okhttp3发送请求

引入okhttp3的依赖

<dependencies><!--ok3http--><dependency><groupId>com.squareup.okhttp3</groupId><artifactId>okhttp</artifactId><version>3.10.0</version></dependency>
</dependencies>

工具类

package com.ymx.platform.common.util;
import okhttp3.*;
import okhttp3.Request.Builder;
import org.springframework.util.CollectionUtils;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Collections;
import java.util.Map;/*** @Auther: jiang* @Date: 2022/10/20 15:56* @Description:ok3http工具类*/
public class OkHttpClientUtil {private final static OkHttpClient okHttpClient = new OkHttpClient();/*** get请求** @param url* @param headerMap* @return* @throws Exception*/public static String get(String url, Map<String, String> headerMap) throws Exception {Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(headerMap)) {headerMap.forEach((name, value) -> builder.addHeader(name, value));}Request request = builder.build();ResponseBody body = okHttpClient.newCall(request).execute().body();return body.string();}/**** @param url* @return*/public static String getResult(String url) {OkHttpClient okHttpClient = new OkHttpClient();Request request = new Request.Builder().url(url).build();Call call = okHttpClient.newCall(request);try {Response response = call.execute();String string = response.body().string();return string;} catch (IOException e) {e.printStackTrace();}return null;}/*** get 请求** @param url* @param headerMap* @return* @throws Exception*/public static String getData(String url, Map<String, String> headerMap) throws Exception {OkHttpClient okHttpClient = new OkHttpClient();Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(headerMap)) {headerMap.forEach((name, value) -> builder.addHeader(name, value));}Call call = okHttpClient.newCall(builder.build());try {Response response = call.execute();String string = response.body().string();return string;} catch (IOException e) {e.printStackTrace();}return null;}/*** post 请求*/public static String postData(String url, String json, Map<String, String> headerMap) throws Exception {RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), json);Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(headerMap)) {headerMap.forEach(builder::addHeader);}Request request = builder.post(requestBody).build();ResponseBody body = okHttpClient.newCall(request).execute().body();return resolver(body);}public static String postUrlencoded(String url, String json, Map<String, String> headerMap) throws Exception {RequestBody requestBody = RequestBody.create(MediaType.parse("application/x-www-form-urlencoded"), json);Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(headerMap)) {headerMap.forEach(builder::addHeader);}Request request = builder.post(requestBody).build();ResponseBody body = okHttpClient.newCall(request).execute().body();return resolver(body);}public static InputStream postDataByPdf(String url, String json, Map<String, String> headerMap) throws Exception {RequestBody requestBody = RequestBody.create(MediaType.parse("application/x-www-form-urlencoded"), json);Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(headerMap)) {headerMap.forEach(builder::addHeader);}Request request = builder.post(requestBody).build();ResponseBody body = okHttpClient.newCall(request).execute().body();return body.byteStream();}/*** put 请求** @param url* @param reqbody* @param map* @return*/public static String putData(String url, String reqbody, Map<String, String> map) {RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqbody);Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(map)) {map.forEach((name, value) -> builder.addHeader(name, value));}Request request = builder.put(requestBody).build();try {ResponseBody body = okHttpClient.newCall(request).execute().body();return resolver(body);} catch (IOException e) {e.printStackTrace();}return null;}/*** delete 请求** @param url* @param reqbody* @param map* @return*/public static String deleteData(String url, String reqbody, Map<String, String> map) {OkHttpClient okHttpClient = new OkHttpClient();Builder builder = new Request.Builder().url(url);if (!CollectionUtils.isEmpty(map)) {map.forEach((name, value) -> builder.addHeader(name, value));}Call call = okHttpClient.newCall(builder.build());try {Response response = call.execute();String string = response.body().string();return string;} catch (IOException e) {e.printStackTrace();}return null;}/*** 解析返回值** @param responseBody* @return*/private static String resolver(ResponseBody responseBody) {InputStream is = null;String result = null;try {is = responseBody.byteStream();BufferedReader br = new BufferedReader(new InputStreamReader(is, "utf-8"));String body = null;StringBuilder sb = new StringBuilder();while ((body = br.readLine()) != null) {sb.append(body);}is.close();result = sb.toString();} catch (Exception e) {e.printStackTrace();} finally {try {if (is != null) {is.close();}} catch (Exception e) {e.printStackTrace();}}return result;}}

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