java发送post请求以raw形式和 Params形式发送

在对接第三方平台时遇到了好几个坑，，发送raw形式的请求时一直返回参数不存在搞得我欲不痛生，，，， 之后用postman测试了一下，发现用postman的raw形式的请求不行 换成postman的Params形式的请求就可以 所以提供了两种发送给大家参考

import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; 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.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.message.BasicHeader; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import java.io.*; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import java.util.*; import java.util.Map.Entry; /** * header 在传输header时请务必加上charset=utf-8; * "Content-Type: application/x-www-form-urlencoded;charset=utf-8\n" */ public static final String HEADER = "Accept-Encoding: gzip,deflate\n" + "Content-Type: application/x-www-form-urlencoded;charset=utf-8\n" + "Connection: Keep-Alive";

raw形式发送post请求

/** * @param url 访问地址 * @param param 需要传输参数参数；对象可以通过json转换成String * @param header header 参数；可以通过下面工具类将string类型转换成map * @return 返回网页返回的数据 */ public static String sendPost(String url, String param, Map<String, String> header) throws UnsupportedEncodingException, IOException { OutputStreamWriter out; BufferedReader in = null; String result = ""; URL realUrl = new URL(url); // 打开和URL之间的连接 HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection(); //设置超时时间 conn.setConnectTimeout(5000); conn.setReadTimeout(15000); // 设置通用的请求属性 if (header!=null) { for (Entry<String, String> entry : header.entrySet()) { conn.setRequestProperty(entry.getKey(), entry.getValue()); } } conn.setRequestMethod("POST"); conn.addRequestProperty("Content-Type", "application/json"); conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new OutputStreamWriter( conn.getOutputStream(),"UTF-8");// utf-8编码 // 发送请求参数 out.write(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf8")); String line; while ((line = in.readLine()) != null) { result += line; } if(out!=null){ out.close(); } if(in!=null){ in.close(); } return result; }

Params形式发送post请求

/** * @param url 访问地址 * @param headerMap header 参数；可以通过下面工具类将string类型转换成map * @param contentMap 需要传输参数参数；对象可以通过json转换成map * @return 返回网页返回的数据 */ public static String postMap(String url, Map<String, String> headerMap, Map<String, String> contentMap) { String result = null; CloseableHttpClient httpClient = HttpClients.createDefault(); HttpPost post = new HttpPost(url); List<NameValuePair> content = new ArrayList<NameValuePair>(); //将content生成entity Iterator iterator = contentMap.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, String> elem = (Entry<String, String>) iterator.next(); content.add(new BasicNameValuePair(elem.getKey(), elem.getValue())); } CloseableHttpResponse response = null; try { //循环增加header Iterator headerIterator = headerMap.entrySet().iterator(); while (headerIterator.hasNext()) { Entry<String, String> elem = (Entry<String, String>) headerIterator.next(); post.addHeader(elem.getKey(), elem.getValue()); } if (content.size() > 0) { UrlEncodedFormEntity entity = new UrlEncodedFormEntity(content, "UTF-8"); post.setEntity(entity); } //发送请求并接收返回数据 response = httpClient.execute(post); if (response != null && response.getStatusLine().getStatusCode() == 200) { //获取response的body部分 HttpEntity entity = response.getEntity(); //读取reponse的body部分并转化成字符串 result = EntityUtils.toString(entity); } return result; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { httpClient.close(); if (response != null) { response.close(); } } catch (IOException e) { e.printStackTrace(); } } return null; }

Header字符串转map

/** *Header字符串转map * @param zz * @return */ public static Map<String, String> splid(String zz) { String[] stepOne = zz.split("\n"); Map<String, String> map = new HashMap<String, String>(); for (int i = 0; i < stepOne.length; i++) { String[] stepTwo = stepOne[i].split(": "); if (map.get(stepTwo[0]) == null) { map.put(stepTwo[0], stepTwo[1]); } else { map.put(stepTwo[0], stepTwo[1] + "," + map.get(stepTwo[0])); } } return map; }