无意间看到一个很有意思的table，呵呵，对于要实现FTP功能的人应该是个参考吧:)
| Library |  |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Evaluated version | 4.2 | V5 | 1.2.1 | 2.0.1 | 1.07 | 1.0.0 | 3.0 | 1.2.2 | 2.6 | 0.70 | 1.0a |
| Support: | |||||||||||
| Javadoc | Y | Y | Y | – | – | Y | Y | – | – | Y | Y |
| Sample code | Y | Y | Y | Y | Y | Y | Y | – | Y | Y | Y |
| Forum | – | – | – | n/a | Y | – | – | Y | – | – | – |
| Mailing list | – | – | – | n/a | Y | Y | – | – | – | – | Y |
| Y | Y | Y | n/a | Y | – | – | – | Y | Y | Y | |
| Online bug tracking system | – | Y | – | n/a | Y | Y | – | – | – | – | Y |
| Motivation | P | P | I | P | G | G | – | – | I | I | P |
| License | C | C | F | F | G | F | F | F | G | – | F |
| Price per developer | $399 | $895 | $0 | n/a | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Price per site | $799 | n/a | $0 | n/a | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Source provided | – | – | Y | Y | Y | Y | – | – | Y | Y | Y |
| Age | 2000 | 1995 | 2000 | 1998 | 2001 | 1998 | n/a | 1995 | 2001 | 2001 | 1999 |
| Directory listing: | |||||||||||
| Structured file objects | Y | Y | – | Y | Y | Y | Y | – | Y | Y | Y |
| Date/time parsing | – | – | – | – | – | Y | – | – | Y | Y | – |
| Alternative | S | S | C | C | S | P | P | – | P | P | P |
MDTM command |
Y | – | Y | – | – | – | Y | – | – | – | Y |
| Socks proxy | – | Y | Y | Y | – | – | – | – | – | – | – |
| HTTP tunnel | – | Y | – | – | – | – | – | – | – | – | – |
| Active/passive connection | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Transfer: | |||||||||||
| Download | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Upload | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Parallel transfer | Y | Y | – | – | Y | – | – | – | Y | – | – |
| Progress monitoring | Y | Y | – | – | Y | – | – | – | Y | Y | Y |
| Multiple transfer | Y | – | – | Y | – | – | – | – | – | Y | – |
| Recursive transfer | – | – | – | – | Y | – | – | – | – | Y | – |
| ASCII/binary | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| auto. ASCII/binary | Y | – | – | – | – | – | – | – | Y | Y | – |
| Transfer resumption | – | Y | – | Y | Y | Y | Y | – | Y | – | Y |
| Between two servers | – | – | – | – | – | – | – | – | – | – | Y |
| JavaBean | Y | Y | – | Y | – | – | Y | – | – | – | – |
| Pure Java | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| Java exceptions | Y | Y | Y | Y | Y | Y | Y | Y | – | Y | Y |
Key:
Product support
- I: A voluntary individual
- G: A voluntary group
- P: A professional entity, paid to provide support
Licenses
- C: Commercial
- G: GPL, GNU General Public License
- F: Free
Directory listing support
- S: An additional method returning raw FTP response as one string
- C: An additional method returning a collection of raw strings, one string per line/file
- P: A framework supporting pluggable parsers
原文链接：http://www.javaworld.com/javaworld/jw-04-2003/ftp/jw-0404-ftptable.html
总的来说Jakarta的Commons Net还是不错的，而且这里所比较的都是旧版本，刚看了一下其他一些库的主页，活跃程度都不及Commons Net。
嗯，看来没选错:^D
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