小编教你HttpPost方式调使用接口的3种方式

直接上代码

第一种：需要httpclient的依赖包

org.apache.httpcomponents

httpclient

4.3.5

会使用到httpcore-4.3.5.jar和httpcore-4.3.2.jar

public static String callBgrsjk(String requestParams) {

String url = null;

JSONObject jb=new JSONObject();

jb.put("code",0);

try {

CloseableHttpClient httpClient = HttpClients.createDefault();

RequestConfig requestConfig = RequestConfig.custom()

.setSocketTimeout(300 * 1000)

.setConnectTimeout(300 * 1000)

.build();

url = "http://URL:Port/地址";

HttpPost post = new HttpPost(url);

post.setConfig(requestConfig);

post.setHeader("Content-Type","application/json;charset=utf-8");

StringEntity postingString = new StringEntity(requestParams,

"utf-8");

post.setEntity(postingString);

HttpResponse response = httpClient.execute(post);

String content = EntityUtils.toString(response.getEntity());

System.out.println(content);

return content;

} catch (SocketTimeoutException e) {

LoggerUtil.error("调使用Dat+"

+ ".aService接口超时,超时时间:" + 300

+ "秒,url:" + url + ",参数：" + requestParams, e);

return jb.toString();

} catch (Exception e) {

LoggerUtil.error("调使用DataService接口失败,url:" + url + ",参数：" + requestParams,

e);

return jb.toString();

}

}

第二种：用jdk中的URL

/**

* 发送Http post请求

*

* @param xmlInfo

* json转化成的字符串

* @param URL

* 请求url

* @return 返回信息

*/

public static String doHttpPost(String xmlInfo, String URL) {

System.out.println("发起的数据:" + xmlInfo);

byte[] xmlData = xmlInfo.getBytes();

InputStream instr = null;

java.io.ByteArrayOutputStream out = null;

try {

URL url = new URL(URL);

URLConnection urlCon = url.openConnection();

urlCon.setDoOutput(true);

urlCon.setDoInput(true);

urlCon.setUseCaches(false);

urlCon.setRequestProperty("content-Type", "application/json");

urlCon.setRequestProperty("charset", "utf-8");

urlCon.setRequestProperty("Content-length",

String.valueOf(xmlData.length));

System.out.println(String.valueOf(xmlData.length));

DataOutputStream printout = new DataOutputStream(

urlCon.getOutputStream());

printout.write(xmlData);

printout.flush();

printout.close();

instr = urlCon.getInputStream();

byte[] bis = IOUtils.toByteArray(instr);

String ResponseString = new String(bis, "UTF-8");

if ((ResponseString == null) || ("".equals(ResponseString.trim()))) {

System.out.println("返回空");

}

System.out.println("返回数据为:" + ResponseString);

return ResponseString;

} catch (Exception e) {

e.printStackTrace();

return "0";

} finally {

try {

if(out!=null){

out.close();

}

if(instr!=null){

instr.close();

}

} catch (Exception ex) {

return "0";

}

}

}

第三种：用apache的commons包

/**

* 发送post请求

*

* @param params

* 参数

* @param requestUrl

* 请求地址

* @param authorization

* 受权书

* @return 返回结果

* @throws IOException

*/

public static String sendPost(String params, String requestUrl,

String authorization) throws IOException {

byte[] requestBytes = params.getBytes("utf-8"); // 将参数转为二进制流

HttpClient httpClient = new HttpClient();// 用户端实例化

PostMethod postMethod = new PostMethod(requestUrl);

//设置请求头Authorization

//postMethod.setRequestHeader("Authorization", "Basic " + authorization);

// 设置请求头 Content-Type

postMethod.setRequestHeader("Content-Type", "application/json");

InputStream inputStream = new ByteArrayInputStream(requestBytes, 0,

requestBytes.length);

RequestEntity requestEntity = new InputStreamRequestEntity(inputStream,

requestBytes.length, "application/json; charset=utf-8"); // 请求体

postMethod.setRequestEntity(requestEntity);

httpClient.executeMethod(postMethod);// 执行请求

InputStream soapResponseStream = postMethod.getResponseBodyAsStream();// 获取返回的流

byte[] datas = null;

try {

datas = readInputStream(soapResponseStream);// 从输入流中读取数据

} catch (Exception e) {

e.printStackTrace();

}

String result = new String(datas, "UTF-8");// 将二进制流转为String

// 打印返回结果

// System.out.println(result);

return result;

}

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