dnsjava

   简介：   Base32编码使用32个ASCII字符对任何数据进行编码，Base32与Base64的实现原理类似，同样是将原数据二进制形式取指定位数转换为ASCII码。首先获取数据的二进制形式，将其串联起来，每5个比特为一组进行切分，每一组内的5个比特可转换到指定的32个ASCII字符中的一个，将转换后的ASCII字符连接起来，就是编码后的数据。    字典：   Base32依赖更小的字典，Base32编码时每5个字符为一个分组，字典的长度为2 5 + 1=33。   Base32通用的字典定义如下： Value Encoding Value Encoding Value Encoding Value Encoding 0 A 9 J 18 S 27 3 1 B 10 K 19 T 28 4 2 C 11 L 20 U 29 5 3 D 12 M 21 V 30 6 4 E 13 N 22 W 31 7 5 F 14 O 23 X padding = 6 G 15 P 24 Y 7 H 16 Q 25 Z 8 I 17 R 26 2   Base32还提供了另外一种字典定义，即Base32十六进制字母表。Base32十六进制字母表是参照十六进制的计数规则定义： Value Encoding Value Encoding Value Encoding Value

I'm building a fast web crawler and I need to have multithreaded DNS resolution, so I picked up a multithreaded DNS service provider called dnsjava . Unfortunately, I can't figure out how to replace the default DNS Service Provider. I went over the README file for dnsjava, but the instructions are not very through. Replacing the standard Java DNS functionality: Beginning with Java 1.4, service providers can be loaded at runtime. To load the dnsjava service provider, build it as explained above and set the system property: sun.net.spi.nameservice.provider.1=dns,dnsjava This instructs the JVM to