Qt's QString string segmentation and interception

    It is inevitable to use a segment of a string of characters in a project, so it is often necessary to intercept the string.

    There are two ways to solve this problem:

    First: QString splits the string:

    QString date=dateEdit.toString("yyyy/MM/dd");

   QStringList list = date.split("/");//QString string split function

   

    Second: regex to split the string:

    1. Oracle database:

   Data='12345|rat|male'
   select regexp _substr  (Data, '[^|]+', 1,1) into user ID from hdata;
   select  regexp _substr  (Data, '[^|]+', 1,2 ) into user name from hdata;

   select regexp_substr (Data, '[^|]+', 1,3) into 性别 from hdata;

   2、

   String s = "ab\ncd\nef\\ngh";
   String[] v = s.split("[\n]|([\\\\]n)");