DAOProxy的代码:下面代码中红色高亮的就是出问题的地方,DAOFactory中会构造一个PersonDAOProxy,调用listPersons或者addPerson显然会导致递归,从而导致MySQL链接数溢出!将高亮处的代码修改为:dao.listPersons().dao.addPerson(person)即可! public class PersonDAOProxy implements IPersonDAO { private DatabaseConnection conn = n
Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 若反转的数溢出,直接返回0 可以用计算结果来判断溢出,也可以用因数来判断 Java代码实现: public class ReverseInteger { public static int reverseInt(int x){ if (x == 0) { return 0; } int
DECLARE CONTINUE HANDLER FOR SQLWARNING, SQLEXCEPTION, NOT FOUND BEGIN GET DIAGNOSTICS CONDITION code_t = MYSQL_ERRNO, msg = MESSAGE_TEXT; ; SET l_step1 = code_t; -- 如果是锁异常 告警 THEN CALL sp_SN_dbwarning(, 'Sp_SN_ChargeBegin0_Acc', 'lock', v_HfSerialid