ORACLE中如何實現ASCII字符串和16進制串互相轉換
2024-08-29 13:49:46
供稿：網友
ASCII字符串==>16進制串create or replace function AscToHex(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
BEGIN
i:=1;
stmp:='';
for i in 1..length(sIn) loop
sTmp:=sTmptrim(to_char(ascii(substr(sIn,i,1)),'XXXX'));
end loop;
return sTmp;
END;
/16進制串==>ASCII字符串
要區分字符集，以中文字符為例，對于數據庫字符集是中文，要保證能夠正確轉回來，要有所不同。數據庫字符集是中文create or replace function HexToAsc(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
x integer;
BEGIN
i:=1;
stmp:='';
loop
exit when i>length(sIn);
x:=to_number(substr(sIn,i,2),'XXXX');
if x>128 then
sTmp:=sTmpchr(to_number(substr(sIn,i,4),'XXXX'));
i:=i+4;
else
sTmp:=sTmpchr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end if;
end loop;
return sTmp;
END;
/
數據庫字符集是英文create or replace function HexToAsc(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
BEGIN
i:=1;
stmp:='';
loop
exit when i>length(sIn);
sTmp:=sTmpchr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end loop;
return sTmp;
END;
/測試，如下：SQL>select hextoasc(asctohex('你好ABC么')) from dual;
HEXTOASC(ASCTOHEX('你好ABC么'))
------------------------------------------
你好ABC么
