httpclient模拟post请求json封装表单数据

package com.chinecredit.eccis.utils;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.List;import java.util.Map;import java.util.Set;import org.apache.http.HttpEntity;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.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.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.alibaba.fastjson.JSONObject;/** * http访问方法实现 * @author 王俊南 ?* @date: 2018-11-22 */public class HttpRequestUtils { ???private static Logger logger = LoggerFactory ???????????.getLogger(HttpRequestUtils.class); // 日志记录 ???/** ????* GET提交 ????* ?????* @return ????*/ ???public static String doGet(String url) { ???????String strResult = ""; ???????// 1. 创建一个默认的client实例 ???????CloseableHttpClient client = HttpClients.createDefault(); ???????try { ???????????// 2. 创建一个httpget对象 ???????????HttpGet httpGet = new HttpGet(url); ???????????System.out.println("executing GET request " + httpGet.getURI()); ???????????// 3. 执行GET请求并获取响应对象 ???????????CloseableHttpResponse resp = client.execute(httpGet); ???????????try { ???????????????// 6. 打印响应长度和响应内容 ???????????????if (resp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { ???????????????????// 4. 获取响应体 ???????????????????HttpEntity entity = resp.getEntity(); ???????????????????System.out.println("Response content length = " ???????????????????????????+ entity.getContentLength()); ???????????????????System.out.println("------"); ???????????????????strResult = EntityUtils.toString(resp.getEntity()); ???????????????} ???????????} finally { ???????????????//无论请求成功与否都要关闭resp ???????????????resp.close(); ???????????} ???????} catch (ClientProtocolException e) { ???????????logger.error("get请求失败:", e); ???????????// e.printStackTrace(); ???????} catch (ParseException e) { ???????????logger.error("get请求解析出错:", e); ???????????// e.printStackTrace(); ???????} catch (IOException e) { ???????????logger.error("get请求IO出错:", e); ???????????// e.printStackTrace(); ???????} finally { ???????????// 8. 最终要关闭连接，释放资源 ???????????try { ???????????????client.close(); ???????????} catch (Exception e) { ???????????????logger.error("get请求完毕关闭连接出错:", e); ???????????????// e.printStackTrace(); ???????????} ???????} ???????return strResult; ???} ???/** ????* 普通POST提交 ????* @param url ????* @param map ????* @return ????*/ ???public static String doPost(String url, Map<String, Object> map) { ???????String strResult = ""; ???????// 1. 获取默认的client实例 ???????CloseableHttpClient client = HttpClients.createDefault(); ???????// 2. 创建httppost实例 ???????HttpPost httpPost = new HttpPost(url); ???????// 3. 创建参数队列（键值对列表） ???????List<NameValuePair> paramPairs = new ArrayList<>(); ???????Set<String> keySet = map.keySet(); ???????for (String key : keySet) { ???????????Object val = map.get(key); ???????????paramPairs.add(new BasicNameValuePair(key, val.toString())); ???????} ???????UrlEncodedFormEntity entity; ???????try { ???????????// 4. 将参数设置到entity对象中 ???????????entity = new UrlEncodedFormEntity(paramPairs, "UTF-8"); ???????????// 5. 将entity对象设置到httppost对象中 ???????????httpPost.setEntity(entity); ???????????// 6. 发送请求并回去响应 ???????????CloseableHttpResponse resp = client.execute(httpPost); ???????????try { ???????????????// 7. 获取响应entity ???????????????HttpEntity respEntity = resp.getEntity(); ???????????????strResult = EntityUtils.toString(respEntity, "UTF-8"); ???????????} finally { ???????????????// 9. 关闭响应对象 ???????????????resp.close(); ???????????} ???????} catch (ClientProtocolException e) { ???????????e.printStackTrace(); ???????} catch (UnsupportedEncodingException e) { ???????????e.printStackTrace(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} finally { ???????????// 10. 关闭连接，释放资源 ???????????try { ???????????????client.close(); ???????????} catch (Exception e) { ???????????????e.printStackTrace(); ???????????} ???????} ???????return strResult; ???} ???????/** ????* json参数方式POST提交 ????* @param url ????* @param params ????* @return ????*/ ???public static String doPost(String url, JSONObject params){ ???????String strResult = ""; ???????// 1. 获取默认的client实例 ???????CloseableHttpClient client = HttpClients.createDefault(); ???????// 2. 创建httppost实例 ???????HttpPost httpPost = new HttpPost(url); ???????httpPost.addHeader("Content-Type", "application/json;charset=utf-8"); //添加请求头 ???????try { ???????????httpPost.setEntity(new StringEntity(params.toJSONString(),"utf-8")); ???????????CloseableHttpResponse resp = client.execute(httpPost); ???????????try { ???????????????// 7. 获取响应entity ???????????????HttpEntity respEntity = resp.getEntity(); ???????????????strResult = EntityUtils.toString(respEntity, "UTF-8"); ???????????} finally { ???????????????resp.close(); ???????????} ???????} catch (ClientProtocolException e) { ???????????e.printStackTrace(); ???????} catch (UnsupportedEncodingException e) { ???????????e.printStackTrace(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} finally { ???????????try { ???????????????client.close(); ???????????} catch (Exception e) { ???????????????e.printStackTrace(); ???????????} ???????} ???????return strResult; ???}}