HTTPClients的客户端执行请求,并获取响应，响应中解析具体的报文内容，最后返回请求内容将其转换成字符串

package com.fast.sky.util;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSONObject;
import com.fast.sky.domain.UserEntity;

/**

• JDK version:1.8
  

• extends：
  

• implements：
  
  *--------------------------------------------------------------
  

• V1.0 创建 杨光 2019年6月7日
  *--------------------------------------------------------------
  
  */
  public class HttpRequestUtil {

  private static final Logger logger = LoggerFactory.getLogger(HttpRequestUtil.class);
  private static CloseableHttpResponse response = null;
  private static HttpEntity httpEntity = null;
  private static StringEntity entity = null;

  /**

  执行HTTP GET类型请求

• @param requestURL/请求地址

• @return 响应字符串
  */
  public synchronized static String httpGet(String requestURL)
  {
  try
  {

  if(null==requestURL || !requestURL.startsWith("http"))
  {
  logger.debug("The url is not exist ! Please check your Http request url .");
  }
  //1.创建请求类型：GET
  HttpGet get = new HttpGet(requestURL);
  //为请求类型的头部添加信息
  get.addHeader("Content-Type", "application/json;charset=utf-8");
  //2.利用HTTPClients的客户端执行请求,并获取响应
  response = HttpClients.custom().build().execute(get);
  int code = response.getStatusLine().getStatusCode();//获取执行之后的状态码，200执行正常
  if(200 != code)
  {
  throw new RuntimeException("HTTP GET Request Failed with Error code : " + code);
  }
  //3.从响应中解析具体的报文内容
  httpEntity = response.getEntity();
  //4.最后返回请求内容将其转换成字符串
  return EntityUtils.toString(httpEntity , "UTF-8");

  }
  catch (Exception e)
  {
  return “请求异常”;
  }
  }

/**

• 执行HTTP POST类型请求

• @param requestURL/请求地址

• @param data/附带参数

• @return 响应字符串
  */
  public synchronized static String httpPostRequest(String requestURL , String data)
  {
  try
  {
  if(null==requestURL || !requestURL.startsWith(“http”))
  {
  logger.error(“The url is not exist ! Please check your Http request url.”);
  }

  HttpPost post = new HttpPost(requestURL.trim());
  post.setHeader("Content-Type", "application/json;charset=utf-8");
  entity = new StringEntity(data , ContentType.APPLICATION_JSON );
  post.setEntity(entity);
  
  response = HttpClients.custom().build().execute(post);
  int code = response.getStatusLine().getStatusCode();
  if(200 != code) {
  throw new RuntimeException("HTTP POST Request Failed with Error code : " + code);
  }
  httpEntity = response.getEntity();
  return EntityUtils.toString(httpEntity , "UTF-8");

  }
  catch (Exception e)
  {
  return “请求异常”;
  }
  }

/**

• 执行HTTP DELETE类型请求

• @param requestURL/请求地址

• @return 响应字符串
  */
  public synchronized static String httpDeleteRequest(String requestURL)
  {
  try
  {
  if(null == requestURL || !requestURL.startsWith(“http”))
  {
  logger.debug(“The url is not exist ! Please check your Http request url.”);
  }

  HttpDelete delete  = new HttpDelete(requestURL.trim());
  delete.addHeader("Content-Type", "application/json;charset=utf-8");
  
  response = HttpClients.custom().build().execute(delete);
  int code = response.getStatusLine().getStatusCode();
  if(200 != code)
  {
  throw new RuntimeException("HTTP DELETE Request Failed with Error code : " + code);
  }
  httpEntity = response.getEntity();
  return EntityUtils.toString(httpEntity , "UTF-8");

  }
  catch (Exception e)
  {
  return “请求异常”;
  }
  }

/**

• 执行HTTP PUT类型请求

• @param requestURL/请求地址

• @param data/附带参数

• @return 响应字符串
  */
  public synchronized static String httpPutRequest(String requestURL, String data)
  {
  try
  {
  if(null==requestURL || !requestURL.startsWith(“http”))
  {
  logger.debug(“The url is not exist ! Please check your Http request url.”);
  }

  HttpPut put = new HttpPut(requestURL.trim());
  put.setHeader("Content-Type", "application/json;charset=utf-8");
  entity = new StringEntity(data , ContentType.APPLICATION_JSON );
  put.setEntity(entity);
  
  response = HttpClients.custom().build().execute(put);
  int code = response.getStatusLine().getStatusCode();
  if(200 != code)
  {
  throw new RuntimeException("HTTP PUT Request Failed with Error code : " + code);
  }
  httpEntity = response.getEntity();
  return EntityUtils.toString(httpEntity , "UTF-8");

  }
  catch (Exception e)
  {
  return “请求异常”;
  }
  }

}