在NSString中发布两个键值对

Question

我试图在NSURLCconnection中使用POST在服务器上发布登录信息。我必须设置两个键值对作为emailIdSignIn:[e-mail]和passwordSignIn:xxxxxxx。但问题是，我只得到服务器上的emailIdSignIn值和emailIdSignIn字段中附加的passwordSignIn值，passwordSignIn为nil。我也尝试过NSDictionary，但在这种情况下，在两个领域都获得null。我不能更改服务器端代码。这是我的密码客户端

 /* 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

From Wiki:

当web浏览器从web表单元素发送POST请求时默认的互联网媒体类型是"application/x-www-form-urlencoded"。[8]这是一种编码可能重复的键值对的格式钥匙。每个键值对由'&'字符分隔，并且每个键与它的值之间用'='字符分隔。键和值都通过用'+'字符替换空格来转义，然后在所有其他非字母数字[9]字符上使用URL编码。

所以你需要使用&字符而不是,:

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