License: (CC 3.0) BY-NC-SA

References

1. 抓取网页内容
2. 多线程下载
3. 后台运行
4. log4j guide

key point:

Q: background run start /b java xxx then you can run the program in the background

Q: ignore files already download java.io.File.exists()

update-log:

2012-07-12

• now we can print the content of http://www.51voa.com/ on screen
• now we can print the line contains list
• now we can print the url of all relatest list
• now we can specify a date to get list on that day
• now we can ignore Bilingual News
• bug fixed: some li element just contain 4 a elements, which means this list does not contain a translation
• now we can download all the mp3 of current day

2012-07-13

• now we can ignore mp3 which have already download
• now we can print info to a log file

2012-07-20

• now we can specify start date to download mp3 files between start date and end date

2012-07-22

bug fixed:

before: if there is no specified start date, program will list releatest as null

after: program will use end date as start date