This article walks through creating a SpringBoot‑based electronic document signing and contract system, covering the problem background, project structure, Maven setup, key controller and service code, utility classes, deployment steps, and a step‑by‑step demo of drafting, approval, sealing and signing workflows.
Facing intense retail banking competition, China Postal Savings Bank overhauled its mobile credit‑card application flow—reducing steps from 17 to a single page, cutting processing time from 20 minutes to under 5 minutes, and leveraging intelligent image recognition, streamlined e‑signatures, and group‑submission features to dramatically improve efficiency and customer experience.
This tutorial explains China’s electronic‑seal regulations, shows how to generate a CA‑based X.509 certificate and a custom seal image with BouncyCastle, and demonstrates signing a PDF in Java using iText 5 to embed a visible seal and a verifiable digital signature.
This article explains how to build a front‑end electronic signature feature that merges a signature canvas with an HTML‑rendered document into a single preview image using SignaturePad, html2canvas, and merge-images, including code snippets and scaling adjustments.
