ios - 在NSString中发布两个键值对

Question

我正在尝试使用POST中的NSURLCconnection将登录信息发布到服务器上。我必须将两个键值对设置为emailIdSignIn:abc@def.com和passwordSignIn:xxxxxxx。但是问题是，我在服务器上仅获得emailIdSignIn值，并在passwordSignIn字段中附加了emailIdSignIn的值，而passwordSignIn为nil。我也尝试过NSDictionary，但在那种情况下在两个字段中都得到了null。我无法更改服务器端代码。这是我的代码
客户端

 /* initiating request with the url */
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.1.2:8080/referamaid/app/noauth/serviceconsumer/login"]];

    NSString *loginData = [NSString stringWithFormat:@"emailIdSignIn=%@,passwordSignIn=%@",[self.emailTextField text],[self.passwordTextField text],nil];

    NSLog(@"login data = %@", loginData);


    NSData *postData = [loginData dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    NSError *error;

    NSString *postLength = [NSString stringWithFormat:@"%lu", [postData length]];

    /* specify the request type */

    [request setHTTPMethod:@"POST"];


    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

    /* set the data to be posted on server into body for "POST"*/

    [request setHTTPBody:postData];

    NSLog(@"posted data = %@", postData);

    /* inititate connection between app and server*/

    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO];
    [connection scheduleInRunLoop:[NSRunLoop mainRunLoop]
                          forMode:NSDefaultRunLoopMode];

    [connection start];
    if(!connection)
    {
        // Release the receivedData object.

        receivedData = nil;

        // Inform the user that the connection failed.
    }
}
}

服务器端代码

@RequestMapping(value = "noauth/serviceconsumer/login"  , method=RequestMethod.POST)
public String noAuthScLogin(HttpServletRequest request) {
    String retVal = null;
    ObjectMapper objectMapper = new ObjectMapper();
    try {
        userAgent = request.getHeader("User-Agent");

        String emailId = request.getParameter("emailIdSignIn");
        String password = request.getParameter("passwordSignIn");
}
}

Answer 1

从Wiki:

当网络浏览器从网络表单元素发送POST请求时，
默认的Internet媒体类型为“application / x-www-form-urlencoded”。[8]
这是用于编码可能重复的键/值对的格式
键。每个键值对都由一个'＆'字符分隔，并且每个
键由一个'='字符与其值分隔。键和值
都可以通过用'+'字符代替空格来转义，然后
在所有其他非字母数字[9]字符上使用URL编码。

因此，您需要使用&字符而不是,:

NSString *loginData = [NSString stringWithFormat:@"emailIdSignIn=%@&passwordSignIn=%@",[self.emailTextField text],[self.passwordTextField text]];