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This article focuses on "how to create UNWRAP functions", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to create a UNWRAP function.

Create UNWRAP function CREATE OR REPLACE PACKAGE AMOSUNWRAPPER IS FUNCTION DEFLATE (SRC IN VARCHAR2) RETURN RAW; FUNCTION DEFLATE (SRC IN VARCHAR2, QUALITY IN NUMBER) RETURN RAW; FUNCTION INFLATE (SRC IN RAW) RETURN VARCHAR2;END;/CREATE OR REPLACE PACKAGE BODY AMOSUNWRAPPER IS FUNCTION DEFLATE (SRC IN VARCHAR2) RETURN RAW IS BEGIN RETURN DEFLATE (SRC, 6); END; FUNCTION DEFLATE (SRC IN VARCHAR2, QUALITY IN NUMBER) RETURN RAW AS LANGUAGE JAVA NAME 'UNWRAPPER.Deflate (java.lang.String, int) return byte []' FUNCTION INFLATE (SRC IN RAW) RETURN VARCHAR2 AS LANGUAGE JAVA NAME 'UNWRAPPER.Inflate (byte []) return java.lang.String';END;//* Formatted on2011/8/18 13:00:16 (QP5 v5.163.1008.3004) * / CREATE OR REPLACE JAVA SOURCE NAMED UNWRAPPERASimport java.io.*;import java.util.zip.*;public class UNWRAPPER {public static String Inflate (byte [] src) {try {ByteArrayInputStream bis = new ByteArrayInputStream (src); InflaterInputStream iis = new InflaterInputStream (bis) StringBuffer sb = new StringBuffer (); for (int c = iis.read (); c! =-1; c = iis.read ()) {sb.append ((char) c);} return sb.toString ();} catch (Exception e) {} return null;} public static byte [] Deflate (String src, int quality) {try {byte [] tmp = new byte [src.length () + 100] Deflater defl = new Deflater (quality); defl.setInput (src.getBytes ("UTF-8")); defl.finish (); int cnt = defl.deflate (tmp); byte [] res = new byte [cnt]; for (int I = 0; I

< cnt; i++) res = tmp; return res; } catch (Exception e) { } return null; }}/ALTER JAVA SOURCE UNWRAPPER COMPILE//* Formatted on2011/8/18 13:02:57 (QP5 v5.163.1008.3004) */--为了输出中文，要修改java过程CREATE OR REPLACE JAVA SOURCE NAMED UNWRAPPERASimport java.io.*;import java.util.zip.*; public class UNWRAPPER { public static String Inflate(byte[] src) { try { ByteArrayInputStream bis = new ByteArrayInputStream( src ); InflaterInputStream iis = new InflaterInputStream( bis ); StringBuffer sb = new StringBuffer(); for(int c = iis.read(); c != -1; c = iis.read()) { sb.append((char) c); } String hello = new String(sb.toString().getBytes("iso8859-1"), "GBK"); return hello; } catch(Exception e) { } return null; } public static byte[] Deflate(String src, int quality) { try { byte[] tmp = new byte[src.length() + 100]; Deflater defl = new Deflater(quality); defl.setInput(src.getBytes("UTF-8")); defl.finish(); int cnt = defl.deflate(tmp); byte[] res = new byte[cnt]; for(int i = 0; i < cnt; i++) res = tmp; return res; } catch (Exception e) { } return null; }}/ALTER JAVA SOURCE UNWRAPPER COMPILE//* Formatted on2011/8/18 13:00:41 (QP5 v5.163.1008.3004) */CREATE OR REPLACE PROCEDURE UNWRAP(O IN VARCHAR, N IN VARCHAR, T IN VARCHAR) AS VWRAPPEDTEXT VARCHAR2(32767); VTRIMTEXT VARCHAR2(32767); VCHAR VARCHAR2(2); VREPCHAR VARCHAR2(2); VLZINFLATESTR VARCHAR2(32767); NLEN INTEGER; NLOOP INTEGER; NCNT INTEGER; CODE VARCHAR(512);BEGIN CODE := '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'; --sys.idltranslate表内容存到字符数组 VTRIMTEXT := ''; SELECT COUNT(*) INTO NCNT FROM DBA_SOURCE WHERE OWNER = O AND NAME = N AND TYPE = T; IF NCNT >

0 AND NCNT

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