apple and other non-Windows-based Operating Systems, the purchasing fees for Office can be steep. This, then, creates a paywall separating potential users from programs to which they are already accustomed. As an answer this problem, Microsoft created the OpenOffice application, which is a free, opensource version of the classic Office Suite. Within this application, you can perform almost all of the same functions as Office Suite, including creating text documents like one would with Microsoft Word. These text documents can be made using OpenOffice Writer, and are formatted using the .ODT file type. While this file type can be opened and saved using OpenOffice Writer and Word, in order to convert the file to a different format such as PDF you will need to run it through a conversion process.
The following APIs will allow you to convert your ODT documents to PDF, DOCX, PNG, and JPG for use in whatever way you need. The goal of this tutorial is to provide a simple and efficient means for instantly converting your ODT files without needing to find or download any extraneous programming.
To run any of these functions, you will first need to install the SDK library. To install with Maven, you can add a Jitpack reference to the repository in pom.xml:
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<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
Then, you can add a reference to the dependency:
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<dependencies>
<dependency>
<groupId>com.github.Cloudmersive</groupId>
<artifactId>Cloudmersive.APIClient.Java</artifactId>
<version>v3.54</version>
</dependency>
</dependencies>
To install with Gradle, you can add the reference in your root build.gradle at the end of repositories:
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allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
Then, you can add the dependency in build.gradle:
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dependencies {
implementation 'com.github.Cloudmersive:Cloudmersive.APIClient.Java:v3.54'
}
The first function listed will convert an ODT to standard PDF instantly. Once you have installed the SDK as shown above, you can call the function:
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// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.ConvertDocumentApi;
ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
ConvertDocumentApi apiInstance = new ConvertDocumentApi();
File inputFile = new File("/path/to/inputfile"); // File | Input file to perform the operation on.
try {
byte[] result = apiInstance.convertDocumentOdtToPdf(inputFile);
System.out.println(result);
} catch (ApiException e) {
System.err.println("Exception when calling ConvertDocumentApi#convertDocumentOdtToPdf");
e.printStackTrace();
}
This will return a downloadable PDF file that can then be used however you need it. To ensure that this API works properly, you need to ensure certain requirements are met:
- The ODT file is valid and input correctly.
- You have input your API Key. This can be retrieved at no cost on the Cloudmersive website, providing 800 monthly calls across our API library.
As stated previously, Word can already be used to open ODT files. However, this will not convert the file to DOCX; it will remain an ODT file unless saved as different file format. You can shorten this process entirely, though, by removing the extra steps of opening the document in Word and manually saving it as a DOCX. The second API shown here will convert your ODT files to DOCX automatically without any extra work.
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// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.ConvertDocumentApi;
ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
ConvertDocumentApi apiInstance = new ConvertDocumentApi();
File inputFile = new File("/path/to/inputfile"); // File | Input file to perform the operation on.
try {
byte[] result = apiInstance.convertDocumentOdtToDocx(inputFile);
System.out.println(result);
} catch (ApiException e) {
System.err.println("Exception when calling ConvertDocumentApi#convertDocumentOdtToDocx");
e.printStackTrace();
}
Once again, this will return a downloadable file that can then be edited and shared as a DOCX document.
If you need to use your ODT document in a more stable format, converting it to an image array may be your ideal option. The following two APIs will convert your ODT document to PNG and JPG image files, respectively.
A PNG file would be most effective when creating images for online use, due to its lossless format and background transparency capabilities. Note, these files tend to be somewhat larger than the lossy JPG file format. To convert your ODT file to a PNG image array, install the SDK as shown above and call the function as shown below:
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// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.ConvertDocumentApi;
ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
ConvertDocumentApi apiInstance = new ConvertDocumentApi();
File inputFile = new File("/path/to/inputfile"); // File | Input file to perform the operation on.
try {
OdtToPngResult result = apiInstance.convertDocumentOdtToPng(inputFile);
System.out.println(result);
} catch (ApiException e) {
System.err.println("Exception when calling ConvertDocumentApi#convertDocumentOdtToPng");
e.printStackTrace();
}
This will return a URL containing the PNG image or images for download.
If you would rather use your document in a similar way to a photographic image, with better capabilities for scaling and defining image quality. As a lossy format, you can compress your JPG file to a more functional file size according to your needs. Furthermore, with this API, you can specify the JPG quality level with the lowest quality and highest compression at 1 and the highest quality and lowest compression at 100. The recommended and default value for this parameter is 75.
You can call the ODT to JPG function as shown below:
// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.ConvertDocumentApi;
ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
ConvertDocumentApi apiInstance = new ConvertDocumentApi();
File inputFile = new File("/path/to/inputfile"); // File | Input file to perform the operation on.
Integer quality = 56; // Integer | Optional; Set the JPEG quality level; lowest quality is 1 (highest compression), highest quality (lowest compression) is 100; recommended value is 75. Default value is 75.
try {
OdtToJpgResult result = apiInstance.convertDocumentOdtToJpg(inputFile, quality);
System.out.println(result);
} catch (ApiException e) {
System.err.println("Exception when calling ConvertDocumentApi#convertDocumentOdtToJpg");
e.printStackTrace();
}
This will return a downloadable file containing your image or image array.
With these functions, you can easily create high quality documents without the cost associated with Microsoft Office Suite. If you have any questions about using these APIs or inquiries concerning other API solutions, you can visit the Cloudmersive website where our team is happy to help with anything you might need.
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