jte
A secure and lightweight template engine for Java and Kotlin with intuitive syntax and blazing fast performance.
What is jte?
jte is a secure and lightweight template engine for Java and Kotlin that allows developers to write templates using familiar Java or Kotlin syntax. It solves the problem of complex template languages by minimizing new keywords and leveraging existing language features, while ensuring security through compile-time HTML escaping and delivering high performance.
Java and Kotlin developers building web applications who need a secure, performant, and intuitive template engine with strong IDE support.
Developers choose jte for its seamless integration with Java and Kotlin ecosystems, robust security features like compile-time HTML escaping, and exceptional performance, all while maintaining an easy-to-learn syntax and excellent tooling support.
Overview
Secure and speedy templates for Java and Kotlin.
Use Cases
Best For
- Building secure web applications with automatic XSS protection
- Java or Kotlin projects needing high-performance server-side rendering
- Teams using IntelliJ IDEA who want full IDE support for templates
- Developers who prefer writing templates in plain Java/Kotlin syntax
- Projects requiring hot reloading for rapid template development
- Applications that integrate with frameworks like Spring Boot, Javalin, or Ktor
Not Ideal For
- Projects heavily reliant on client-side frameworks like React or Vue.js, as jte is server-side focused and lacks native integration for frontend rendering.
- Teams using IDEs other than IntelliJ IDEA, since full completion and refactoring support is exclusive to the IntelliJ plugin.
- Applications needing out-of-the-box, pre-styled UI components or themes, because jte is unstyled and requires custom CSS/HTML work.
- Environments where compile-time template processing is infeasible, such as in highly dynamic or runtime-generated content scenarios.
Pros & Cons
Pros
Uses plain Java or Kotlin for expressions, eliminating the need to learn a separate template language, making templates intuitive and easy to maintain, as highlighted in the README.
Implements context-sensitive HTML escaping at compile time, automatically preventing XSS vulnerabilities without runtime overhead, ensuring security by default.
The IntelliJ plugin offers full completion and refactoring support for both Java parts and jte keywords, enhancing productivity with features demonstrated in the README's GIF.
Optimized for blazing fast execution, with independent benchmarks linked in the README showing it outperforms many other template engines in speed.
Supports hot reloading of templates during development, enabling instant updates without server restarts, which speeds up the iteration cycle.
Cons
As a lightweight engine, jte lacks advanced helpers for common UI tasks like form handling or pagination, requiring developers to write more custom code.
Full IDE support is tied to IntelliJ IDEA, meaning teams using Eclipse, VS Code, or other editors miss out on key productivity features like completion and refactoring.
The compile-time processing adds steps to the build, which can complicate CI/CD pipelines or projects with complex dependency management, as noted in the emphasis on compile-time features.
While it integrates with many frameworks, some integrations are community-driven and may be less mature or documented compared to established alternatives like Thymeleaf.
Frequently Asked Questions
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