object in map converted to Boolean type

After the AJAX request queries the data, the map type is returned,

Resultmap.put ("flag", flag);

After receiving the data to judge, the conversion occurs unexpectedly, causing the page to click the button, the page does not respond, HTTP request reported 404 exception, a irrelevant request response. There is no error in the background.

Check the background code to see that there was an exception when processing the judgment.

null && (String) resultmap.get ("flag"). Equals ("true")

The map is generally stored in string, so take it for granted to convert, not actually,

should be:

NULL &&! Boolean.parseboolean ((Resultmap.get ("flag")). ToString ())

object in map converted to Boolean type