現在的接口開發，大部分是基於http的請求和處理，現在整理了一份常用的調用方式工具類
package com.xh.oms.common.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class HttpClientUtil {
/**
* 發送post請求，json格式數據
* @param url
* @param params
* @return
*/
public static JSONObject postJsonData(String url,Map<String,String> params){
CloseableHttpClient httpclient = HttpClientUtil.createDefault();
HttpPost httpPost = new HttpPost(url);
httpPost.addHeader("Authorization", "your token"); //認證token
httpPost.addHeader("Content-type","application/json; charset=utf-8");
httpPost.addHeader("User-Agent", "imgfornote");
httpPost.setHeader("Accept", "application/json");
//拼接參數
JSONObject jsonParams = new JSONObject();
for (Map.Entry<String, String> entry : params.entrySet()) {
String key = entry.getKey().toString();
String value = entry.getValue().toString();
jsonParams.put(key, value);
}
//配置請求超時時間
RequestConfig requestConfig = RequestConfig.custom()
.setConnectTimeout(1*60*1000) //設置連接超時時間，單位毫秒
// .setConnectionRequestTimeout(1000) //設置從connect Manager獲取Connection 超時時間，單位毫秒。這個屬性是新加的屬性，因為目前版本是可以共享連接池的。
.setSocketTimeout(3*60*1000).build(); //請求獲取數據的超時時間，單位毫秒。 如果訪問一個接口，多少時間內無法返回數據，就直接放棄此次調用。
httpPost.setConfig(requestConfig);
CloseableHttpResponse response=null;
try {
httpPost.setEntity(new StringEntity(jsonParams.toString(), Charset.forName("UTF-8")));
response = httpclient.execute(httpPost);
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
/**請求發送成功，並得到響應**/
JSONObject jsonObject=null;
if(response != null){
if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity httpEntity = response.getEntity();
String result=null;
try {
result = EntityUtils.toString(httpEntity);
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 返回json格式：
jsonObject = JSONObject.fromObject(result);
}
}
return jsonObject;
}
/**
* 發送post請求
* @param url
* @param params
* @return
*/
public static JSONObject postData(String url,Map<String,String> params){
CloseableHttpClient httpclient = HttpClientUtil.createDefault();
HttpPost httpPost = new HttpPost(url);
//拼接參數
List<NameValuePair> list = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : params.entrySet()) {
String key = entry.getKey().toString();
String value = entry.getValue().toString();
NameValuePair pair = new BasicNameValuePair(key, value);
list.add(pair);
}
CloseableHttpResponse response=null;
try {
httpPost.setEntity(new UrlEncodedFormEntity(list,"UTF-8"));
response = httpclient.execute(httpPost);
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
/**請求發送成功，並得到響應**/
JSONObject jsonObject=null;
if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity httpEntity = response.getEntity();
String result=null;
try {
result = EntityUtils.toString(httpEntity);
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 返回json格式：
jsonObject = JSONObject.fromObject(result);
}
return jsonObject;
}
/**
* 向指定URL發送GET方法的請求
*
* @param url
* 發送請求的URL
* @param param
* 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
* @return URL 所代表遠程資源的響應結果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打開和URL之間的連接
URLConnection connection = realUrl.openConnection();
// 設置通用的請求屬性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立實際的連接
connection.connect();
// 獲取所有響應頭字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍歷所有的響應頭字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定義 BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("發送GET請求出現異常！" + e);
e.printStackTrace();
}
// 使用finally塊來關閉輸入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* get請求
* @param url
* @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
* @return
*/
public static JSONObject httpGet(String url, String param){
JSONObject jsonResult = null; //get請求返回結果
try {
CloseableHttpClient httpclient = HttpClientUtil.createDefault();
//發送get請求
HttpGet request = new HttpGet(url);
URI realUrl = new URI(url + "?" + param);
request.setURI(realUrl);
HttpResponse response = httpclient.execute(request);
/**請求發送成功，並得到響應**/
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
/**讀取服務器返回過來的json字符串數據**/
String strResult = EntityUtils.toString(response.getEntity());
/**把json字符串轉換成json對象**/
jsonResult = JSONObject.fromObject(strResult);
url = URLDecoder.decode(url, "UTF-8");
} else {
System.out.println("get請求提交失敗:" + url);
}
} catch (IOException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
return jsonResult;
}
/**
* Creates {@link CloseableHttpClient} instance with default
* configuration.
*/
public static CloseableHttpClient createDefault() {
return HttpClientBuilder.create().build();
}
}