Question

package json;

import com.google.gson.Gson;

public class JsontoObject {

    public static void main(String[] args) {
        Gson gson = new Gson();
        System.out.println(
                gson.fromJson("{1,Lokesh,Gupta,[ADMIN,MANAGER]}",
                        JsontoObject.class));

    }
}

Answer 1

确实是畸形的。字符串必须用引号括起来。大括号是＆＃34;对象＆＃34;：它们需要键。例如:(不知道这是否有意义）

   #import "ViewController.h"
#import <GoogleMaps/GoogleMaps.h>


@interface ViewController ()<GMSMapViewDelegate>
{
    NSUserDefaults *latitudess;
    NSUserDefaults *longitudess;
    GMSMapView *mapView_;
    UIView *viewForSlider;
    UILabel *labelToShowCurrentRadiusValue;
    NSMutableData *urldata;
    NSInteger *j;
    UIActivityIndicatorView *spinner;

}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    mapView_ = [[GMSMapView alloc] init];

    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:22.595769
                                                            longitude:88.263639
                                                                 zoom:12];


    mapView_ = [GMSMapView mapWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height) camera:camera];
    mapView_.delegate=self;
    mapView_.settings.myLocationButton = YES;
    mapView_.myLocationEnabled = YES;
    [self.view addSubview:mapView_];



    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(22.595769, 88.263639);
    marker.title = @"Howrah";
    marker.snippet = @"Kolkata";
    marker.map = mapView_;



    viewForSlider = [[UIView alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height - 62.0 , self.view.frame.size.width, 62.0)];
    viewForSlider.backgroundColor = [UIColor colorWithWhite:0.9 alpha:0.9];

    [self.view addSubview:viewForSlider];



    labelToShowCurrentRadiusValue =[[UILabel alloc]initWithFrame:CGRectMake(0, 8.0, viewForSlider.frame.size.width, 20.0)];
    labelToShowCurrentRadiusValue.backgroundColor=[UIColor clearColor];
    [labelToShowCurrentRadiusValue setFont:[UIFont systemFontOfSize:15.0]];
    labelToShowCurrentRadiusValue.textAlignment=NSTextAlignmentCenter;
    labelToShowCurrentRadiusValue.textColor=[UIColor colorWithRed:84.0/255.0 green:84.0/255.0 blue:84.0/255.0 alpha:1.0];
    [viewForSlider addSubview:labelToShowCurrentRadiusValue];


    [self startUserTracking];
   [self displayAtm];



spinner = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(135,140,50,50)];
    spinner.color = [UIColor blueColor];
    [spinner startAnimating];
        [self.view addSubview:spinner];


}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];


-(void)startUserTracking
{


    if (mapView_.observationInfo == nil)
    {
        [mapView_ addObserver:self
                   forKeyPath:@"myLocation"
                      options:NSKeyValueObservingOptionNew
                      context:NULL];


        dispatch_async(dispatch_get_main_queue(), ^{
            mapView_.myLocationEnabled = YES;
        });
    }
}

- (void)observeValueForKeyPath:(NSString *)keyPath
                      ofObject:(id)object
                        change:(NSDictionary *)change
                       context:(void *)context
{



    CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey];

    mapView_.camera = [GMSCameraPosition cameraWithTarget:location.coordinate
                                                     zoom:15];

    labelToShowCurrentRadiusValue.text = [NSString stringWithFormat:@"%f , %f", location.coordinate.latitude, location.coordinate.longitude];
    latitudess=[NSUserDefaults standardUserDefaults];
    longitudess=[NSUserDefaults standardUserDefaults];
    [latitudess setFloat:location.coordinate.latitude forKey:@"LATITUDE"];
    [latitudess setFloat:location.coordinate.longitude forKey:@"LONGITUDE"];
    [latitudess synchronize];

    @try {
        [mapView_ removeObserver:self forKeyPath:@"myLocation"];
    } @catch(id exception){

    }

}



-(void)displayAtm
{

    latitudess=[NSUserDefaults standardUserDefaults];

    float retrievedlat=[latitudess floatForKey:@"LATITUDE"];
    float retrievedlong=[latitudess floatForKey:@"LONGITUDE"];
    NSLog(@"detail=%f",retrievedlat);



    NSString *urlforrequest=[NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=%f,%f&radius=500&types=atm&name=atm&key=*******",retrievedlat,retrievedlong];
    NSURL *finalurl=[NSURL URLWithString:urlforrequest];



    urldata=[[NSMutableData alloc]initWithContentsOfURL:finalurl];
    NSError *error;
    id jsonresults=[NSJSONSerialization JSONObjectWithData:urldata options:kNilOptions error:&error];

    NSArray *datarray= [jsonresults objectForKey:@"results"];
    for (int i=0; i<datarray.count; i++)
    {
        GMSMarker *marker=[[GMSMarker alloc]init];
        NSDictionary *geometryretrieved=[[datarray valueForKey:@"geometry"]objectAtIndex:i];
        NSDictionary *coordinatesretrieved=[geometryretrieved valueForKey:@"location"];
        marker.position=CLLocationCoordinate2DMake([[coordinatesretrieved objectForKey:@"lat"] doubleValue], [[coordinatesretrieved objectForKey:@"lng"]doubleValue]);
        marker.title=[[datarray valueForKey:@"name"]objectAtIndex:i];
        marker.map=mapView_;

        [spinner removeFromSuperview];


    }


}

另请参阅JSON规范：http://www.json.org/

线程“main”com.google.gson.JsonSyntaxException中的异常：com.google.gson.stream.MalformedJsonException：

1 个答案: