Puzzle Day Problem A statement is done ... Go back and dwell.
{$DEFINE UNICODE} in Superobject
That's it, this is the JSON-officially-recommended Delphi processing JSON package, address: http://www.progdigy.com/?page_id=6
Unicode encoding is automatically default in Superobject, and processing Chinese will appear garbled.
Note {$DEFINE UNICODE} is available.
var
J, A:isuperobject;//Can not be tsuperobject, although there are tsuperobject this class, but this is not so unreasonable.
begin
j:=tsuperobject.create (stobject);//Create a JSON object, if the parameter is Starray,j is a JSON array, parameters can also be other variable types, such as strings, values and so on, looks very powerful, But if the argument is a string that describes the JSON, you get an error. If you want to load from text, use J:=SO (JSON text);
j.i[' number ']:=123; is equal to {"number": 123}, similarly, I can also become s,b,c and the like, to represent the string, Boolean, currency type.
j.s[' {string} ']:= ' value ';//This is a bug: There is no effect with curly braces.
a:=tsuperobject.create (Starray);//Create a JSON array a
a.i[']:=111; Represents adding a 111 element to the a array. Notice that the value in [] is ', ' and the semantics of its [] in the array is changed in a subversive way.
a.i[2]:= "S";//3rd element value is "s", well, [] there's a lot of use in Superobject.
j[' arr ']:=a;//Add array A to J, whose key is named Arr
ShowMessage (J.tojson ()); View JSON text for J
J:=nil; Can't write J. Free
end; Let's look at what JSON is .
JSON(JavaScript Object Notation) is a lightweight data interchange format. Easy for people to read and write. It is also easy for machine parsing and generation. It is based on JavaScript programming Language, Standard ECMA-262 a subset of 3rd Edition-december 1999. JSON takes a completely language-independent text format, but also uses a similar idiom to the C language family (c, C + +, C #, Java, Delphi,javascript, Perl, Python, etc.). These features make JSON an ideal data exchange language.
in http://www.json.org/json-zh.html, JSON support for a variety of languages has been provided.
As you can see from its name, JSON was originally derived from JavaScript, and it was simple and clear to manipulate JSON data in JavaScript. You can use JSON data just like you do with class objects, such as
//example1:
jdata =http://blog.soso.com/qz.q/{"name": "Lao Wang", "Age": "+"};
str1 = jdata.name;//Lao Wang
str2 = jdata["Name"];//Lao Wang
//example2:
jdata =http://blog.soso.com/qz.q/{"name": "Lao Wang", "Age": "+", "address": {"Address1": "Fuzhou", "Address2": "Xiamen"};
str1 = jdata.address.address1;//Fuzhou
str2 = jdata["Address" ["Address1"];//Fuzhou
The version after Delphi2009 has been added to support JSON, no longer requires third-party class library support. But I like with Henri Gourvest development of Superobject, interested can be http://www.progdigy.com/?page_id=6 understand, the latest version is 1.24.
Superobject provides two class library file Superobject.pas,superxmlparser.pas, where Superobject.pas is used to manipulate JSON data, and Superxmlparser.pas is used to parse from XML data Out JSON data.
Simple Example
uses superobject;
procedure Tform1.button1click (sender:tobject);
var
Sotest:isuperobject;
begin
sotest: = So (' {' "name": "Zhang San", "Age": "+", "address": {"Address1": "Fuzhou", "Address2": "Xiamen"}} ');
//equivalent method Sotest: = Tsuperobject.parsestring (' {' name ': ' Zhang San ', ' age ': ' + ', ' address ': {"Address1": "Fuzhou", "Address2": "Xiamen "}} ');
showmessage (sotest[' name '). asstring);//Zhang San
ShowMessage (sotest[' address. Address1 ']. asstring);//Fuzhou
end;
The Superobject class library provides a convenient way to manipulate JSON-like data in JavaScript.
==========================================================================================
Here is an example of generating an array:
Procedure Tform3.button1click (Sender:tobject);
Var
Json,arrjson,arr:isuperobject;
I:integer;
Begin
Arrjson:=sa ([]);
Arr:=so ();
For i:=0 to 4 do
Begin
Json: = so;
json.s[' tittle ': = ' bt ' +inttostr (I);
json.i[' classification ']: = I;
json.i[' offercent ']: = I;
json.s[' hints ': = ' DJs ' +inttostr (i);
json.s[' content ': = ' nr ' +inttostr (i);
json.s[' date ': = ' twtime ' +inttostr (i);
json.s[' url ']: = ' wt_filename ' +inttostr (i);
ARRJSON.ASARRAY.ADD (Json);
End
arr.o[' A ']:=arrjson;
Memo1.text:= (arr.asstring);
End
End.
The interpretation of the words in turn is OK!
=======================================================================
procedure Tform1.button5click (sender:tobject);
var
J, A:isuperobject;//Can not be tsuperobject, although there are tsuperobject this class, but this is not so unreasonable. begin
j:=tsuperobject.create (stobject);//Create a JSON pair
j.i[' number ']:=123; equals {"number": 123},.
j.s[' string ']:= ' value ';//This is a bug: There is no effect with curly braces. a:=tsuperobject.create (Starray);//Create a JSON array a
a.i[']:=111; Represents adding a 111 element to the a array. Notice that the value in [] is ', ' and the semantics of its [] in the array is changed in a subversive way.
a.i[' 2 ']:=12;//The 3rd element value is "s", well, [] there's a lot of use in Superobject.
j[' arr ']:=a;//Add array A to J, whose key is named ArrShowMessage (j.asstring ()); View JSON text for J
J:=nil; Can't write J. Free
end;
Tutorial-delphi's Open source JSON library: Superobject, Introduction to Usage
