JasperReports Introduction

What is JasperReports?

JasperReports is the open source Java reporting engine behind countless invoices, payslips and MIS reports. You design a template once (.jrxml), compile it to .jasper, fill it with data, and export to PDF, Excel, HTML or CSV.

Core Concepts

• JRXML — the XML report template you design.
• Bands — horizontal sections (title, column header, detail, footer) that repeat per record.
• Fields ($F{...}) — values from the data source.
• Parameters ($P{...}) — inputs you pass at fill time.
• Variables ($V{...}) — computed values like page numbers and running totals.