# University News Crawler

Java homework project for crawling:

- `https://news.hnu.edu.cn/`
- `https://news.csu.edu.cn/`
- `https://news.hunnu.edu.cn/`

The code demonstrates the required architecture:

- CLI interactive command line
- MVC: `model`, `view`, `controller`
- Command pattern: `command` package
- Strategy pattern: `strategy` package, one strategy per target website
- Custom exception hierarchy: `exception` package
- File persistence: JSON or CSV output

## Run

```powershell
mvn test
mvn exec:java -Dexec.args="crawl --site all --limit 5 --format json --out data/news.json"
```

Interactive CLI:

```powershell
mvn exec:java
```

Useful commands:

```text
help
sites
crawl --site all --limit 10 --format json --out data/news.json
crawl --site hnu --limit 5 --format csv --out data/hnu.csv
exit
```

## Output Fields

Each crawled news item includes:

- school
- site key
- title
- url
- publish time
- source
- author
- summary
- content preview
- crawled time