OST to HTML Converter for Java Applications
Intuitive Java API to convert email files between formats. OST to HTML conversion code sample and its integration with Java projects.
Aspose.Email for Java
Overview
Convert OST to HTML using Java API
Aspose.Email for Java provides an efficient and reliable solution for converting email files between various formats. It simplifies the process of email format conversion by providing a straightforward and efficient API. Try the concise and straightforward code sample that demonstrates the ease and efficiency of the email format conversion process. The code represents classes and methods for creating objects and manipulating them enabling developers to handle email data with ease and precision and achieve reliable and accurate results.
With the Java API, you don’t have to worry about complex algorithms or tedious manual work, saving time and effort for more important tasks to take your email processing applications to the next level.
How to Install Aspose.Email for Java Library
To start utilizing the capabilities of the powerful and feature-rich Java API is easy with one of the following actions:
download its latest version from Maven
install it within your Maven-based project by adding the following configurations to the pom.xml.
<repository>
<id>AsposeJavaAPI</id>
<name>Aspose Java API</name>
<url>https://repository.aspose.com/repo/</url>
</repository>
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-email</artifactId>
<version>version of aspose-email API</version>
<classifier>jdk17</classifier>
</dependency>
In case of difficulties or questions regarding the installation process of the API, please visit the Installation section of our documentation .
How to Convert OST Files to HTML Format
Converting OST (Outlook Offline Storage Table) files to HTML format with Aspose.Email for .NET provides a straightforward solution for managing email data efficiently. Aspose.Email intuitive API empowers developers to easily parse OST files, extract email content, and convert it into HTML format. This process retains the email original layout, attachments, and metadata, ensuring a smooth transition. By utilizing Aspose.Email reliable conversion tools, developers can seamlessly incorporate OST to HTML conversion functionality into their applications. This enables enhanced interoperability and data portability across various email platforms and systems, facilitating streamlined email management workflows.
To convert OST files to HTML format, the library offers the PersonalStorage class which is used to open a storage file, allowing access to its content and structure. The FolderInfo class represents a folder within the storage file and makes it possible to manipulate its content. The MapiMessage class provides developers with a comprehensive set of functionalities to work with email messages programmatically, enabling them to efficiently manage, manipulate, and interact with email data within their Java applications. With the HtmlSaveOptions class, you can configure how the email message should be saved as an HTML file using options, such as setting resource rendering mode and relative paths to resources. The ResourceRenderingMode enum class specifies different resource rendering modes when saving an email message in HTML format. Its purpose is to define how resources (such as images) in the email message should be handled when saving to an HTML file. The code sample below demonstrates the work of these classes in loading the OST file, extracting email messages from it, converting the messages to HTML format, and saving them as individual HTML files with appropriate resource handling options. For more information about the API high code features, please visit our reference resources .
Steps to Convert OST to HTML via Java
Java programmers can easily convert OST file to HTML in just a few lines of code.
- Load the OST file from the specified file path using the PersonalStorage.fromFile method and create a PersonalStorage object to access its content.
- Check if the output directory exists, and if not, create it using the specified output directory path.
- Retrieve the Inbox folder from the Outlook OST file by getting the subfolder with the name “Inbox” from the root folder.
- Iterate through each MapiMessage object within the Inbox folder.
- Save each email message as an HTML file in the output directory, with the filename based on a counter (Message1.html, Message2.html, etc.).
- Configure the HTML save options to set resource rendering mode to save to file and to use relative paths to resources within the saved HTML file.
- Save the MapiMessage as an HTML file with the specified HTML save options and the file path calculated earlier.
System Requirements
Before running the Java conversion code, make sure that you have the following prerequisites.
- Microsoft Windows or a compatible OS with Java Runtime Environment for JSP/JSF Application and Desktop Applications.
- Get latest version of Aspose.Email for Java directly from Maven .
Convert OST to HTML - Java
// Open the OST file
PersonalStorage ost = PersonalStorage.fromFile(ostFilePath);
// Ensure the output directory exists
new File(outputDirectory).mkdirs();
// Get the Inbox folder from OST
FolderInfo inbox = ost.getRootFolder().getSubFolder("Inbox");
// Iterate through OST messages and save them as .html files
int count = 1;
for (MapiMessage msg : inbox.enumerateMapiMessages()) {
// Save each message as .html file
String htmlFilePath = outputDirectory + File.separator + "Message" + count + ".html";
HtmlSaveOptions htmlSaveOptions = new HtmlSaveOptions();
htmlSaveOptions.setResourceRenderingMode(ResourceRenderingMode.SaveToFile);
htmlSaveOptions.setUseRelativePathToResources(true);
msg.save(htmlFilePath, htmlSaveOptions);
System.out.println("Message " + count + " saved as: " + htmlFilePath);
count++;
}
What is OST File Format?
OST (Offline Storage Table) file format is a file that stores a copy of mailbox items from an Exchange server, allowing users to access their mailbox data even when they are offline. OST files are synchronized with the Exchange server when a connection is established, ensuring that any changes made offline are updated on the server as well. OST files are used by Microsoft Outlook for email, contacts, calendars, tasks, and other mailbox items in an Exchange environment.
What is HTML File Format?
HTML (Hypertext Markup Language) is a standard language used to create and format documents on the web. HTML files contain code that defines the structure and content of a web page, including text, images, links, and other elements. By using tags enclosed in angle brackets, web developers can create visually appealing and interactive web pages that can be displayed in web browsers. HTML files are saved with a “.html” or “.htm” extension and can be opened in any web browser. With the ability to combine HTML with CSS and JavaScript, developers can design dynamic and responsive websites for a better user experience.
File Format Conversions supported by Aspose.Email for Java
Aspose.Email for Java offers an extensive set of file format conversions designed to seamlessly handle emails, contacts, calendars, attachments. It empowers developers to effortlessly manipulate and transform data to meet the diverse needs of their applications. Implementing file format conversions in email applications facilitates their interoperability and elevates efficiency. Overall, the library supports conversion from EML , EMLX , ICS , MBOX , MHTML , MSG , OFT , OLM , OST , PST , VCF to other formats elevating user experience.OST to HTML Conversion Live Demos
Other Supported Conversions
You can also convert OST into many other file formats including few listed below.