iOS给Java后台传递json格式的数据GBK编码格式处理

今天在一个项目里面后台是个比较老的Java开发人员，编码方式不是utf-8而是gbk格式的，踩了很多坑记录一下给Java传递json数据gbk编码的处理：

 NSString * urlStr = @"http://你的服务器地址";
    
    NSError *error;
    NSDictionary*dic1=@{@"userId":@"110"
                        
                        };
    NSData *jsonData1 = [NSJSONSerialization dataWithJSONObject:dic1 options:0 error:&error];
    NSString *jsonString1 = [[NSString alloc] initWithData:jsonData1 encoding:NSUTF8StringEncoding];
    NSDictionary*body=@{
                        @"data":jsonString1,
                        @"requestCode":@"110"
                        };
    NSError *error1;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:body options:0 error:&error1];
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlStr]];
    [urlRequest setHTTPMethod: @"POST"];
    //转成gbk编码传递给后台
    [urlRequest setHTTPBody:[jsonString dataUsingEncoding:enc]];
    [urlRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    AFHTTPSessionManager *mgr8 = [AFHTTPSessionManager manager];
    mgr8.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/html",@"text/json",@"text/plain",@"text/text",@"text/javascript",nil];
    mgr8.requestSerializer = [AFHTTPRequestSerializer serializer];
    mgr8.responseSerializer = [AFHTTPResponseSerializer serializer];
    
    NSURLSessionDataTask *dataTask = [mgr8 dataTaskWithRequest:urlRequest completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        
        //声明一个gbk编码类型
        NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
        // 使用如下方法 将获取到的数据按照gbkEncoding的方式进行编码，结果将是正常的汉字
        NSString *zhuanHuanHouDeShuJu = [[NSString alloc] initWithData:responseObject encoding:gbkEncoding];
        NSLog(@"%@",zhuanHuanHouDeShuJu);
        //再转换成想要的json数据
        NSData *jsonData = [zhuanHuanHouDeShuJu dataUsingEncoding:NSUTF8StringEncoding];
        NSError *err;
        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                            options:NSJSONReadingMutableContainers
                                                              error:&err];
        NSLog(@"最终的json数据为%@",dic);
        
    }];
    [dataTask resume];

这样就解决了给Java传递gbk编码格式的json数据了