NSMutableURLRequest,在POST方式下传递参数

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原文链接：http://www.cnblogs.com/anmog/archive/2011/03/09/1978621.html

文章标签：

#json

本文介绍了如何在iOS应用中使用NSMutableURLRequest进行网络请求，并通过JSON格式与服务器端交互数据。包括设置请求头、发送GET和POST请求的具体实现，以及处理响应数据的方法。

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NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];    
NSLog(@"Load currentCookie:%@", cookie);
[request setValue:cookie forHTTPHeaderField:@"Cookie"];
[request setURL:[a objectAtIndex:0]];
[request setHTTPMethod:@"GET"];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request 
returningResponse:nil error:nil]; 
[request release];
 

一、iPhone终端代码：
（同步请求）
NSString *post = nil;  
post = [[NSString alloc] initWithFormat:@"message=%@",@"hello,world."];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];  
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];  
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];  
[request setURL:[NSURL URLWithString:@"http://192.168.10.220:18080/data/1.jsp"]];  
[request setHTTPMethod:@"POST"]; 
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];  
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];  
[request setHTTPBody:postData];  
//[NSURLConnection connectionWithRequest:request delegate:self ];  

//同步请求的的代码
//returnData就是返回得到的数据
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningRequest:nil error:nil];

[post release]; 

二、web服务器端代码
<%
String message = request.getParameter("message");
System.out.println("message="+message);
out.println("message="+message);
%>


采用json 格式post 字符串

static NSString *urlString = @"http://192.168.1.103/WebAccess/admin/tablesSync.aspx";
 //static NSString *urlString = @"http://www.google.cn";
 NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlString]];
 NSString *httpBodyString = @"a test string";

 NSMutableArray *arrayData = [[NSMutableArray alloc] init]；

 NSMutableDictionary *dlist = [[NSMutableDictionary alloc] init];
 [dlist setObject:@"tblArea" forKey:@"tableName"]; 
 [dlist setObject:@"2009-10-24 11:20:00" forKey:@"lastChangeDate"];
 [arrayData addObject:dlist];

 //[request setHTTPBody:[httpBodyString dataUsingEncoding:NSUTF8StringEncoding]];
 //
   //post = [[NSString alloc] initWithFormat:@"message=%@",@"hello,world."];
httpBodyString = [arrayData JSONRepresentation];
 NSData *postData = [httpBodyString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];  
 [request setHTTPBody:postData]; 
 [request setHTTPMethod:@"POST"];
 //
 NSURLResponse *reponse;
 NSError *error = nil;
 //
 NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&reponse error:&error];
 if (error) {
  NSLog(@"Something wrong: %@",[error description]);
 }else {
  if (responseData) {
   NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
   NSLog(@"get %@",responseString);
  }
 }


NSMutableDictionary *dgetData = [responseString JSONValue];
NSLog(@"dgetData: %@" , [dgetData description]);

[dlist release];
[arrayData release];