# nageoffer/12306: A High-Concurrency Java Portfolio Project Modelled on China's Railway Ticketing System

> nageoffer/12306 is an open-source Java project that reproduces the core services of China's railway ticket platform at high-concurrency scale, built specifically to give computer science students a technically demanding entry for their job-application resumes. It ships in two independently startable versions: a SpringBoot aggregation build for testing and a SpringCloud microservices build for architecture study.

**nageoffer/12306** — 🔥 官方推荐 🔥 大学春招、秋招、应届项目，SpringBoot3 + Java17 + SpringCloud Alibaba + Vue3 等技术架构，完成高仿铁路 12306 用户 + 抢票 + 订单 + 支付服务，帮助学生主打就业的项目。

- Repository: https://github.com/nageoffer/12306
- Website: https://nageoffer.com
- Stars: 3,748 · Forks: 372
- Language: Java
- License: Apache-2.0
- Published: 2026-09-23 · Updated: 2026-09-23 · Language: en
- Canonical page: https://hysenlabs.com/projects/nageoffer-12306

## What nageoffer/12306 Solves and Who It Is For

Campus recruiting in China's software industry regularly features technical interviews around distributed systems, caching, and database sharding. A candidate who can speak to those topics from direct implementation experience has a concrete advantage over one who has only read about them. nageoffer/12306 is built around that gap: it provides a complete, working high-concurrency ticketing service that students can run, study, and describe in detail during interviews.

The README frames the project explicitly around school recruiting. It lists the kinds of technical questions an interviewer might ask about the system and provides guidance on writing the project onto a resume with identified highlights, difficulties, and solutions. A companion document library on nageoffer.com contains more than 100 technical articles organised into quick-start, core technology, and step-by-step construction sections.

The scope covers the same service boundaries as the real 12306 platform: user accounts and passenger management, ticket search and seat inventory, order submission and confirmation, payment processing, and an API gateway. A live demo at 12306.magestack.cn is referenced in the README, though students are expected to run their own instances for study purposes.

## Architecture: JDK17, SpringBoot3, and SpringCloud Alibaba

The technology stack is chosen to reflect what major employers in China are adopting: JDK17, SpringBoot3, SpringCloud Alibaba, and Vue3 for the frontend. The project ships two independently deployable configurations.

The SpringBoot aggregation service collapses all back-end functionality into a single startable service alongside the gateway. The README recommends this path for testing and deployment. The SpringCloud microservices version splits payment, order, user, ticketing, and gateway into separate services, which is the configuration described in most of the companion documentation and suited for learning distributed design patterns.

The codebase incorporates examples of database sharding (分库分表), message queues, design patterns including the chain-of-responsibility pattern, distributed ID generation, thread pool construction using the Builder pattern, and caching with Redis. These are documented in individual technical articles referenced from the README.

## Key Technical Problems the Code Addresses

The README walks through several non-obvious design decisions that set this project apart from simpler CRUD tutorials.

Ticket inventory is not stored as a simple per-route count. A ticket from Beijing South to Nanjing South also deducts inventory for the Beijing South to Jinan West and Jinan West to Nanjing South segments. The system must validate availability across all segment combinations before confirming a purchase. If any intermediate segment is sold out, the booking fails. This multi-segment inventory model matches the behaviour of the real railway platform.

Seat allocation for group bookings applies a priority sequence: first, it looks for adjacent seats within a single carriage; failing that, non-adjacent seats in the same carriage; and last, seats in different carriages. The README traces this algorithm explicitly.

The user account system must handle login by username, phone number, and email while the accounts are stored in a sharded database keyed by a different field. The resulting read request fan-out problem, where a login cannot determine the shard without knowing the shard key, is addressed in the codebase. Cache penetration for the high-concurrency registration scenario is also documented, with the README noting that naive solutions such as null-value caching and Bloom filters each have known gaps.

Sensitive personal data including names, phone numbers, identity numbers, and addresses are encrypted in the database. The README cites this as a design requirement given the value of the data if the database were compromised.

## Getting the Project Running

The README points to the quick-start documentation on nageoffer.com rather than reproducing all setup steps inline. The documented path begins with middleware environment preparation (the project depends on Redis, RocketMQ, Elasticsearch or an equivalent, and a relational database), followed by separate instructions for starting the backend and the frontend.

The top-level directory structure separates concerns clearly: services/ holds the individual microservice modules, console-vue/ is the Vue3 frontend, frameworks/ contains shared utility code, and resources/ holds static configuration. The aggregation service is identified as aggregation-service within the services directory.

Cloning the repository:

```bash
git clone https://github.com/nageoffer/12306.git
cd 12306
```

The project uses Maven as its build tool. The mvnw wrapper is included. JDK17 is required; the pom.xml sets the Java version.

Full startup guidance, including which middleware to configure first and what environment variables to set, is in the quick-start articles on nageoffer.com. The README links directly to those articles and does not replicate them in the repository itself.

## Limitations and Cases Where It Is the Wrong Choice

The project has a narrow intended audience. Its documentation, community infrastructure (a WeChat group referenced in the README with 2000-plus members), and surrounding content are almost entirely in Simplified Chinese. Developers not reading Chinese will find the setup documentation, which lives on nageoffer.com, largely inaccessible.

It is not a production system. The README is clear that the project is a learning resource, not a platform for real ticket transactions. Operating it as a service accessible to the public would raise questions about data handling and compliance that the project does not address.

The last push to the main branch was on 2026-03-12. The repository is not archived, but no releases have been published on GitHub. Students checking whether the codebase aligns with current SpringBoot3 and SpringCloud Alibaba releases should verify dependency versions in the pom.xml before building.

A comparable alternative is the open-source e-commerce training projects in the same nageoffer ecosystem, such as the Ragent AI project mentioned in the README, which targets the AI-application job market. The difference in approach is domain: 12306 focuses on high-concurrency transport ticketing with its specific inventory and seat-allocation problems; an e-commerce project covers a different set of distributed-system patterns.

## Documentation Depth and Resume Guidance

The companion documentation structure on nageoffer.com organises more than 100 articles into three tracks. The quick-start track covers environment setup and service startup for both the aggregation and microservices versions. The core technology track documents individual components: distributed ID generation, thread pool construction, the chain-of-responsibility pattern, database sharding strategy, and others. The from-zero-to-one track follows the construction of the system in sequence, suitable for a student who wants to understand not just what the code does but why each decision was made.

A dedicated interview series is included. It documents how to write the project onto a resume with specific highlights and difficulty points, collects interview questions that past users of the project have encountered at major employers, and provides answers.

This documentation depth is what distinguishes nageoffer/12306 from a code dump. The project is explicitly designed as a learning path with measurable outcomes for campus recruiting, not as infrastructure for a new application.

## Conclusion

This project is the right choice for Chinese computer science students who want to demonstrate practical knowledge of distributed system design in SpringBoot3, SpringCloud Alibaba, and JDK17 during campus recruiting. It is not a production railway system and is not intended as one. Developers looking for a general tutorial on microservices rather than a job-application artefact will find the scope narrow. The last push to the main branch was on 2026-03-12. Before committing time to it, confirm that the 100-plus documentation articles on nageoffer.com are still accessible, as the codebase references them for critical setup and deployment steps.

## FAQ

### What is the nageoffer/12306 project?

nageoffer/12306 is an open-source Java project that replicates the core services of China's railway ticketing platform at high-concurrency scale. It is designed as a portfolio project for computer science students targeting software engineering roles in Chinese companies.

### Which version should a student start with, the SpringBoot aggregation or the SpringCloud microservices build?

The README recommends the aggregation service for testing and deployment, as it starts as a single process alongside the gateway. The SpringCloud microservices version, which runs each service independently, is described as better for studying distributed system design.

### Does nageoffer/12306 include frontend code?

Yes. The repository includes a Vue3 frontend in the console-vue/ directory that implements a UI close to the real 12306 platform. The README notes that the frontend was still under development at the time of writing, with a console operations manual promised on completion.

## Sources

- [Issues](https://github.com/nageoffer/12306/issues)
- [License: Apache-2.0](https://github.com/nageoffer/12306/blob/main/LICENSE)
- [nageoffer/12306 on GitHub](https://github.com/nageoffer/12306)
- [Project website](https://nageoffer.com)
- [README](https://github.com/nageoffer/12306/blob/main/README.md)

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Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/nageoffer-12306