Assembly for Java

Java API for Automating Reports and Documents

Simplify report generation in Java by merging data with templates.

Version 24.6 released

// Path to the main template
String template = "chart_template.docx";

// Retrieve managers' productivity data from the source
DocumentTable data_table = 
    new DocumentTable("Managers.json", 1);

// Create an instance of DataSourceInfo with the data
DataSourceInfo data 
    = new DataSourceInfo(data_table, "managers");

// Set chart colors using another DataSourceInfo
DataSourceInfo design = 
    new DataSourceInfo("red", "color");

// Fill the template with data and save it to the output
DocumentAssembler asm = new DocumentAssembler();
asm.assembleDocument(template, "result.docx", data, design);

Maven XML

GroupDocs.Assembly Overview

A Java library designed for automated document creation and seamless data integration.

Merge Business Data into Templates with Java

Easily create professional reports by embedding data from JSON, XML, or other sources into pre-designed templates using GroupDocs.Assembly for Java.

Work with Embedded Objects

Automatically populate elements like tables, charts, and diagrams in documents using data from external sources.

Advanced Customization

GroupDocs.Assembly for Java offers flexible features like generating barcodes, pulling online data through URLs, and exporting output in different formats.

Platform independence

GroupDocs.Assembly for Java works seamlessly with popular operating systems, development frameworks, and package managers.

Supported file formats

GroupDocs.Assembly for Java supports a wide range of document formats.

Microsoft Office formats

Word: DOCX, DOC, DOCM, DOT, DOTX, DOTM, RTF, WordprocessingML
Excel: XLSX, XLS, XLSM, XLSB, XLTM, XLT, XLTM, XLTX, SpreadsheetML
PowerPoint: PPT, PPTX, PPTM, PPS, PPSX, PPSM, POTM, POTX

Images & Other Formats

Portable: PDF
Images: SVG, TIFF
Other office formats: ODT, OTT, OTS, ODS, ODP, OTP

Other formats

Web: HTML, MHTML
Emails: EML, MSG, EMLX
Other: EPUB, MD

Key Capabilities of GroupDocs.Assembly

Create professional documents and reports with advanced data handling.

Visual Data Elements

Add and format elements like charts, tables, images, and lists directly in your documents.

Data Transformation

Use formulas, sorting, and other tools to organize and present your data effectively.

Support for Multiple Formats

Easily work with common file types for both templates and output files.

Enhanced Template Formatting

Customize templates with numeric, alphabetic, and other advanced formatting options.

Dynamic Barcode Generation

Quickly create and insert barcode images into documents as needed.

Flexible Text Styling

Apply text transformations like uppercase, lowercase, title case, or other styles in templates.

Import External Content

Embed content from external files dynamically while generating documents.

Export in Multiple Formats

Save final documents in various file formats using specified extensions or configurations.

Dynamic Media Embedding

Insert images or other content using Base64-encoded data during document creation.

Code samples

Explore sample code for common tasks with GroupDocs.Assembly.

Create a Bulleted List in Word

Learn how to add bulleted lists to Word documents for organized data representation. This example shows how to generate a list in Word using GroupDocs.Assembly.

Create a Bulleted List in Word

// Insert this template on a document page:
// Managers' performance indicators
// . <<foreach [in products]>><<[ProductName]>>
// <</foreach>>

// Specify the template path
String template = "Bulleted List Template.docx";

// Set the output file path
String result = "Result Report.docx"

// Retrieve managers' data from a JSON source
JsonDataSource dataSource = new JsonDataSource("Report data.json");
DataSourceInfo data = new DataSourceInfo(dataSource, "managers")

// Generate the report with the filled data
DocumentAssembler assembler = new DocumentAssembler();
assembler.assembleDocument(template, result, data);

Create Pie Charts in PPTX

Use templates and XML to add pie charts to your presentations. Make your reports more engaging by including pie charts to visualize data.

Create Pie Charts in PPTX

// Add the chart title template to the presentation:
// Customers' revenue <<foreach [in customers]>> 
// <<x [CustomerName]>>

// Also include the chart data template:
// Total Order Price<<foreach [in customers]>> 
// <<x [CustomerName]>>

// Specify the chart template path
String template = "Pie Chart Template.pptx";

// Set the output file path
String result = "Result Report.pptx"

// Retrieve customers' data from an XML source
JsonDataSource dataSource = new JsonDataSource("Chart data.xml");
DataSourceInfo data = new DataSourceInfo(dataSource, "customers")

// Generate the chart and save the result
DocumentAssembler assembler = new DocumentAssembler();
assembler.assembleDocument(template, result, data);