在Java中发送http的post请求,设置请求参数等等

前几天做了一个定时导入数据的接口,需要发送http请求,第一次做这种的需求,特地记一下子,

导包

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.SortedMap;
import java.util.TreeMap;

import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

 CloseableHttpResponse response;// 响应类,
 CloseableHttpClient httpClient = HttpClients.createDefault();
 HttpPost httpPost = new HttpPost(JTR_QUERY_ORDER); //请求url

 // 转json参数
 String paramJson = JSONObject.fromObject(sortedMap).toString();
 StringEntity stringEntity = new StringEntity(paramJson,ContentType.create("text/json", "UTF-8"));
 httpPost.setEntity(stringEntity);

 response = httpClient.execute(httpPost);

 //这种是发送json请求参数的,发送form形式参数的可以通过

 SortedMap<String, String> sortedMap = packetRequestParameters(cash, orderNum, authCode, payType, mchId);

 List<NameValuePair> params = new ArrayList<NameValuePair>(sortedMap.size());
 if (!sortedMap.isEmpty()) {
 　　for (Map.Entry<String, String> parameter : sortedMap.entrySet()) {
 　　　　params.add(new BasicNameValuePair(parameter.getKey(), parameter
 　　　　.getValue()));
 　　}
 }
 httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

 //设置请求头信息可以通过

 Map<String, String> headerMap = new HashMap<>();
 headerMap.put("X-QF-SIGN", sortedMap.get("sign"));
 headerMap.put("X-QF-APPCODE", APP_CODE);//分配给开发者的app_code，开发者的唯一标示

 if (!headerMap.isEmpty()) {
 　　for (Map.Entry<String, String> vo : headerMap.entrySet()) {
 　　　　httpPost.setHeader(vo.getKey(), vo.getValue());
 　　}
 }

 if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
 // 3 请求成功，处理请求结果
 if (response != null && response.getEntity() != null) {
 　　String string = EntityUtils.toString(response.getEntity(),"utf-8");
 　　//    String unescapeJava = StringEscapeUtils.unescapeJava(string);//java反转义,示例中不需要所以注释了
 　　JSONObject resultObject = JSONObject.fromObject(string);
// 如果是数组类型的话使用 JSONArray resultObject = JSONArray.fromObject(fromBase64); 
 　　// log.info("定时导入---->返回数据3: " + resultObject.toString());  　　// 插入数据  　　flag = insertJtrOrder(resultObject);  }else{  　　flag = false;  　　log.error("订单定时导入---->系统出错");  }  }else{  　　flag = false;  　　log.error("订单定时导入---->请求失败");  }

CloseableHttpResponse response;// 响应类,

CloseableHttpClient httpClient = HttpClients.createDefault();

HttpPost httpPost = new HttpPost(JTR_QUERY_ORDER); //请求url

// 转json参数

String paramJson = JSONObject.fromObject(sortedMap).toString();

StringEntity stringEntity = new StringEntity(paramJson,ContentType.create("text/json", "UTF-8"));

httpPost.setEntity(stringEntity);

response = httpClient.execute(httpPost);

这种是发送json请求参数的,发送form形式的可以通过

SortedMap<String, String> sortedMap = packetRequestParameters(cash, orderNum, authCode, payType, mchId);

List<NameValuePair> params = new ArrayList<NameValuePair>(sortedMap.size());
if (!sortedMap.isEmpty()) {
for (Map.Entry<String, String> parameter : sortedMap.entrySet()) {
params.add(new BasicNameValuePair(parameter.getKey(), parameter
.getValue()));
}
}
httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

设置请求头信息可以通过

Map<String, String> headerMap = new HashMap<>();
headerMap.put("X-QF-SIGN", sortedMap.get("sign"));
headerMap.put("X-QF-APPCODE", APP_CODE);//分配给开发者的app_code，开发者的唯一标示

if (!headerMap.isEmpty()) {
for (Map.Entry<String, String> vo : headerMap.entrySet()) {
httpPost.setHeader(vo.getKey(), vo.getValue());
}
}

if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
// 3 请求成功，处理请求结果
if (response != null && response.getEntity() != null) {
String string = EntityUtils.toString(response.getEntity(),"utf-8");
// String unescapeJava = StringEscapeUtils.unescapeJava(string);//java反转义,示例中不需要所以注释了
JSONObject resultObject = JSONObject.fromObject(string);
// log.info("JTR订单定时导入---->返回数据3: " + resultObject.toString());
// 插入数据
flag = insertJtrOrder(resultObject);
}else{
flag = false;
log.error("JTR订单定时导入---->系统出错");
}
}else{
flag = false;
log.error("JTR订单定时导入---->请求失败");
}

大概就是这样,以后有别的东西再补充把