Aspose.Email  for Java

Bulk Report Generation in OST Format via Java

Generate email messages in bulk and add to OST file via .NET API.

How to Generate OST Reports Using Java

In order to create OST file reports, we’ll use

Aspose.Email for Java

API which is a feature-rich, powerful and easy to use assembly API for Java platform. You can download its latest version directly from


and install it within your Maven-based project by adding the following configurations to the pom.xml.


<name>Aspose Java API</name>
<version>version of aspose-email API</version>

Steps to Generate OST Reports via Java

  1. Create a template as MailMessage and add dynamic fields
  2. Create data source and mapping
  3. Initialize TemplateEngine using the MailMessage object
  4. Call TemplateEngine.Instantiate method to generate messages in bulk
  5. Create a new PST with PersonalStorage.Create method
  6. Add folder in PST
  7. Add messages from TemplateEngine to folder using FolderInfo.Add method
  8. Save in OST format

System Requirements

Aspose.Email for Java supports on all major platforms and Operating Systems. Please 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.

Generate Messages & Add to OST - C#

//create a new MailMessage instance as a template
MailMessage template = new MailMessage();

//add template field to subject
template.setSubject("Hello, #FirstName#");
template.setFrom(MailAddress.to_MailAddress("This email address is being protected from spambots. You need JavaScript enabled to view it."));

//add template field to receipt
template.getTo().addMailAddress(new MailAddress("#Receipt#", true));

//add template field to html body 
//use GetSignment as the template routine, which will provide the same signment.
template.setHtmlBody("Dear #FirstName# #LastName#, Thank you for your interest in Aspose.Network.Have fun with it.#GetSignature()#");

//create a new TemplateEngine with the template message.
TemplateEngine engine = new TemplateEngine(template);

//fill a DataTable as data source
DataTable dt = new DataTable();
DataRow dr;
dr = dt.newRow();
dr.set("Receipt", "Nancy.Davolio");
dr.set("FirstName", "Nancy");
dr.set("LastName", "Davolio");
dr = dt.newRow();
dr.set("Receipt", "Andrew.Fuller");
dr.set("FirstName", "Andrew");
dr.set("LastName", "Fuller");
dr = dt.newRow();
dr.set("Receipt", "Janet.Leverling");
dr.set("FirstName", "Janet");
dr.set("LastName", "Leverling");

MailMessageCollection messages;
	//create the messages from the template and datasource.
	messages = engine.instantiate(dt);
}catch (MailException ex){
	//print exception
  • About Aspose.Email for Java API

    Aspose.Email is a Microsoft Outlook and Thunderbird formats parsing solution. One can easily create, manipulate, convert email and storage formats such as MSG, EMLX, EML and MHT. Handling of email attachments, customization of message headers and implementation of different network protocols like POP3, IMAP & SMTP to send & receive emails is much easier. Its a standalone API and does not require Microsoft Outlook or any other software installation.

    Free App to Assemble OST

    Check our live demos to create OST files with following benefits.

      No need to download or setup anything
      No need to write or compile code
      Just upload OST file and hit the "Assemble" button
      Download the resultant OST file from the link

    OST What is OST File Format

    OST or Offline Storage Files represent user's mailbox data in offline mode on local machine upon registration with Exchange Server using Microsoft Outlook. It is automatically created on the first use of Microsoft Outlook upon connectivity with server. Once the file is created, the data is synchronized with the email server so that it is available offline as well in case of disconnectivity from email server. OST files can user mailbox items such as emails, contacts, calendar information, notes, tasks and other similar data. Users can create emails and other data items in OST file even in the absence of connection to the server, but these will not be synchronized with the server. Once the connection is established, the local file is synchronized with the server again so that both the server and the local copy are at the same level of information.

    Read More

    Other Supported Report Generation Formats

    Using Java, one can easily generate reports of multiple formats including.

    EML (Outlook Email Messages)
    MBOX (Electronic Mail Messages)
    MSG (Outlook & Exchange Format)
    PST (Outlook Personal Storage Files)