add support for checkbox type filter

As title, add support for checkbox type search filter.

* In Query support

when submit a search form contains:

```
<input type="checkbox" name="search_in_prop" value="prop1" />
<input type="checkbox" name="search_in_prop" value="prop2" />
```

will be convert to sql like:
```
where prop in (prop1, prop2) ... 
```

* encode search parameter bugfix:

`Servlets.encodeParameterStringWithPrefix` : add support for String[] type value