Extract text from ZIP archive files Leave feedback
To extract files from ZIP archives getContainer method is used. This method returns the collection of ContainerItem objects.
Zip Entry can contain the following metadata:
| Name | Description |
|---|---|
| date | The time and date at which the file indicated by the Zip Entry was last modified. |
| crc | The 32-bit CRC (Cyclic Redundancy Check) on the contents of the Zip Entry. |
These metadata refer to a container element itself, not a document.
Here are the steps to extract an email text from Zip archives:
- Instantiate Parser object for the initial document;
- Call getContainer method and obtain collection of ContainerItem objects;
- Check if collection isn’t null (container extraction is supported for the document);
- Iterate through the collection and obtain Parser object to extract a text.
The following example shows how to extract a text from Zip archives:
// Create an instance of Parser class
try (Parser parser = new Parser(Constants.SampleZip)) {
// Extract attachments from the container
Iterable<ContainerItem> attachments = parser.getContainer();
// Check if container extraction is supported
if (attachments == null) {
System.out.println("Container extraction isn't supported");
}
// Iterate over zip entities
for (ContainerItem item : attachments) {
// Print the file path
System.out.println(item.getFilePath());
// Print metadata
for (MetadataItem metadata : item.getMetadata()) {
System.out.println(String.format("%s: %s", metadata.getName(), metadata.getValue()));
}
try {
// Create Parser object for the zip entity content
try (Parser attachmentParser = item.openParser()) {
// Extract an zip entity text
try (TextReader reader = attachmentParser.getText()) {
System.out.println(reader == null ? "No text" : reader.readToEnd());
}
}
} catch (UnsupportedDocumentFormatException ex) {
System.out.println("Isn't supported.");
}
}
}
You may easily run the code above and see the feature in action in our GitHub examples:
Along with full featured .NET library we provide simple, but powerful free Apps.
You are welcome to parse documents and extract data from PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, Emails and more with our free online Free Online Document Parser App.
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