java實(shí)現(xiàn)調(diào)用http請求的五種常見方式
更新時(shí)間：2024年07月18日 11:50:43 作者：老周聊架構(gòu)
在實(shí)際開發(fā)過程中,我們經(jīng)常需要調(diào)用對方提供的接口或測試自己寫的接口是否合適,本文主要介紹了java實(shí)現(xiàn)調(diào)用http請求的四種常見方式,感興趣的可以了解一下
一、概述
在實(shí)際開發(fā)過程中，我們經(jīng)常需要調(diào)用對方提供的接口或測試自己寫的接口是否合適。很多項(xiàng)目都會(huì)封裝規(guī)定好本身項(xiàng)目的接口規(guī)范，所以大多數(shù)需要去調(diào)用對方提供的接口或第三方接口（短信、天氣等）。
在Java項(xiàng)目中調(diào)用第三方接口的方式有：
1、通過JDK網(wǎng)絡(luò)類Java.net.HttpURLConnection；
2、通過common封裝好的HttpClient；
3、通過Apache封裝好的CloseableHttpClient；
4、通過SpringBoot-RestTemplate；
二、 Java調(diào)用第三方http接口的方式
2.1、通過JDK網(wǎng)絡(luò)類Java.net.HttpURLConnection
比較原始的一種調(diào)用做法，這里把get請求和post請求都統(tǒng)一放在一個(gè)方法里面。
實(shí)現(xiàn)過程：
GET:
1、創(chuàng)建遠(yuǎn)程連接
2、設(shè)置連接方式（get、post、put。。。）
3、設(shè)置連接超時(shí)時(shí)間
4、設(shè)置響應(yīng)讀取時(shí)間
5、發(fā)起請求
6、獲取請求數(shù)據(jù)
7、關(guān)閉連接
POST:
1、創(chuàng)建遠(yuǎn)程連接
2、設(shè)置連接方式（get、post、put。。。）
3、設(shè)置連接超時(shí)時(shí)間
4、設(shè)置響應(yīng)讀取時(shí)間
5、當(dāng)向遠(yuǎn)程服務(wù)器傳送數(shù)據(jù)/寫數(shù)據(jù)時(shí)，需要設(shè)置為true（setDoOutput）
6、當(dāng)前向遠(yuǎn)程服務(wù)讀取數(shù)據(jù)時(shí)，設(shè)置為true，該參數(shù)可有可無（setDoInput）
7、設(shè)置傳入?yún)?shù)的格式:（setRequestProperty）
8、設(shè)置鑒權(quán)信息：Authorization:（setRequestProperty）
9、設(shè)置參數(shù)
10、發(fā)起請求
11、獲取請求數(shù)據(jù)
12、關(guān)閉連接
直接上代碼：
package com.riemann.springbootdemo.util.common.httpConnectionUtil;
import org.springframework.lang.Nullable;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
/**
* @author riemann
* @date 2019/05/24 23:42
*/
public class HttpURLConnectionUtil {
/**
* Http get請求
* @param httpUrl 連接
* @return 響應(yīng)數(shù)據(jù)
*/
public static String doGet(String httpUrl){
//鏈接
HttpURLConnection connection = null;
InputStream is = null;
BufferedReader br = null;
StringBuffer result = new StringBuffer();
try {
//創(chuàng)建連接
URL url = new URL(httpUrl);
connection = (HttpURLConnection) url.openConnection();
//設(shè)置請求方式
connection.setRequestMethod("GET");
//設(shè)置連接超時(shí)時(shí)間
connection.setReadTimeout(15000);
//開始連接
connection.connect();
//獲取響應(yīng)數(shù)據(jù)
if (connection.getResponseCode() == 200) {
//獲取返回的數(shù)據(jù)
is = connection.getInputStream();
if (null != is) {
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
String temp = null;
while (null != (temp = br.readLine())) {
result.append(temp);
}
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != br) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != is) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//關(guān)閉遠(yuǎn)程連接
connection.disconnect();
}
return result.toString();
}
/**
* Http post請求
* @param httpUrl 連接
* @param param 參數(shù)
* @return
*/
public static String doPost(String httpUrl, @Nullable String param) {
StringBuffer result = new StringBuffer();
//連接
HttpURLConnection connection = null;
OutputStream os = null;
InputStream is = null;
BufferedReader br = null;
try {
//創(chuàng)建連接對象
URL url = new URL(httpUrl);
//創(chuàng)建連接
connection = (HttpURLConnection) url.openConnection();
//設(shè)置請求方法
connection.setRequestMethod("POST");
//設(shè)置連接超時(shí)時(shí)間
connection.setConnectTimeout(15000);
//設(shè)置讀取超時(shí)時(shí)間
connection.setReadTimeout(15000);
//DoOutput設(shè)置是否向httpUrlConnection輸出，DoInput設(shè)置是否從httpUrlConnection讀入，此外發(fā)送post請求必須設(shè)置這兩個(gè)
//設(shè)置是否可讀取
connection.setDoOutput(true);
connection.setDoInput(true);
//設(shè)置通用的請求屬性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
//拼裝參數(shù)
if (null != param && param.equals("")) {
//設(shè)置參數(shù)
os = connection.getOutputStream();
//拼裝參數(shù)
os.write(param.getBytes("UTF-8"));
}
//設(shè)置權(quán)限
//設(shè)置請求頭等
//開啟連接
//connection.connect();
//讀取響應(yīng)
if (connection.getResponseCode() == 200) {
is = connection.getInputStream();
if (null != is) {
br = new BufferedReader(new InputStreamReader(is, "GBK"));
String temp = null;
while (null != (temp = br.readLine())) {
result.append(temp);
result.append("\r\n");
}
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
//關(guān)閉連接
if(br!=null){
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(os!=null){
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(is!=null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//關(guān)閉連接
connection.disconnect();
}
return result.toString();
}
public static void main(String[] args) {
String message = doPost("https://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=13026194071", "");
System.out.println(message);
}
}
運(yùn)行結(jié)果：
2.2 通過apache common封裝好的HttpClient
httpClient的get或post請求方式步驟：
- 生成一個(gè)HttpClient對象并設(shè)置相應(yīng)的參數(shù)；
- 生成一個(gè)GetMethod對象或PostMethod并設(shè)置響應(yīng)的參數(shù)；
- 用HttpClient生成的對象來執(zhí)行GetMethod生成的Get方法；
- 處理響應(yīng)狀態(tài)碼；
- 若響應(yīng)正常，處理HTTP響應(yīng)內(nèi)容；
- 釋放連接。
導(dǎo)入如下jar包：
<!--HttpClient-->
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
<!--fastjson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.32</version>
</dependency>
代碼如下：
package com.riemann.springbootdemo.util.common.httpConnectionUtil;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import java.io.IOException;
/**
* @author riemann
* @date 2019/05/25 0:58
*/
public class HttpClientUtil {
/**
* httpClient的get請求方式
* 使用GetMethod來訪問一個(gè)URL對應(yīng)的網(wǎng)頁實(shí)現(xiàn)步驟：
* 1.生成一個(gè)HttpClient對象并設(shè)置相應(yīng)的參數(shù)；
* 2.生成一個(gè)GetMethod對象并設(shè)置響應(yīng)的參數(shù)；
* 3.用HttpClient生成的對象來執(zhí)行GetMethod生成的Get方法；
* 4.處理響應(yīng)狀態(tài)碼；
* 5.若響應(yīng)正常，處理HTTP響應(yīng)內(nèi)容；
* 6.釋放連接。
* @param url
* @param charset
* @return
*/
public static String doGet(String url, String charset) {
//1.生成HttpClient對象并設(shè)置參數(shù)
HttpClient httpClient = new HttpClient();
//設(shè)置Http連接超時(shí)為5秒
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
//2.生成GetMethod對象并設(shè)置參數(shù)
GetMethod getMethod = new GetMethod(url);
//設(shè)置get請求超時(shí)為5秒
getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
//設(shè)置請求重試處理，用的是默認(rèn)的重試處理：請求三次
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
String response = "";
//3.執(zhí)行HTTP GET 請求
try {
int statusCode = httpClient.executeMethod(getMethod);
//4.判斷訪問的狀態(tài)碼
if (statusCode != HttpStatus.SC_OK) {
System.err.println("請求出錯(cuò)：" + getMethod.getStatusLine());
}
//5.處理HTTP響應(yīng)內(nèi)容
//HTTP響應(yīng)頭部信息，這里簡單打印
Header[] headers = getMethod.getResponseHeaders();
for(Header h : headers) {
System.out.println(h.getName() + "---------------" + h.getValue());
}
//讀取HTTP響應(yīng)內(nèi)容，這里簡單打印網(wǎng)頁內(nèi)容
//讀取為字節(jié)數(shù)組
byte[] responseBody = getMethod.getResponseBody();
response = new String(responseBody, charset);
System.out.println("-----------response:" + response);
//讀取為InputStream，在網(wǎng)頁內(nèi)容數(shù)據(jù)量大時(shí)候推薦使用
//InputStream response = getMethod.getResponseBodyAsStream();
} catch (HttpException e) {
//發(fā)生致命的異常，可能是協(xié)議不對或者返回的內(nèi)容有問題
System.out.println("請檢查輸入的URL!");
e.printStackTrace();
} catch (IOException e) {
//發(fā)生網(wǎng)絡(luò)異常
System.out.println("發(fā)生網(wǎng)絡(luò)異常!");
} finally {
//6.釋放連接
getMethod.releaseConnection();
}
return response;
}
/**
* post請求
* @param url
* @param json
* @return
*/
public static String doPost(String url, JSONObject json){
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(url);
postMethod.addRequestHeader("accept", "*/*");
postMethod.addRequestHeader("connection", "Keep-Alive");
//設(shè)置json格式傳送
postMethod.addRequestHeader("Content-Type", "application/json;charset=GBK");
//必須設(shè)置下面這個(gè)Header
postMethod.addRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
//添加請求參數(shù)
postMethod.addParameter("commentId", json.getString("commentId"));
String res = "";
try {
int code = httpClient.executeMethod(postMethod);
if (code == 200){
res = postMethod.getResponseBodyAsString();
System.out.println(res);
}
} catch (IOException e) {
e.printStackTrace();
}
return res;
}
public static void main(String[] args) {
System.out.println(doGet("http://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=13026194071", "GBK"));
System.out.println("-----------分割線------------");
System.out.println("-----------分割線------------");
System.out.println("-----------分割線------------");
JSONObject jsonObject = new JSONObject();
jsonObject.put("commentId", "13026194071");
System.out.println(doPost("http://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=13026194071", jsonObject));
}
}
運(yùn)行結(jié)果：
post請求的jsonObject 的參數(shù)也成功寫入
2.3 通過Apache封裝好的CloseableHttpClient
CloseableHttpClient是在HttpClient的基礎(chǔ)上修改更新而來的，這里還涉及到請求頭token的設(shè)置（請求驗(yàn)證），利用fastjson轉(zhuǎn)換請求或返回結(jié)果字符串為json格式，當(dāng)然上面兩種方式也是可以設(shè)置請求頭token、json的，這里只在下面說明。
導(dǎo)入如下jar包：
<!--CloseableHttpClient-->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<!--fastjson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.32</version>
</dependency>
代碼如下：
package com.riemann.springbootdemo.util.common.httpConnectionUtil;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
/**
* @author riemann
* @date 2019/05/25 1:35
*/
public class CloseableHttpClientUtil {
private static String tokenString = "";
private static String AUTH_TOKEN_EXPIRED = "AUTH_TOKEN_EXPIRED";
private static CloseableHttpClient httpClient = null;
/**
* 以get方式調(diào)用第三方接口
* @param url
* @param token
* @return
*/
public static String doGet(String url, String token) {
//創(chuàng)建HttpClient對象
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpGet httpGet = new HttpGet(url);
if (null != tokenString && !tokenString.equals("")) {
tokenString = getToken();
}
//api_gateway_auth_token自定義header頭，用于token驗(yàn)證使用
httpGet.addHeader("api_gateway_auth_token",tokenString);
httpGet.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
try {
HttpResponse response = httpClient.execute(httpGet);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
//返回json格式
String res = EntityUtils.toString(response.getEntity());
return res;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 以post方式調(diào)用第三方接口
* @param url
* @param json
* @return
*/
public static String doPost(String url, JSONObject json) {
if (null == httpClient) {
httpClient = HttpClientBuilder.create().build();
}
HttpPost httpPost = new HttpPost(url);
if (null != tokenString && tokenString.equals("")) {
tokenString = getToken();
}
//api_gateway_auth_token自定義header頭，用于token驗(yàn)證使用
httpPost.addHeader("api_gateway_auth_token", tokenString);
httpPost.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
try {
StringEntity se = new StringEntity(json.toString());
se.setContentEncoding("UTF-8");
//發(fā)送json數(shù)據(jù)需要設(shè)置contentType
se.setContentType("application/x-www-form-urlencoded");
//設(shè)置請求參數(shù)
httpPost.setEntity(se);
HttpResponse response = httpClient.execute(httpPost);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
//返回json格式
String res = EntityUtils.toString(response.getEntity());
return res;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
/**
* 獲取第三方接口的token
*/
public static String getToken() {
String token = "";
JSONObject object = new JSONObject();
object.put("appid", "appid");
object.put("secretkey", "secretkey");
if (null == httpClient) {
httpClient = HttpClientBuilder.create().build();
}
HttpPost httpPost = new HttpPost("http://localhost/login");
httpPost.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
try {
StringEntity se = new StringEntity(object.toString());
se.setContentEncoding("UTF-8");
//發(fā)送json數(shù)據(jù)需要設(shè)置contentType
se.setContentType("application/x-www-form-urlencoded");
//設(shè)置請求參數(shù)
httpPost.setEntity(se);
HttpResponse response = httpClient.execute(httpPost);
//這里可以把返回的結(jié)果按照自定義的返回?cái)?shù)據(jù)結(jié)果，把string轉(zhuǎn)換成自定義類
//ResultTokenBO result = JSONObject.parseObject(response, ResultTokenBO.class);
//把response轉(zhuǎn)為jsonObject
JSONObject result = (JSONObject) JSONObject.parseObject(String.valueOf(response));
if (result.containsKey("token")) {
token = result.getString("token");
}
} catch (IOException e) {
e.printStackTrace();
}
return token;
}
/**
* 測試
*/
public static void test(String telephone) {
JSONObject object = new JSONObject();
object.put("telephone", telephone);
//首先獲取token
tokenString = getToken();
String response = doPost("http://localhost/searchUrl", object);
//如果返回的結(jié)果是list形式的，需要使用JSONObject.parseArray轉(zhuǎn)換
//List<Result> list = JSONObject.parseArray(response, Result.class);
System.out.println(response);
}
public static void main(String[] args) {
test("12345678910");
}
}
2.4 通過SpringBoot-RestTemplate
springBoot-RestTemple是上面三種方式的集大成者，代碼編寫更加簡單，目前可以采用的調(diào)用第三方接口有：
- delete() 在特定的URL上對資源執(zhí)行HTTP DELETE操作
- exchange() 在URL上執(zhí)行特定的HTTP方法，返回包含對象的ResponseEntity，這個(gè)對象是從響應(yīng)體中映射得到的
- execute() 在URL上執(zhí)行特定的HTTP方法，返回一個(gè)從響應(yīng)體映射得到的對象
- getForEntity() 發(fā)送一個(gè)HTTP GET請求，返回的ResponseEntity包含了響應(yīng)體所映射成的對象
- getForObject() 發(fā)送一個(gè)HTTP GET請求，返回的請求體將映射為一個(gè)對象
- postForEntity() POST 數(shù)據(jù)到一個(gè)URL，返回包含一個(gè)對象的ResponseEntity，這個(gè)對象是從響應(yīng)體中映射得到的
- postForObject() POST 數(shù)據(jù)到一個(gè)URL，返回根據(jù)響應(yīng)體匹配形成的對象
- headForHeaders() 發(fā)送HTTP HEAD請求，返回包含特定資源URL的HTTP頭
- optionsForAllow() 發(fā)送HTTP OPTIONS請求，返回對特定URL的Allow頭信息
- postForLocation() POST 數(shù)據(jù)到一個(gè)URL，返回新創(chuàng)建資源的URL
- put() PUT 資源到特定的URL
注意：目前標(biāo)粗的為常用的
首先導(dǎo)入springboot的web包
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencies>
<!--CloseableHttpClient-->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<!--spring restTemplate-->
<!-- @ConfigurationProperties annotation processing (metadata for IDEs)
生成spring-configuration-metadata.json類，需要引入此類-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
在啟動(dòng)類同包下創(chuàng)建RestTemplateConfig.java類
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
/**
* @author riemann
* @date 2019/05/25 2:16
*/
@Configuration
public class RestTemplateConfig {
@Bean
public RestTemplate restTemplate(ClientHttpRequestFactory factory){
return new RestTemplate(factory);
}
@Bean
public ClientHttpRequestFactory simpleClientHttpRequestFactory(){
SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setConnectTimeout(15000);
factory.setReadTimeout(5000);
return factory;
}
}
然后在Service類（RestTemplateToInterface ）中注入使用
具體代碼如下：
import com.alibaba.fastjson.JSONObject;
import com.swordfall.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
/**
* @author riemann
* @date 2019/05/25 2:20
*/
@Service
public class RestTemplateToInterface {
@Autowired
private RestTemplate restTemplate;
/**
* 以get方式請求第三方http接口 getForEntity
* @param url
* @return
*/
public User doGetWith1(String url){
ResponseEntity<User> responseEntity = restTemplate.getForEntity(url, User.class);
User user = responseEntity.getBody();
return user;
}
/**
* 以get方式請求第三方http接口 getForObject
* 返回值返回的是響應(yīng)體，省去了我們再去getBody()
* @param url
* @return
*/
public User doGetWith2(String url){
User user = restTemplate.getForObject(url, User.class);
return user;
}
/**
* 以post方式請求第三方http接口 postForEntity
* @param url
* @return
*/
public String doPostWith1(String url){
User user = new User("小白", 20);
ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, user, String.class);
String body = responseEntity.getBody();
return body;
}
/**
* 以post方式請求第三方http接口 postForEntity
* @param url
* @return
*/
public String doPostWith2(String url){
User user = new User("小白", 20);
String body = restTemplate.postForObject(url, user, String.class);
return body;
}
/**
* exchange
* @return
*/
public String doExchange(String url, Integer age, String name){
//header參數(shù)
HttpHeaders headers = new HttpHeaders();
String token = "asdfaf2322";
headers.add("authorization", token);
headers.setContentType(MediaType.APPLICATION_JSON);
//放入body中的json參數(shù)
JSONObject obj = new JSONObject();
obj.put("age", age);
obj.put("name", name);
//組裝
HttpEntity<JSONObject> request = new HttpEntity<>(obj, headers);
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, request, String.class);
String body = responseEntity.getBody();
return body;
}
}
2021.3.14 更新
應(yīng)大家的響應(yīng)，okhttp 現(xiàn)在也是蠻流行的，基于手機(jī)端很火，這里分享一下OkHttpClient客戶端，業(yè)務(wù)代碼get、post請求直接調(diào)用就好哈。
2.5 通過okhttp
pom文件引入依賴包
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.10.0</version>
</dependency>
@Slf4j
public class OkHttpClient {
private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
private volatile static okhttp3.OkHttpClient client;
private static final int MAX_IDLE_CONNECTION = Integer
.parseInt(ConfigManager.get("httpclient.max_idle_connection"));
private static final long KEEP_ALIVE_DURATION = Long
.parseLong(ConfigManager.get("httpclient.keep_alive_duration"));
private static final long CONNECT_TIMEOUT = Long.parseLong(ConfigManager.get("httpclient.connectTimeout"));
private static final long READ_TIMEOUT = Long.parseLong(ConfigManager.get("httpclient. "));
/**
* 單例模式(雙重檢查模式) 獲取類實(shí)例
*
* @return client
*/
private static okhttp3.OkHttpClient getInstance() {
if (client == null) {
synchronized (okhttp3.OkHttpClient.class) {
if (client == null) {
client = new okhttp3.OkHttpClient.Builder()
.connectTimeout(CONNECT_TIMEOUT, TimeUnit.SECONDS)
.readTimeout(READ_TIMEOUT, TimeUnit.SECONDS)
.connectionPool(new ConnectionPool(MAX_IDLE_CONNECTION, KEEP_ALIVE_DURATION,
TimeUnit.MINUTES))
.build();
}
}
}
return client;
}
public static String syncPost(String url, String json) throws IOException {
RequestBody body = RequestBody.create(JSON, json);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
try {
Response response = OkHttpClient.getInstance().newCall(request).execute();
if (response.isSuccessful()) {
String result = response.body().string();
log.info("syncPost response = {}, responseBody= {}", response, result);
return result;
}
String result = response.body().string();
log.info("syncPost response = {}, responseBody= {}", response, result);
throw new IOException("三方接口返回http狀態(tài)碼為" + response.code());
} catch (Exception e) {
log.error("syncPost() url:{} have a ecxeption {}", url, e);
throw new RuntimeException("syncPost() have a ecxeption {}" + e.getMessage());
}
}
public static String syncGet(String url, Map<String, Object> headParamsMap) throws IOException {
Request request;
final Request.Builder builder = new Request.Builder().url(url);
try {
if (!CollectionUtils.isEmpty(headParamsMap)) {
final Iterator<Map.Entry<String, Object>> iterator = headParamsMap.entrySet()
.iterator();
while (iterator.hasNext()) {
final Map.Entry<String, Object> entry = iterator.next();
builder.addHeader(entry.getKey(), (String) entry.getValue());
}
}
request = builder.build();
Response response = OkHttpClient.getInstance().newCall(request).execute();
String result = response.body().string();
log.info("syncGet response = {},responseBody= {}", response, result);
if (!response.isSuccessful()) {
throw new IOException("三方接口返回http狀態(tài)碼為" + response.code());
}
return result;
} catch (Exception e) {
log.error("remote interface url:{} have a ecxeption {}", url, e);
throw new RuntimeException("三方接口返回異常");
}
}
}到此這篇關(guān)于java實(shí)現(xiàn)調(diào)用http請求的五種常見方式的文章就介紹到這了,更多相關(guān)java 調(diào)用http請求內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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