import java.security.MessageDigest;
import COM.ibm.db2.app.UDF;
public class MD5UDF extends UDF {
public static String MD5(String s) {
String s1 = new String("");
char hexDigits[] = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘,
‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘ };
try {
byte[] strTemp = s.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(strTemp);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i ) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
s1 = new String(str);
} catch (Exception e) {
System.out.println(e.getMessage());
}
return "{" + s1 + "}";
}
public static void main(String[] args){
System.out.println(MD5("asdf"));
}
}
5.连上数据库,运行安装.jar文件到数据库(C:\Documents and Settings\ALL USERS\Application Data\IBM\DB2\DB2COPY1\function\jar\ZEN 目录下)
DROP FUNCTION BI_MD5;
CREATE FUNCTION BI_MD5(VARCHAR(200))
RETURNS VARCHAR(70)
EXTERNAL NAME ‘MD5UDF:MD5UDF.MD5‘
FENCED VARIANT
NO SQL
EXTERNAL ACTION
LANGUAGE JAVA
PARAMETER STYLE JAVA
参考文章:
http://bbs.chinaunix.net/thread-966098-1-1.html
http://www.ibm.com/developerworks/cn/data/library/techarticle/dm-1012liucs/
http://www.ibm.com/developerworks/data/library/techarticle/dm-0510law/index.html