Jakarta-Common-Codec使用笔记
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package demo;
import org.apache.commons.codec.binary.Base64;
public class Base64Test ...{
public static void main(String[] args) ...{
Base64 base64 = new Base64();
String str = "中文";
byte[] enbytes = null;
String encodeStr = null;
byte[] debytes = null;
String decodeStr = null;
enbytes = base64.encode(str.getBytes());
encodeStr = new String(enbytes);
debytes = base64.decode(enbytes);
decodeStr = new String(debytes);
System.out.println("编码前:" + str);
System.out.println("编码后:" + encodeStr);
System.out.println("解码后:" + decodeStr);
}
}
package demo;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
public class HexTest ...{
public static void main(String[] args) throws DecoderException ...{
Hex hex = new Hex();
String str = "中文";
char[] enbytes = null;
String encodeStr = null;
byte[] debytes = null;
String decodeStr = null;
enbytes = hex.encodeHex(str.getBytes());
encodeStr = new String(enbytes);
debytes = hex.decodeHex(enbytes);
decodeStr = new String(debytes);
System.out.println("编码前:" + str);
System.out.println("编码后:" + encodeStr);
System.out.println("解码后:" + decodeStr);
}
}
package demo;
import org.apache.commons.codec.language.Metaphone;
import org.apache.commons.codec.language.RefinedSoundex;
import org.apache.commons.codec.language.Soundex;
public class LanguageTest ...{
public static void main(String[] args) ...{
Metaphone metaphone = new Metaphone();
RefinedSoundex refinedSoundex = new RefinedSoundex();
Soundex soundex = new Soundex();
for (int i = 0; i < 2; i++) ...{
String str = (i == 0) ? "resume" : "resin";
String mString = null;
String rString = null;
String sString = null;
try ...{
mString = metaphone.encode(str);
rString = refinedSoundex.encode(str);
sString = soundex.encode(str);
} catch (Exception ex) ...{
;
}
System.out.println("Original:" + str);
System.out.println("Metaphone:" + mString);
System.out.println("RefinedSoundex:" + rString);
System.out.println("Soundex:" + sString + "\n");
}
}
}
commons codec 提供 base64, hex, 及 metaphone, soundex 等编码演算。
下载地址：http://commons.apache.org/codec/
A.Base64 编解码
package demo;import org.apache.commons.codec.binary.Base64;public class Base64Test ...{ public static void main(String[] args) ...{ Base64 base64 = new Base64(); String str = "中文"; byte[] enbytes = null; String encodeStr = null; byte[] debytes = null; String decodeStr = null; enbytes = base64.encode(str.getBytes()); encodeStr = new String(enbytes); debytes = base64.decode(enbytes); decodeStr = new String(debytes); System.out.println("编码前:" + str); System.out.println("编码后:" + encodeStr); System.out.println("解码后:" + decodeStr); }}
B.Hex 编解码
package demo;import org.apache.commons.codec.DecoderException;import org.apache.commons.codec.binary.Hex;public class HexTest ...{ public static void main(String[] args) throws DecoderException ...{ Hex hex = new Hex(); String str = "中文"; char[] enbytes = null; String encodeStr = null; byte[] debytes = null; String decodeStr = null; enbytes = hex.encodeHex(str.getBytes()); encodeStr = new String(enbytes); debytes = hex.decodeHex(enbytes); decodeStr = new String(debytes); System.out.println("编码前:" + str); System.out.println("编码后:" + encodeStr); System.out.println("解码后:" + decodeStr); }}C.Metaphone 及 Soundex 编码
package demo;import org.apache.commons.codec.language.Metaphone;import org.apache.commons.codec.language.RefinedSoundex;import org.apache.commons.codec.language.Soundex;public class LanguageTest ...{ public static void main(String[] args) ...{ Metaphone metaphone = new Metaphone(); RefinedSoundex refinedSoundex = new RefinedSoundex(); Soundex soundex = new Soundex(); for (int i = 0; i < 2; i++) ...{ String str = (i == 0) ? "resume" : "resin"; String mString = null; String rString = null; String sString = null; try ...{ mString = metaphone.encode(str); rString = refinedSoundex.encode(str); sString = soundex.encode(str); } catch (Exception ex) ...{ ; } System.out.println("Original:" + str); System.out.println("Metaphone:" + mString); System.out.println("RefinedSoundex:" + rString); System.out.println("Soundex:" + sString + "\n"); } }}Metaphone 建立出相同的key给发音相似的单字, 比 Soundex 还要准确, 但是 Metaphone 没有固定长度, Soundex 则是固定第一个英文字加上3个数字. 这通常是用在类似音比对, 也可以用在 MP3 的软件开发.
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