一个小函数：GetItemValueBySplitString

function GetItemValueBySplitString(sSource:string; sItemName:string; cSplitChar1:char; cSplitChar2:char):string;
var
  i, iPos: integer;
  sSrc, sSubItem, sName: string;
  cChar1, cChar2: char;
  ResultList: TStringList;
begin
  sSrc := Trim(sSource);
  sName := Trim(sItemName);
  cChar1 := cSplitChar1;
  cChar2 := cSplitChar2; 
  if (Length(sSrc)=0) or (Length(sName)=0) then
  begin
     Result := '';
     Exit;
  end;
  if pos(cChar1, sSrc) =0 then
  begin
     Result := '';
     Exit;
  end;
  i := 0; iPos := 0;
  ResultList := TStringList.Create;
  try
    ResultList.Delimiter := cChar1;
    ResultList.DelimitedText := sSrc;
    if ResultList.Count > 0 then
    begin
      for i:= 0 to ResultList.Count-1 do
      begin
          sSubItem := ResultList.Strings[i];
          iPos := pos(cChar2, sSubItem);
          if iPos > 0 then
          begin
              if Copy(sSubItem, 1, iPos -1) = sItemName then
              begin
                 Result := Trim(Copy(sSubItem, iPos + 1, Length(sSubItem)));
                 Exit;
              end;
          end;
      end;
    end;
  finally
    FreeAndNil(ResultList);
  end;
end;

//sample:
//var
//   s1: string;
//begin
//   s1 := 'USER_CODE:8888, USER_ROLE:2';
//   ShowMessage(GetItemValueBySplitString(s1, 'USER_CODE', ',', ':'));

有时候可能会用的到，先贴在这。