查看mysql数据库连接地址的步骤如下:
我们需要准备的材料分别是:电脑、mysql查询工具
①.、首先,打开mysql查询工具.
view sourceprint?
01.
DELIMITER ;
DROP FUNCTION IF EXISTS urlencode;
DELIMITER |
DETERMINISTIC
CONTAINS SQL
①.0.
BEGIN
①.1.
DECLARE pointer INT DEFAULT 1;
IF ISNULL(s) THEN
RETURN NULL;
ELSE
WHILE pointer = length(s) DO
SET c = MID(s,pointer,1);
IF c = ' ' THEN
SET c = '+';
END IF;
SET pointer = pointer + 1;
END while;
END;
|
DROP FUNCTION IF EXISTS urldecode;
DECLARE h1 CHAR(1);
WHILE pointer = LENGTH(s) DO
IF c = '+' THEN
SET c = ' ';
SET h1 = LOWER(MID(s,pointer+1,1));
AND
THEN
当一个字符串经过多次 urlencode 处理之后,可以使用 multiurldecode来解码,它将多次调用 urldecode来解码,直到没有需要解码的字符
DROP FUNCTION IF EXISTS multiurldecode;
REPEAT
SET pr = s;
SELECT urldecode(s) INTO s;
UNTIL pr = s END REPEAT;
RETURN s;
select URL from TABLEA where url not in (select URL from TABLEB where APP_NAME=TABLEA.APP_NAME)
把
context,rs,conn
分别system.ou.println();一下看是那个出现空指针异常,然后再看那个方法出现这个mull!
根据你以上的代码,只能说这么多啦!