小编给大家分享一下.Net整合Json如何实现REST服务客户端，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
一. 准备工作
1. 点击官网 或 本地 下载支持.Net4.0 的Json插件 Newtonsoft.Json
2. 找到 %压缩包%\Bin\net40\Newtonsoft.Json.dll ，在工程中引用
二. 相关代码介绍
1. HttpClientUtil.cs 封装REST方法
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
namespace psi.Common
{
public class HttpClientUtil
{
// REST @GET 方法，根据泛型自动转换成实体，支持List
public static T doGetMethodToObj(string url)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "get";
request.ContentType = "application/json;charset=UTF-8";
HttpWebResponse response = null;
try
{
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException e)
{
response = (HttpWebResponse)e.Response;
return default(T);
}
string json = getResponseString(response);
return JsonConvert.DeserializeObject(json);
}
// 将 HttpWebResponse 返回结果转换成 string
private static string getResponseString(HttpWebResponse response)
{
string json = null;
using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")))
{
json = reader.ReadToEnd();
}
return json;
}
// 获取异常信息
private static string getRestErrorMessage(HttpWebResponse errorResponse)
{
string errorhtml = getResponseString(errorResponse);
string errorkey = "UnhandledException:";
errorhtml = errorhtml.Substring(errorhtml.IndexOf(errorkey) + errorkey.Length);
errorhtml = errorhtml.Substring(0, errorhtml.IndexOf("\n"));
return errorhtml;
}
// REST @POST 方法
public static T doPostMethodToObj(string url, string jsonBody)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "post";
request.ContentType = "application/json;charset=UTF-8";
var stream = request.GetRequestStream();
using (var writer = new StreamWriter(stream))
{
writer.Write(jsonBody);
writer.Flush();
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string json = getResponseString(response);
return JsonConvert.DeserializeObject(json);
}
// REST @PUT 方法
public static string doPutMethod(string url)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "put";
request.ContentType = "application/json;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")))
{
return reader.ReadToEnd();
}
}
// REST @PUT 方法，带发送内容主体
public static T doPutMethodToObj(string url, string jsonBody)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "put";
request.ContentType = "application/json;charset=UTF-8";
request.Timeout = 30 * 1000;
var stream = request.GetRequestStream();
using (var writer = new StreamWriter(stream))
{
writer.Write(jsonBody);
writer.Flush();
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string json = getResponseString(response);
return JsonConvert.DeserializeObject(json);
}
// REST @DELETE 方法
public static bool doDeleteMethod(string url)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "delete";
request.ContentType = "application/json;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")))
{
string responseString = reader.ReadToEnd();
if (responseString.Equals("1"))
{
return true;
}
return false;
}
}
}
} 2. 调用REST服务端方法，以Json作为数据格式
////// 取得升级服务端的url地址 /// ///private String getServerUrl() { String result = ""; UpgraderClient upgraderClient = getUpgraderClient(); if (upgraderClient != null) { result += "http://" + upgraderClient.serverIP + ":" + upgraderClient.serverPort + "/upgraderServer/service/upgrade.do"; } return result; } /// /// 测试与升级服务端的连接 /// ///public bool testConnect() { FileRequest fileReq = new FileRequest(); fileReq.type = (int)RequestType.TEST_CONNECT; string jsonData = JsonConvert.SerializeObject(fileReq); FileResponse rep = null; try { rep = HttpClientUtil.doPostMethodToObj (getServerUrl(), jsonData); } catch { throw new Exception("连接远程服务端失败！"); } return rep.status == 200; }
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