public class record { private datetime timestamp; private string filename; private string cameraid; public record(string timestamp, string filename, string cameraid) { this.timestamp = isodatetimeformat.datetime().parsedatetime(timestamp); this.filename = filename; this.cameraid = cameraid; } //getters & setters (model) ----------------------------------------------------------------------------- public class recordcontroller { @autowired private recordrepository rep; @requestmapping(value="store") public string camera (@requestparam(required=true, value="ts") string timestamp, @requestparam(value="fn",required=true) string filename, @requestparam(value="cam",required=true) string cameraid) { try { record cam = new record(timestamp,filename,cameraid); rep.save(cam); return "ok"; }catch(exception ex){ string errormessage; errormessage = ex + " <== error"; return ("error: " + ex.getmessage());} } @requestmapping(value="li", method=requestmethod.get) public @responsebody list<record> getall() { return rep.findall(); } } (controller) ---------------------------------------------------------------------------- import org.springframework.data.mongodb.repository.mongorepository; public interface recordrepository extends mongorepository<record, string> { } (recpository) the error got is:
failed instantiate hello.record using constructor public hello.record(java.lang.string,java.lang.string,java.lang.string) arguments 2016-06-06t00:19:09.223+08:00,9d9fd7f8f4caec99bce9dff8f4644e41,000000006f4280af
add default constructor
public class record { private datetime timestamp; private string filename; private string cameraid; public record(){} //default constructor public record(string timestamp, string filename, string cameraid) { this.timestamp = isodatetimeformat.datetime().parsedatetime(timestamp); this.filename = filename; this.cameraid = cameraid; } //getter , setter } 