HttpUtils(POST/GET)

1.maven依赖

<dependency><groupId>commons-collections</groupId><artifactId>commons-collections</artifactId><version>3.2.2</version>
</dependency>
<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.2</version>
</dependency>
<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4</version>
</dependency>

2.HttpUtils(POST/GET)

public final class HttpUtils {private HttpUtils() {}/*** contentType: application/json*/public static String post(String address, Map<String, String> headers, String body) {StringBuilder sb = new StringBuilder();try {CloseableHttpClient httpclient = HttpClientBuilder.create().build();HttpPost httpPost = new HttpPost(address);if (StringUtils.isNotBlank(body)) {StringEntity stringEntity = new StringEntity(body);stringEntity.setContentEncoding("UTF-8");stringEntity.setContentType("application/json");httpPost.setEntity(stringEntity);}if (MapUtils.isNotEmpty(headers)) {setHeaders(httpPost, headers);}HttpResponse response = httpclient.execute(httpPost);if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){sb.append(EntityUtils.toString(response.getEntity()));}httpPost.releaseConnection();} catch (Exception e) {throw new RuntimeException("网络请求失败");}return sb.toString();}/*** contentType: key/value*/public static String post(String address, Map<String, String> headers,  Map<String, String> paramsMap) {StringBuilder sb = new StringBuilder();try {CloseableHttpClient httpclient = HttpClientBuilder.create().build();HttpPost httpPost = new HttpPost(StringUtils.trim(address));if (MapUtils.isNotEmpty(paramsMap)) {List<NameValuePair> params = getParams(paramsMap);httpPost.setEntity(new UrlEncodedFormEntity(params));}if (MapUtils.isNotEmpty(headers)) {setHeaders(httpPost, headers);}CloseableHttpResponse response = httpclient.execute(httpPost);if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){sb.append(EntityUtils.toString(response.getEntity(), "utf-8"));}httpPost.releaseConnection();} catch (Exception e) {e.printStackTrace();}return sb.toString();}/*** GET (INCLUDE HEADERS)*/public static String get(String address, Map<String, String> headers) {StringBuilder sb = new StringBuilder();try {CloseableHttpClient httpclient = HttpClientBuilder.create().build();HttpGet httpGet = new HttpGet(StringUtils.trim(address));if (MapUtils.isNotEmpty(headers)) {setHeaders(httpGet, headers);}CloseableHttpResponse response = httpclient.execute(httpGet);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {sb.append(EntityUtils.toString(response.getEntity(), "utf-8"));}httpGet.releaseConnection();} catch (Exception e) {e.printStackTrace();}return sb.toString();}private static void setHeaders(HttpRequestBase request, Map<String, String> headers) {for (Map.Entry<String, String> entry : headers.entrySet()) {request.setHeader(entry.getKey(), entry.getValue());}}private static List<NameValuePair> getParams(Map<String, String> paramsMap) {List<NameValuePair> params = new ArrayList<>();for (String key : paramsMap.keySet()) {params.add(new BasicNameValuePair(key, paramsMap.get(key)));}return params;}
}

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