ASCII字符串==16进制串
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/bianchengyuyan/)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:=sTmp||trim(to_char(ascii(substr(sIn,i,1)),'XXXX'));
end loop;
return sTmp;
END;
/
16进制串==ASCII字符串
要区分字符集,以中文字符为例,对于数据库字符集是中文,要保证能够正确转回来,要有所不同。
数据库字符集是中文
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 ilength(sIn);
x:=to_number(substr(sIn,i,2),'XXXX');
if x128 then
sTmp:=sTmp||chr(to_number(substr(sIn,i,4),'XXXX'));
i:=i+4;
else
sTmp:=sTmp||chr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end if;
end loop;
return sTmp;
END;
/
数据库字符集是英文
create or replace function HexToAsc(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
BEGIN
i:=1;
stmp:='';
loop
exit when ilength(sIn);
sTmp:=sTmp||chr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end loop;
return sTmp;
END;
/
测试,如下:
SQLselect hextoasc(asctohex('你好ABC么')) from dual;
HEXTOASC(ASCTOHEX('你好ABC么'))
------------------------------------------
你好ABC么