首先定义共通文件，根据url连接Java后台

class ConntectUtil
{public JObject ConsoleApplication(string appID, CustomDataType.HttpMethod method, string strJson){String strResponse = "";HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(url + appID));//POST或PUTswitch (method){case Method.POST://设置参数var jsonParse = JObject.Parse(strJson);String jsonParam = "strJson=" + jsonParse.ToString();byte[] buff = System.Text.Encoding.UTF8.GetBytes(jsonParam);//设置请求信息request.Method = CustomDataType.HttpMethod.POST.ToString();request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";request.ContentLength = buff.Length;Stream stream = request.GetRequestStream();stream.Write(buff, 0, buff.Length);stream.Dispose();WebResponse response = request.GetResponse();StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);strResponse = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾stream.Close();response.Close();break;case Method.GET:WebResponse myResponse = request.GetResponse();StreamReader myReader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);strResponse = myReader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾myReader.Close();myResponse.Close();break;}return (JObject)JsonConvert.DeserializeObject(strResponse);}
}

带参数的请求后台获取数据。

ConntectUtil conntectUtil = new ConntectUtil();//设置参数
Temp temp = new Temp();
temp.Id = 1;
//格式化成JSON格式
String strJson = JsonConvert.SerializeObject(temp);
//获取返回数据
JObject retJson = commonUtil.ConsoleApplication(ConfigurationManager.AppSettings["url"], CustomDataType.HttpMethod.POST, strJson);
//（第二种写法）JObject retJson = commonUtil.ConsoleApplication(url, POST, strJson);

在请求后台功能中，常常需要对返回的数据进行处理后赋值，本文将讲解两种赋值方法：
首先，获取返回的JSON数据

//获取数据
string jsonData = JsonConvert.SerializeObject(retJson.GetValue("data"));

1.直接给DataGridView绑定数据

//禁止根据返回数据自动生成列
this.DataGridView.AutoGenerateColumns = false;
//绑定数据源
this.DataGridView.DataSource = retJson.GetValue("data");

2.转成list后做遍历处理

//转化为list
JavaScriptSerializer Serializer = new JavaScriptSerializer();
List<Temp1> objs = Serializer.Deserialize<List<Temp1>>(jsonData);