Thoroughbred Object Cast

It's a very painful problem.

Scene, Hibernate reads data

@Override public  list<object> getranklist (date stime, date etime, int type, int num) {    String hql =        "sel ECT p.content, SUM (p.count) from Profilejudgecount P "            +" where P.type =: Type and p.date between:stime and:etime "            + "GROUP by p.content Order by sum (p.count) desc limit 0," + num;    Return Sessionfactory.getcurrentsession (). CreateQuery (HQL). Setinteger ("type", type).        setDate ("Stime", stime). SetDate ("ETime", etime). List ();  }

Returned is a list of obj ect, the phenomenon of debuggingin Eclipse Environment

Figure one: Directly view the returned List object L, shown below

Figure Two: Click on a specific element, shown below, to see what's inside, a string, a value,

Figure three: Trace view element specific content, is the number of groups, the first element is a string, the second element is a long integer

Positive three, ToString function, get [ljava.lang.object;@9654f70 similar content

Try to convert the elements, using the GetClass function to find that the type is Java.lang.Object, which can only be cast so that the contents are removed

1: Custom entity, entity attribute a string, a long integer, conversion exception

2: Found similar to a jsonarray, conversion exception

3: Convert string[], convert exception

4: Convert list, convert exception

5: Convert serializable, get byte array, turn to string, can see Chinese, but there is garbled

Final conversion object[], success, wish, exhausted

Thoroughbred Object Cast