httpclient工具类

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#httpclient工具类 #httpclient

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本文介绍了一个实用的HTTPClient工具类，包括GET和POST请求的实现，以及如何使用该工具类进行天气信息查询和短信接口调用。文章深入解析了Java中HTTP请求的处理方式，适合Java开发者学习。

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import java.net.URI;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Set;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

/**
*

类: HttpClient
描述: httpclient工具类
作者: song
时间: 2017年7月21日下午3:15:27
*/
public class HttpClientUtil {

static CloseableHttpClient client = null;
static {
client = HttpClients.createDefault();
}

/**
- 方法: get
- 描述: get请求
- 作者: Teacher song
- 时间: 2017年7月21日下午3:15:25
- @param url
- @param params
- @return
- @throws Exception
  */
  public static String get(String url,HashMap<String, Object> params){
  try {
  HttpGet httpGet = new HttpGet();
  Set keySet = params.keySet();
  StringBuffer stringBuffer = new StringBuffer();
  stringBuffer.append(url).append("?t=").append(System.currentTimeMillis());
  for (String key : keySet) {
  stringBuffer.append("&").append(key).append("=").append(params.get(key));
  }
  httpGet.setURI(new URI(stringBuffer.toString()));
  CloseableHttpResponse execute = client.execute(httpGet);
  int statusCode = execute.getStatusLine().getStatusCode();
  if (200 != statusCode) {
  return “”;
  }
  return EntityUtils.toString(execute.getEntity(), “utf-8”);
  }catch (Exception e) {
  e.printStackTrace();
  return null;
  }
  }
/**
- 方法: post
- 描述: post请求
- 作者: Teacher song
- 时间: 2017年7月21日下午3:20:31
- @param url
- @param params
- @return
- @throws Exception
  /
  public static String post(String url,HashMap<String, Object> params) {
  try {
  HttpPost httpPost = new HttpPost();
  httpPost.setURI(new URI(url));
  List parameters = new ArrayList();
  Set keySet = params.keySet();
  for (String key : keySet) {
  NameValuePair e = new BasicNameValuePair(key, params.get(key).toString());
  parameters.add(e);
  }
  HttpEntity entity = new UrlEncodedFormEntity(parameters , “utf-8”);
  httpPost.setEntity(entity);
  CloseableHttpResponse execute = client.execute(httpPost);
  int statusCode = execute.getStatusLine().getStatusCode();
  if (200 != statusCode) {
  return “”;
  }
  return EntityUtils.toString(execute.getEntity(), “utf-8”);
  }catch (Exception e) {
  e.printStackTrace();
  return null;
  }
  }
  //天气接口
  / public static void main(String[] args) {
  String url = “http://t.weather.sojson.com/api/weather/city/101030100”;
  HashMap<String, Object> params = new HashMap<>();
  String string = get(url, params );
  //System.out.println(string);
  JSONObject repdate = JSON.parseObject(string);
  JSONObject data = repdate.getJSONObject(“data”);
  JSONArray forecast = data.getJSONArray(“forecast”);
  JSONObject jsonObject = forecast.getJSONObject(0);
  String high = jsonObject.getString(“high”);
  System.out.println(high);
  }*/
  //发送短信接口
  /public static void main(String[] args) {
  String url = CommonCanstant.SEND_MSG_URL;
  HashMap<String, Object> params = new HashMap<>();
  params.put(“accountSid”, CommonCanstant.SEND_MSG_ACCOUNT_ID);//开发者主账号ID
  params.put(“to”,“这里输手机号”);//短信接收端手机号码集合
  String time = TimeUtil.format(new Date());
  params.put(“timestamp”,time);//时间戳
  String sigStr = CommonCanstant.SEND_MSG_ACCOUNT_ID+CommonCanstant.SEND_MSG_TOKEN+time;
  params.put(“sig”,Md5Util.getMd532(sigStr));//签名。MD5(ACCOUNT SID + AUTH TOKEN + timestamp)。共32位（小写）
  params.put(“templateid”, “1116707112”);//短信模板ID
  params.put(“param”, “123456”);//短信模板ID
  String post = post(url, params );
  System.out.println(post);
  }/
  //群发短信
  public static long code(String phone) {
  // String url = CommonCanstant.SEND_MSG_URL;
  // HashMap<String, Object> params = new HashMap<>();
  // params.put(“accountSid”, CommonCanstant.SEND_MSG_ACCOUNT_ID);//开发者主账号ID
  // params.put(“to”,phone);//短信接收端手机号码集合
  // String time = TimeUtil.format(new Date());
  // params.put(“timestamp”,time);//时间戳
  // String sigStr = CommonCanstant.SEND_MSG_ACCOUNT_ID+CommonCanstant.SEND_MSG_TOKEN+time;
  // params.put(“sig”,Md5Util.getMd532(sigStr));//签名。MD5(ACCOUNT SID + AUTH TOKEN + timestamp)。共32位（小写）
  // params.put(“templateid”, “1116707112”);//短信模板ID
  long str = Math.round(Math.random()*899999+100000);
  // params.put(“param”, str);//短信模板ID
  // String post = post(url, params );
  // System.out.println(post);
  return str;
  }
  //连接其他项目测试方法
  public static void main(String[] args) {
  String url=“http://localhost:8080/ssm-employee-wdd/book/queryBookType.do”;
  HashMap<String, Object> params = new HashMap<>();
  String string = get(url, params);
  JSONArray parseArray = JSONArray.parseArray(string);
  System.out.println(string);
  }
  }