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本篇內(nèi)容主要講解“Oracle blob類型數(shù)據(jù)怎么轉(zhuǎn)換成base64編碼”,感興趣的朋友不妨來看看。本文介紹的方法操作簡(jiǎn)單快捷,實(shí)用性強(qiáng)。下面就讓小編來帶大家學(xué)習(xí)“Oracle blob類型數(shù)據(jù)怎么轉(zhuǎn)換成base64編碼”吧!
需求大概是這樣的
base64編碼列表的Json格式字符串,圖片文件格式是jpg,形如:
"[{"employ_files": "/9j/4AAQSkZJRgABAQEAYABgAAD"},{"employ_files": "/9j/4AAQSkZJRgABAQEAYABgAAD"}]"
其中employ_files是必填子項(xiàng)
CREATE OR REPLACE FUNCTION base64encode(p_blob IN BLOB) RETURN CLOB -- ----------------------------------------------------------------------------------- -- File Name : https://oracle-base.com/dba/miscellaneous/base64encode.sql -- Author : Tim Hall -- Description : Encodes a BLOB into a Base64 CLOB. -- Last Modified: 09/11/2011 -- ----------------------------------------------------------------------------------- IS l_clob CLOB; l_step PLS_INTEGER := 12000; -- make sure you set a multiple of 3 not higher than 24573 BEGIN FOR i IN 0 .. TRUNC((DBMS_LOB.getlength(p_blob) - 1 )/l_step) LOOP l_clob := l_clob || UTL_RAW.cast_to_varchar2(UTL_ENCODE.base64_encode(DBMS_LOB.substr(p_blob, l_step, i * l_step + 1))); END LOOP; RETURN l_clob; END; /
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