• 调用别人接口的常用方法htticlient、resultTemple

    1.restTemplate方法

    	 //body体中存入请求信息
	 Map paramsMap = new HashMap(8);
    List stringlist=new ArrayList<>();
    paramsMap.put("consumerCats", stringlist);//存入空数据
    paramsMap.put("orderStatuss", myOrderListQuery.getOrderStatuss());
    String msg=JSON.toJSONString(paramsMap);

    //header请求头中存入信息
	HttpHeaders headerMap = new HttpHeaders();
    headerMap.add("token", myOrderListQuery.getUserId());
    headerMap.add("content-type","application/json");
    headerMap.add("content-charset","utf-8");
    //请求信息存入paramEntity 
    HttpEntity paramEntity = new HttpEntity<>(msg, headerMap);
    
    RestTemplate restTemplate =new RestTemplate();
ResponseEntity responseEntitys = restTemplate.exchange(url+"?userId="+query.getUserId(),
        HttpMethod.POST, paramEntity, JSONObject.class);
        //返回数据用JSONObject接收
	JSONObject resultJson = responseEntitys.getBody();

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    需要引入import org.springframework.web.client.RestTemplate;

    2.htticlient方法

    String url= employeeMsg+"?memberNo="+carNum ;
String result = HttpClientUtil.post(url, "", "utf-8", 80000);
 Map resultMap = JSON.parseObject(result, Map.class);

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    HttpClientUtil工具类代码如下：
    package com.csair.mpms.utils;

    import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;
import com.csair.mpms.tool.MD5Utils;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.SimpleHttpConnectionManager;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;


public class HttpClientUtil
{
	private static final Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);

	private static int TIME_OUT_MILLISECOND = 10000;

	/**
	 * 设置请求和传输超时时间
	 */
	private static RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(TIME_OUT_MILLISECOND).setConnectTimeout(TIME_OUT_MILLISECOND).build();

	public static void main(String[] args) throws Exception {
		String reqURL = "http://10.108.25.229:8080/xxl-job-admin/jobinfo/add";
		List sendData  = new ArrayList();
//
//		jobGroup: 1
//		jobDesc: 远程接口测试任务
//		executorRouteStrategy: FIRST
//		jobCron: * */5 * * * ?

//		glueType: BEAN
//		executorHandler: demoJobHandler
//		executorBlockStrategy: SERIAL_EXECUTION

//		childJobId: 3
//		executorTimeout: 30
//		executorFailRetryCount: 1

//		author: 李四
//		alarmEmail: test@csair.com
//		executorParam: 测试参数

//		glueRemark: GLUE代码初始化
//		glueSource:


		//这个要可配置
		sendData.add(new NameValuePair("jobGroup","1"));

		//分群名
		sendData.add(new NameValuePair("jobDesc","远程接口测试任务"));

		//这个要可配置
		sendData.add(new NameValuePair("executorRouteStrategy","FIRST"));

		//分群的计划
		sendData.add(new NameValuePair("jobCron","* */5 * * * ?"));

		sendData.add(new NameValuePair("glueType","BEAN"));

		//这个要可配置
		sendData.add(new NameValuePair("executorHandler","demoJobHandler"));
		sendData.add(new NameValuePair("executorBlockStrategy","DISCARD_LATER"));

		//sendData.add(new NameValuePair("childJobId","3"));
		sendData.add(new NameValuePair("executorTimeout","1800"));
		//sendData.add(new NameValuePair("executorFailRetryCount","1"));


		//当前用户名
		sendData.add(new NameValuePair("author","李四11"));
		//目前放空
		sendData.add(new NameValuePair("alarmEmail","test@csair.com"));
		//参数传分群ID
		sendData.add(new NameValuePair("executorParam","测试参数"));
		//分群 名字或备注
		sendData.add(new NameValuePair("glueRemark","GLUE代码初始化"));
		sendData.add(new NameValuePair("glueSource",""));

		post(reqURL, sendData, "UTF-8", TIME_OUT_MILLISECOND);

	}


	/**
	 * 发送 Post请求
	 * @param url
	 * @param params
	 * @param decodeCharset
	 * @return
	 */
	public static String post(String url, List params, String decodeCharset) {
	      return post(url, params, decodeCharset , TIME_OUT_MILLISECOND);
	}

	public static String post(String url, List params, String decodeCharset , int timeout, List
     headers) {
		HttpClient httpClient = new HttpClient(); // 创建默认的httpClient实例
		PostMethod postMethod = new PostMethod(url);
		//   填入各个表单域的值
		NameValuePair[] data = (NameValuePair[]) params.toArray(new NameValuePair[params.size()]);
		httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
		httpClient.getParams().setContentCharset(decodeCharset);

		//   将表单的值放入postMethod中
		postMethod.setRequestBody(data);

		if (null != headers){
			for (Header header:headers){
				postMethod.setRequestHeader(header);
			}
		}
		//   执行postMethod
		int statusCode = 0;
		String responseContent = "";
		try {
			statusCode = httpClient.executeMethod(postMethod);
			if (statusCode == 200) {
				responseContent = postMethod.getResponseBodyAsString();
			} else {
				responseContent = String.valueOf(statusCode);
			}
		} catch (Exception e) {
			logger.error("HttpClient-post请求异常", e);
		}
		return responseContent;
	}

	/**
	 * 发送 Post请求
	 * @param url
	 * @param params
	 * @param decodeCharset
	 * @param timeout
	 * @return
	 */
    public static String post(String url, List params, String decodeCharset , int timeout) {
    	  HttpClient httpClient = new HttpClient(); // 创建默认的httpClient实例
    	  PostMethod postMethod = new PostMethod(url);
    	//   填入各个表单域的值
    	  NameValuePair[] data = (NameValuePair[]) params.toArray(new NameValuePair[params.size()]);
    	  httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
    	  httpClient.getParams().setContentCharset(decodeCharset);

    	//   将表单的值放入postMethod中
    	  postMethod.setRequestBody(data);
    	//   执行postMethod
    	  int statusCode = 0;
    	  String responseContent = "";
    	  try {
    	   statusCode = httpClient.executeMethod(postMethod);
    	   if (statusCode == 200) {
    		   responseContent = postMethod.getResponseBodyAsString();
	        	}
    	  } catch (HttpException e) {
    	   // TODO Auto-generated catch block
    	   e.printStackTrace();
    	   logger.error(e.getMessage());
    	  } catch (IOException e) {
    	   // TODO Auto-generated catch block
    	   e.printStackTrace();
    	   logger.error(e.getMessage());
    	  }
    	  return responseContent;
    }

	public static String post(String url, String params, String decodeCharset , int timeout) {
		HttpClient httpClient = new HttpClient(); // 创建默认的httpClient实例
		PostMethod postMethod = new PostMethod(url);
		//   填入各个表单域的值
		httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
		httpClient.getParams().setContentCharset(decodeCharset);
		//   将表单的值放入postMethod中
		postMethod.setRequestBody(params);
		Header header=new Header("content-type","application/json");
		postMethod.setRequestHeader(header);
		int statusCode = 0;
		String responseContent = "";
		try {
			statusCode = httpClient.executeMethod(postMethod);
			if (statusCode == 200) {
				responseContent = postMethod.getResponseBodyAsString();
			}
		} catch (Exception e) {
			logger.info("调用接口失败 --{}--",e);
		}
		return responseContent;
	}

	public static String get(String url)
			throws Exception {
		GetMethod m = new GetMethod(url);
		StringBuilder rsp = new StringBuilder();
		HttpClient httpClient = null;
		try {
			m.setRequestHeader("Connection", "close");
			httpClient = new HttpClient();
			httpClient.getHttpConnectionManager().getParams()
					.setConnectionTimeout(10000);
			httpClient.getHttpConnectionManager().getParams()
					.setSoTimeout(10000);
			if (httpClient.executeMethod(m) == HttpStatus.SC_OK) {
				BufferedReader br = new BufferedReader(new InputStreamReader(
						m.getResponseBodyAsStream(), "utf-8"));
				boolean first = true;
				String line;
				try {
					while ((line = br.readLine()) != null) {
						if (first) {
							first = false;
						} else {
							rsp.append('\n');
						}
						rsp.append(line);
					}
				} catch (Exception e) {
					throw e;
				} finally {
					try {
						br.close();
					} catch (Exception e) {
					}
				}
				return rsp.toString();
			} else {
				return null;
			}
		} catch (Exception e) {
			throw e;
		} finally {
			try {
				m.releaseConnection();
				SimpleHttpConnectionManager simpleHttpConnectionManager = (SimpleHttpConnectionManager) httpClient
						.getHttpConnectionManager();
				if (simpleHttpConnectionManager != null) {
					simpleHttpConnectionManager.shutdown();
				}
			} catch (Exception e) {
			}
		}
	}

	/**
	 *
	 * @param url
	 * @param params
	 * @param decodeCharset
	 * @param timeout
	 * @param header1
	 * @param header2
	 * @param header3
	 * @return
	 */
	public static String cbdCabinPost(String url, String params, String decodeCharset , int timeout,String header1,String header2,String header3) {
		HttpClient httpClient = new HttpClient(); // 创建默认的httpClient实例
		PostMethod postMethod = new PostMethod(url);
		//   填入各个表单域的值
		httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
		httpClient.getParams().setContentCharset(decodeCharset);
		//   将表单的值放入postMethod中
		postMethod.setRequestBody(params);

		String encrypt = MD5Utils.encrypt(header1 + header2 + header3);
		Header header=new Header("content-type","application/json");
		Header headerOne = new Header("username",header1);
		Header headerTwo = new Header("encryptPwd",encrypt);
		Header headerThree = new Header("timestamp",header3);

		postMethod.setRequestHeader(header);
		postMethod.setRequestHeader(headerOne);
		postMethod.setRequestHeader(headerTwo);
		postMethod.setRequestHeader(headerThree);


		int statusCode = 0;
		String responseContent = "";
		try {
			statusCode = httpClient.executeMethod(postMethod);
			if (statusCode == 200) {
				responseContent = postMethod.getResponseBodyAsString();
			}
		} catch (HttpException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			logger.error(e.getMessage());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			logger.error(e.getMessage());
		}
		return responseContent;
	}


	public static String cbdCabinGet(String url,String header1,String header2,String header3)
			throws Exception {
		GetMethod m = new GetMethod(url);
		StringBuilder rsp = new StringBuilder();
		HttpClient httpClient = null;
		String encrypt = MD5Utils.encrypt(header1 + header2 + header3);
		try {
			m.setRequestHeader("Connection", "close");
			m.setRequestHeader("username",header1);
			m.setRequestHeader("encryptPwd",encrypt);
			m.setRequestHeader("timestamp",header3);
			httpClient = new HttpClient();
			httpClient.getHttpConnectionManager().getParams()
					.setConnectionTimeout(10000);
			httpClient.getHttpConnectionManager().getParams()
					.setSoTimeout(10000);
			if (httpClient.executeMethod(m) == HttpStatus.SC_OK) {
				BufferedReader br = new BufferedReader(new InputStreamReader(
						m.getResponseBodyAsStream(), "utf-8"));
				boolean first = true;
				String line;
				try {
					while ((line = br.readLine()) != null) {
						if (first) {
							first = false;
						} else {
							rsp.append('\n');
						}
						rsp.append(line);
					}
				} catch (Exception e) {
					throw e;
				} finally {
					try {
						br.close();
					} catch (Exception e) {
					}
				}
				return rsp.toString();
			} else {
				return null;
			}
		} catch (Exception e) {
			throw e;
		} finally {
			try {
				m.releaseConnection();
				SimpleHttpConnectionManager simpleHttpConnectionManager = (SimpleHttpConnectionManager) httpClient
						.getHttpConnectionManager();
				if (simpleHttpConnectionManager != null) {
					simpleHttpConnectionManager.shutdown();
				}
			} catch (Exception e) {
			}
		}
	}

	public static String post(String url, String params, String decodeCharset , int timeout,List
     headerList) {
		HttpClient httpClient = new HttpClient(); // 创建默认的httpClient实例
		PostMethod postMethod = new PostMethod(url);
		//   填入各个表单域的值
		httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
		httpClient.getParams().setContentCharset(decodeCharset);
		//   将表单的值放入postMethod中
		postMethod.setRequestBody(params);
		if(headerList!=null && headerList.size() > 0){
			for (Header header : headerList) {
				postMethod.setRequestHeader(header);
			}
		}
		int statusCode = 0;
		String responseContent = "";
		try {
			statusCode = httpClient.executeMethod(postMethod);
			if (statusCode == 200) {
				responseContent = postMethod.getResponseBodyAsString();
			}
		} catch (HttpException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			logger.error(e.getMessage());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			logger.error(e.getMessage());
		}
		return responseContent;
	}

	public static String doGet(String url , int timeout, List
     headers)
			throws Exception {
		GetMethod m = new GetMethod(url);
		StringBuilder rsp = new StringBuilder();
		HttpClient httpClient = null;
		try {
			if (headers!=null && !headers.isEmpty()){
				for (Header header: headers){
					m.setRequestHeader(header);
				}
			}
			httpClient = new HttpClient();
			httpClient.getHttpConnectionManager().getParams()
					.setConnectionTimeout(timeout);
			httpClient.getHttpConnectionManager().getParams()
					.setSoTimeout(timeout);
			if (httpClient.executeMethod(m) == HttpStatus.SC_OK) {
				BufferedReader br = new BufferedReader(new InputStreamReader(
						m.getResponseBodyAsStream(), "utf-8"));
				boolean first = true;
				String line;
				try {
					while ((line = br.readLine()) != null) {
						if (first) {
							first = false;
						} else {
							rsp.append('\n');
						}
						rsp.append(line);
					}
				} catch (Exception e) {
					throw e;
				} finally {
					try {
						br.close();
					} catch (Exception e) {
					}
				}
				return rsp.toString();
			} else {
				return null;
			}
		} catch (Exception e) {
			throw e;
		} finally {
			try {
				m.releaseConnection();
				SimpleHttpConnectionManager simpleHttpConnectionManager = (SimpleHttpConnectionManager) httpClient
						.getHttpConnectionManager();
				if (simpleHttpConnectionManager != null) {
					simpleHttpConnectionManager.shutdown();
				}
			} catch (Exception e) {
			}
		}
	}

	/**
	 * 构建ssl请求
	 * @param httpUrl
	 * @param params
	 * @param headers
	 * @return
	 */
	public static String postSSL(String httpUrl, Map params, Map headers) {
		String result = null ;
		CloseableHttpClient httpclient = createSSLClientDefault();
		ResponseHandler responseHandler = new BasicResponseHandler();
		HttpPost httpPost = new HttpPost(httpUrl);
		httpPost.setConfig(requestConfig);
		httpPost.setHeader("Connection", "close");
		httpPost.setHeader("Content-Type","application/json");
		if (headers!=null && headers.size()>0){
			for (Map.Entry entry : headers.entrySet()) {
				String key = entry.getKey();
				String value = entry.getValue();
				httpPost.setHeader(key, value);
			}
		}
		//将参数转成json字符串并设置json的编码UTF-8
		StringEntity se = new StringEntity(JSONObject.toJSONString(params), ContentType.APPLICATION_JSON);
		se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
		httpPost.setEntity(se);
		String response = null;
		try {
			response = httpclient.execute(httpPost, responseHandler);
			JSONObject ret = JSONObject.parseObject(response);
			result = ret.toJSONString();
		} catch (IOException e) {
			logger.error("postSSL异常", e);
		} finally {
			try {
				httpclient.close();
			} catch (IOException e) {
				logger.error("httpclient.close() Exception", e);
			}
		}
		return result;
	}

	public static CloseableHttpClient createSSLClientDefault(){

		try {
			//SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
			// 在JSSE中，证书信任管理器类就是实现了接口X509TrustManager的类。我们可以自己实现该接口，让它信任我们指定的证书。
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			//信任所有
			X509TrustManager x509mgr = new X509TrustManager() {

				//　　该方法检查客户端的证书，若不信任该证书则抛出异常
				@Override
				public void checkClientTrusted(X509Certificate[] xcs, String string) {
				}
				// 　　该方法检查服务端的证书，若不信任该证书则抛出异常
				@Override
				public void checkServerTrusted(X509Certificate[] xcs, String string) {
				}
				// 　返回受信任的X509证书数组。
				@Override
				public X509Certificate[] getAcceptedIssuers() {
					return null;
				}
			};
			SSLContext sslContext = SSLContext.getInstance("TLS");
			sslContext.init(null, new TrustManager[] { x509mgr }, null);
			创建HttpsURLConnection对象，并设置其SSLSocketFactory对象
			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

			//  HttpsURLConnection对象就可以正常连接HTTPS了，无论其证书是否经权威机构的验证，只要实现了接口X509TrustManager的类 MyX509TrustManager 信任该证书。
			return HttpClients.custom().setSSLSocketFactory(sslsf).build();


		} catch (KeyManagementException e) {

			e.printStackTrace();

		} catch (NoSuchAlgorithmException e) {

			e.printStackTrace();

		} catch (Exception e) {

			e.printStackTrace();

		}

		// 创建默认的httpClient实例.
		return  HttpClients.createDefault();

	}
}

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  • 原文地址：https://blog.csdn.net/qq_26169011/article/details/126007971