OkHttp3的用法Demo

maven架包导入

<!-- OKHttp3依赖 -->
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.8.1</version>
</dependency>

java代码

package com.asset.utils;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class OkHttpRequest {
public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
OkHttpClient client = new OkHttpClient();
public String get(String url) throws IOException {
Request request = new Request.Builder()
.url(url)
.build();

Response response = client.newCall(request).execute();
return response.body().string();
}

public String post(String url, String json) throws IOException {
RequestBody body = RequestBody.create(JSON, json);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
/*  Call call = client.newCall(request);
call.*/

Response response = client.newCall(request).execute();
return response.body().string();
}
}

调用请求
代码示例：这是调用访问钉钉的开发开放平台

package com.shengtong.asset.assetdetail;
import java.io.IOException;
import com.dingtalk.api.DefaultDingTalkClient;
import com.dingtalk.api.DingTalkClient;
import com.dingtalk.api.request.CorpMessageCorpconversationAsyncsendRequest;
import com.dingtalk.api.response.CorpMessageCorpconversationAsyncsendResponse;
import com.asset.utils.OkHttpRequest;
import com.taobao.api.ApiException;
/**
* Title:DingDingExtensionsUtil.java
* Description:访问钉钉开放接口的工具类
* @author Wu
* @date 2018年3月1日 下午2:41:52
*/
public class DingDingExtensionsUtil {
/**
* 根据corpId，corpSecret调用接口生成accessToken
* @param corpId
* @param corpSecret
* @return
*/
public String getAccessToken(String corpId, String corpSecret) {
//返回的accessToken:String类型的Json串,需解析Json才能拿到里面的accessToken
String accessToken = "";
OkHttpRequest okHttpRequest = new OkHttpRequest();
//生成accessToken的接口URL
String accessTokenUrl = "https://oapi.dingtalk.com/gettoken?corpid="+corpId+"&corpsecret="+corpSecret;
try {
//发送请求
accessToken = okHttpRequest.get(accessTokenUrl);
} catch (IOException e) {
e.printStackTrace();
}
return accessToken;
}
}

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