java 编写 Oracle函数

    create or replace and compile java source named base64 as  
    package cn.com.pansky.util;  
      
    /** 
     * This is a base 64 conversion class based on RFC 2045 6.8. 
     * Base64 Content-Tranfser-Encoding... 
     * @version 1.0 
     */  
    public final class  Base64 {  
      
        static private final int  BASELENGTH         = 255;  
        static private final int  LOOKUPLENGTH       = 64;  
        static private final int  TWENTYFOURBITGROUP = 24;  
        static private final int  EIGHTBIT           = 8;  
        static private final int  SIXTEENBIT         = 16;  
        static private final int  SIXBIT             = 6;  
        static private final int  FOURBYTE           = 4;  
        static private final int  SIGN               = -128;  
        static private final char PAD                = '=';  
        static private final boolean fDebug          = false;  
        static final private byte [] base64Alphabet        = new byte[BASELENGTH];  
        static final private char [] lookUpBase64Alphabet  = new char[LOOKUPLENGTH];  
      
        static {  
      
            for (int i = 0; i<BASELENGTH; i++) {  
                base64Alphabet[i] = -1;  
            }  
            for (int i = 'Z'; i >= 'A'; i--) {  
                base64Alphabet[i] = (byte) (i-'A');  
            }  
            for (int i = 'z'; i>= 'a'; i--) {  
                base64Alphabet[i] = (byte) ( i-'a' + 26);  
            }  
      
            for (int i = '9'; i >= '0'; i--) {  
                base64Alphabet[i] = (byte) (i-'0' + 52);  
            }  
      
            base64Alphabet['+']  = 62;  
            base64Alphabet['/']  = 63;  
      
            for (int i = 0; i<=25; i++)  
                lookUpBase64Alphabet[i] = (char)('A'+i);  
      
            for (int i = 26,  j = 0; i<=51; i++, j++)  
                lookUpBase64Alphabet[i] = (char)('a'+ j);  
      
            for (int i = 52,  j = 0; i<=61; i++, j++)  
                lookUpBase64Alphabet[i] = (char)('0' + j);  
            lookUpBase64Alphabet[62] = (char)'+';  
            lookUpBase64Alphabet[63] = (char)'/';  
      
        }  
      
        protected static boolean isWhiteSpace(char octect) {  
            return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);  
        }  
      
        protected static boolean isPad(char octect) {  
            return (octect == PAD);  
        }  
      
        protected static boolean isData(char octect) {  
            return (base64Alphabet[octect] != -1);  
        }  
      
        protected static boolean isBase64(char octect) {  
            return (isWhiteSpace(octect) || isPad(octect) || isData(octect));  
        }  
      
        public static String encode(String str) {  
          if(str==null || str.equals("")) return null;  
          return encode(str.getBytes());  
        }  
        
        /** 
         * Encodes hex octects into Base64 
         * 
         * @param binaryData Array containing binaryData 
         * @return Encoded Base64 array 
         */  
        public static String encode(byte[] binaryData) {  
      
            if (binaryData == null)  
                return null;  
      
            int      lengthDataBits    = binaryData.length*EIGHTBIT;  
            if (lengthDataBits == 0) {  
                return "";  
            }  
            
            int      fewerThan24bits   = lengthDataBits%TWENTYFOURBITGROUP;  
            int      numberTriplets    = lengthDataBits/TWENTYFOURBITGROUP;  
            int      numberQuartet     = fewerThan24bits != 0 ? numberTriplets+1 : numberTriplets;  
            int      numberLines       = (numberQuartet-1)/19+1;  
            char     encodedData[]     = null;  
      
            encodedData = new char[numberQuartet*4+numberLines];  
      
            byte k=0, l=0, b1=0,b2=0,b3=0;  
      
            int encodedIndex = 0;  
            int dataIndex   = 0;  
            int i           = 0;  
            if (fDebug) {  
                System.out.println("number of triplets = " + numberTriplets );  
            }  
      
            for (int line = 0; line < numberLines-1; line++) {  
                for (int quartet = 0; quartet < 19; quartet++) {  
                    b1 = binaryData[dataIndex++];  
                    b2 = binaryData[dataIndex++];  
                    b3 = binaryData[dataIndex++];  
      
                    if (fDebug) {  
                        System.out.println( "b1= " + b1 +", b2= " + b2 + ", b3= " + b3 );  
                    }  
      
                    l  = (byte)(b2 & 0x0f);  
                    k  = (byte)(b1 & 0x03);  
      
                    byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);  
      
                    byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);  
                    byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);  
      
                    if (fDebug) {  
                        System.out.println( "val2 = " + val2 );  
                        System.out.println( "k4   = " + (k<<4));  
                        System.out.println( "vak  = " + (val2 | (k<<4)));  
                    }  
      
                    encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];  
                    encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];  
                    encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];  
                    encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];  
      
                    i++;  
                }  
                encodedData[encodedIndex++] = 0xa;  
            }  
      
            for (; i<numberTriplets; i++) {  
                b1 = binaryData[dataIndex++];  
                b2 = binaryData[dataIndex++];  
                b3 = binaryData[dataIndex++];  
      
                if (fDebug) {  
                    System.out.println( "b1= " + b1 +", b2= " + b2 + ", b3= " + b3 );  
                }  
      
                l  = (byte)(b2 & 0x0f);  
                k  = (byte)(b1 & 0x03);  
      
                byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);  
      
                byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);  
                byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);  
      
                if (fDebug) {  
                    System.out.println( "val2 = " + val2 );  
                    System.out.println( "k4   = " + (k<<4));  
                    System.out.println( "vak  = " + (val2 | (k<<4)));  
                }  
      
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ (l <<2 ) | val3 ];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ b3 & 0x3f ];  
            }  
      
            // form integral number of 6-bit groups  
            if (fewerThan24bits == EIGHTBIT) {  
                b1 = binaryData[dataIndex];  
                k = (byte) ( b1 &0x03 );  
                if (fDebug) {  
                    System.out.println("b1=" + b1);  
                    System.out.println("b1<<2 = " + (b1>>2) );  
                }  
                byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ k<<4 ];  
                encodedData[encodedIndex++] = PAD;  
                encodedData[encodedIndex++] = PAD;  
            } else if (fewerThan24bits == SIXTEENBIT) {  
                b1 = binaryData[dataIndex];  
                b2 = binaryData[dataIndex +1 ];  
                l = ( byte ) ( b2 &0x0f );  
                k = ( byte ) ( b1 &0x03 );  
      
                byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);  
                byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);  
      
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ val1 ];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ val2 | ( k<<4 )];  
                encodedData[encodedIndex++] = lookUpBase64Alphabet[ l<<2 ];  
                encodedData[encodedIndex++] = PAD;  
            }  
      
            encodedData[encodedIndex] = 0xa;  
            
            return new String(encodedData);  
        }  
      
        /** 
         * Decodes Base64 data into octects 
         * 
         * @param binaryData Byte array containing Base64 data 
         * @return Array containind decoded data. 
         */  
        public static byte[] decode(String encoded) {  
      
            if (encoded == null)  
                return null;  
      
            char[] base64Data = encoded.toCharArray();  
            // remove white spaces  
            int len = removeWhiteSpace(base64Data);  
            
            if (len%FOURBYTE != 0) {  
                return null;//should be divisible by four  
            }  
      
            int      numberQuadruple    = (len/FOURBYTE );  
      
            if (numberQuadruple == 0)  
                return new byte[0];  
      
            byte     decodedData[]      = null;  
            byte     b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;  
            char     d1=0,d2=0,d3=0,d4=0;  
      
            int i = 0;  
            int encodedIndex = 0;  
            int dataIndex    = 0;  
            decodedData      = new byte[ (numberQuadruple)*3];  
      
            for (; i<numberQuadruple-1; i++) {  
      
                if (!isData( (d1 = base64Data[dataIndex++]) )||  
                    !isData( (d2 = base64Data[dataIndex++]) )||  
                    !isData( (d3 = base64Data[dataIndex++]) )||  
                    !isData( (d4 = base64Data[dataIndex++]) ))  
                    return null;//if found "no data" just return null  
      
                b1 = base64Alphabet[d1];  
                b2 = base64Alphabet[d2];  
                b3 = base64Alphabet[d3];  
                b4 = base64Alphabet[d4];  
      
                decodedData[encodedIndex++] = (byte)(  b1 <<2 | b2>>4 ) ;  
                decodedData[encodedIndex++] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );  
                decodedData[encodedIndex++] = (byte)( b3<<6 | b4 );  
            }  
      
            if (!isData( (d1 = base64Data[dataIndex++]) ) ||  
                !isData( (d2 = base64Data[dataIndex++]) )) {  
                return null;//if found "no data" just return null  
            }  
      
            b1 = base64Alphabet[d1];  
            b2 = base64Alphabet[d2];  
      
            d3 = base64Data[dataIndex++];  
            d4 = base64Data[dataIndex++];  
            if (!isData( (d3 ) ) ||  
                !isData( (d4 ) )) {//Check if they are PAD characters  
                if (isPad( d3 ) && isPad( d4)) {               //Two PAD e.g. 3c[Pad][Pad]  
                    if ((b2 & 0xf) != 0)//last 4 bits should be zero  
                        return null;  
                    byte[] tmp = new byte[ i*3 + 1 ];  
                    System.arraycopy( decodedData, 0, tmp, 0, i*3 );  
                    tmp[encodedIndex]   = (byte)(  b1 <<2 | b2>>4 ) ;  
                    return tmp;  
                } else if (!isPad( d3) && isPad(d4)) {               //One PAD  e.g. 3cQ[Pad]  
                    b3 = base64Alphabet[ d3 ];  
                    if ((b3 & 0x3 ) != 0)//last 2 bits should be zero  
                        return null;  
                    byte[] tmp = new byte[ i*3 + 2 ];  
                    System.arraycopy( decodedData, 0, tmp, 0, i*3 );  
                    tmp[encodedIndex++] = (byte)(  b1 <<2 | b2>>4 );  
                    tmp[encodedIndex]   = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );  
                    return tmp;  
                } else {  
                    return null;//an error  like "3c[Pad]r", "3cdX", "3cXd", "3cXX" where X is non data  
                }  
            } else { //No PAD e.g 3cQl  
                b3 = base64Alphabet[ d3 ];  
                b4 = base64Alphabet[ d4 ];  
                decodedData[encodedIndex++] = (byte)(  b1 <<2 | b2>>4 ) ;  
                decodedData[encodedIndex++] = (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );  
                decodedData[encodedIndex++] = (byte)( b3<<6 | b4 );  
      
            }  
      
            return decodedData;  
        }  
      
        /** 
         * remove WhiteSpace from MIME containing encoded Base64 data. 
         * 
         * @param data  the byte array of base64 data (with WS) 
         * @return      the new length 
         */  
        protected static int removeWhiteSpace(char[] data) {  
            if (data == null)  
                return 0;  
      
            // count characters that's not whitespace  
            int newSize = 0;  
            int len = data.length;  
            for (int i = 0; i < len; i++) {  
                if (!isWhiteSpace(data[i]))  
                    data[newSize++] = data[i];  
            }  
            return newSize;  
        }  
    }  

    create or replace and compile java source named ldapconvert as  
    package cn.com.pansky.util;  
      
    /** 
     * 这是把中文字符串转换成LDAP可导入格式的转换类 
     * LDAP可导入格式是先按UTF-8取字节，然后对字节进行BASE64编码 
     * 
     * @version 1.0 
     * @author Sheng Youfu 
     */  
    public class LDAPConvert {  
      private LDAPConvert() { }  
      
      /** 
       * 取按UTF-8编码方式字码数组并进行Base64编码 
       * @param str:  待处理字符串 
       * @return 处理后的ASCII字符串 
       */  
      public static final String encode(String str) {  
        if (str == null || str.length() == 0) {  
          return null;  
        } else {  
          try {  
            Base64 b64 = new Base64();  
            byte[] tempByte = str.getBytes("UTF-8");  
            String tempStr = b64.encode(tempByte);  
            return tempStr;  
          }catch(java.io.UnsupportedEncodingException ex) {  
            return "UnsuppoertedEncodingException";  
          }  
        }  
      }  
      
      /** 
       * 对已经编码过的字符串进行解码，先进行Base64解码得到UTF-8字节数组，然后再转换成字符串 
       * @param str:  待解码的字符串 
       * @return 解码后的字符串 
       */  
      public static final String decode(String str) {  
        if (str == null || str.length() == 0) {  
          return null;  
        }  
        else {  
          try {  
            Base64 b64 = new Base64();  
            byte[] tempByte = b64.decode(str);  
            String tempStr = new String(tempByte, "UTF-8");  
            return tempStr;  
          }catch(java.io.UnsupportedEncodingException ex) {  
            return "UnsuppoertedEncodingException";  
          }      
        }  
      }  
    }  

第三步： 把转换类中的两个方法封装成Oracle函数：

  

 --编码函数  
    CREATE OR REPLACE FUNCTION LDAPEncode (str VARCHAR2) RETURN VARCHAR2  
    as language java name  
        'cn.com.pansky.util.LDAPConvert.encode(java.lang.String)  
              return java.lang.String';  
      
    --解码函数  
    CREATE OR REPLACE FUNCTION LDAPDecode (str VARCHAR2) RETURN VARCHAR2  
    as language java name  
        'cn.com.pansky.util.LDAPConvert.decode(java.lang.String)  
              return java.lang.String';  

    select '  
    dn: uid=000000' || uid || ',cn=nsr,ou=People,dc=xmds4,dc=ldap  
    objectClass: top  
    objectClass: person  
    objectClass: organizationalPerson  
    objectClass: inetOrgPerson  
    objectClass: mailrecipient  
    objectClass: nsmessagingserveruser  
    cn:: ' || LDAPENCODE(rtrim(username)) || 'givenName: 000000' || uid || '  
    mail: 000000' || uid || '@mails.xmds.gov  
    mailDeliveryOption: mailbox  
    mailHost: mails.xmds.gov  
    nsmsgDisallowAccess: imap http  
    sn:: ' || LDAPENCODE(rtrim(username)) || 'uid: 000000' || uid || '  
    employeeType: dwsbh  
    userPassword:: e1NTSEF9K01YbzNLcGE1cmNyeVRCeWpqYzI5eUxRWnJLWmFldFhFR0JrWnc9PQ==  
      
    ' from DJ_QYFRJBXX T where T.DJBLX_DM='10'   
    order by uid  

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