LWTViewController.m

////  LWTViewController.m//  网络编程练习 -- POST-JSON数据////  Created by apple on 14-7-2.//  Copyright (c) 2014年 lwt. All rights reserved.//#import "LWTViewController.h"@interface LWTViewController ()@end@implementation LWTViewController- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    NSURL *url = [NSURL URLWithString:@"http://192.168.1.24:8080/MJServer/resources/order"];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];    request.HTTPMethod = @"POST";    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];    NSDictionary *json = @{                           @"order_id" : @"123",                           @"user_id" : @"456",                           @"shop" : @"Toll"                           };        NSData *data = [NSJSONSerialization dataWithJSONObject:json options:NSJSONWritingPrettyPrinted error:nil];    request.HTTPBody = data;        [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {        NSLog(@"%d", data.length);    }];}@end