A simple Crawler

This project consists of 1 main directory, 4 sub directories , 1 main
page(html) , 1 servlet DD , 4 java files , 7 classes , and 1 document
file as the list below:

- [hw5] --- index.html
- readme.txt
- [WEB-INF] --- web.xml
- [classes] --- [mvc] --- HelloController.java
- HelloController.class
- HelloModel.java
- HelloMOdel.class
- HelloView.java
- HelloView.class
- HelloResult.java
- HelloResult.class
- Bfs.class
- Queue.class
- WebSource.class
- [hw5]
- [WEB-INF]
- [classes]
- [mvc]
- index.html ( first page for crawler )
- web.xml ( the configuraion of all servlet )
- HelloController.java ( process the HTTP request and response )
- HelloModel.java ( main process and crawler , url match )
- HelloView.java ( show the result of crawler and search)
- HelloResult.java ( show the search result)