POST请求从postman工作,但不从java代码工作

POST请求从postman工作,但不从java代码工作,java,post,Java,Post,我在java中使用HttpUrlConnection发出post请求,我在postman上得到响应,但在java代码中调用时没有得到响应 下面是我的代码: public static JSONObject sendPostRequest(String requestURL, Map<String, String> params,Map<String,String>headers) throws IOException { S

我在java中使用HttpUrlConnection发出post请求,我在postman上得到响应,但在java代码中调用时没有得到响应

下面是我的代码:

public static JSONObject sendPostRequest(String requestURL,
            Map<String, String> params,Map<String,String>headers) throws IOException {
            StringBuffer response = new StringBuffer();

            URL url = new URL(requestURL);
            HttpURLConnection   httpConn = (HttpURLConnection) url.openConnection();
            httpConn.setRequestMethod("POST");
            httpConn.setRequestProperty( "Content-type", "application/x-www-form-urlencoded");


            StringBuffer requestParams = new StringBuffer();

            if (params != null && params.size() > 0) {



                for (Map.Entry<String,String> entry : headers.entrySet()) 
                    httpConn.setRequestProperty(entry.getKey(), entry.getValue());

                httpConn.setDoOutput(true);
                // creates the params string, encode them using URLEncoder
                Iterator<String> paramIterator = params.keySet().iterator();
                while (paramIterator.hasNext()) {
                    String key = paramIterator.next();
                    String value = params.get(key);
                    requestParams.append(URLEncoder.encode(key, "UTF-8"));
                    requestParams.append("=").append(
                            URLEncoder.encode(value, "UTF-8"));
                    requestParams.append("&");
                }

                // sends POST data
                OutputStreamWriter writer = new OutputStreamWriter(
                        httpConn.getOutputStream());
                writer.write(requestParams.toString());
                writer.flush();

                int responseCode = httpConn.getResponseCode();

                BufferedReader in = new BufferedReader(
                        new InputStreamReader(httpConn.getInputStream()));
                String inputLine;


                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();

                //print result
                System.out.println(response.toString());

            }
公共静态JSONObject sendPostRequest(字符串requestURL,
映射参数,映射头)引发IOException{
StringBuffer响应=新的StringBuffer();
URL=新URL(请求URL);
HttpURLConnection httpConn=(HttpURLConnection)url.openConnection();
httpConn.setRequestMethod(“POST”);
httpConn.setRequestProperty(“内容类型”、“应用程序/x-www-form-urlencoded”);
StringBuffer requestParams=新的StringBuffer();
if(params!=null&¶ms.size()>0){
for(Map.Entry:headers.entrySet())
httpConn.setRequestProperty(entry.getKey(),entry.getValue());
httpConn.setDoOutput(真);
//创建参数字符串,使用URLEncoder对其进行编码
迭代器paramIterator=params.keySet().Iterator();
while(parameterator.hasNext()){
String key=paramIterator.next();
字符串值=params.get(键);
append(URLEncoder.encode(键,“UTF-8”);
requestParams.append(“=”).append(
编码(值,“UTF-8”);
requestParams.append(“&”);
}
//发送POST数据
OutputStreamWriter writer=新的OutputStreamWriter(
httpConn.getOutputStream());
writer.write(requestParams.toString());
writer.flush();
int responseCode=httpConn.getResponseCode();
BufferedReader in=新的BufferedReader(
新的InputStreamReader(httpConn.getInputStream());
字符串输入线;
而((inputLine=in.readLine())!=null){
追加(inputLine);
}
in.close();
//打印结果
System.out.println(response.toString());
}
返回新的JSONObject().parse(response.toString()); }

回复代码:200 响应字符串:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>Error</title></head><body>     <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="100%" >        <!-- <tr> -->         <!-- <td class="dialog_header" colspan="3"> -->             <!-- <table cellpadding="0" cellspacing="0" border="0" width="100%"> -->                  <!-- <tr> -->                 <!-- <td /></td> -->                    <!-- <td  style="font-size:15px;"><span >Internal Server Error</span></td> -->                  <!-- <td ></td> -->               <!-- </tr> -->                <!-- </table> -->           <!-- </td> -->        <!-- </tr> -->          <tr>          <td style="width: 20px;"></td>          <td ><br />             The requested web page either has an error or does not exist.<br /><br />               Please contact your system administrator or customer support.<br /><br />           </td>           <td style="width: 20px;"></td>        </tr>     </table>     </body></html>
Error
请求的网页有错误或不存在。

请与您的系统管理员或管理员联系客户支持。


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