Java工具類——發送GET/POST請求工具

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.nio.charset.Charset;import java.util.Map;import java.util.Vector;/** * Java HTTP請求對象 發送GET/POST請求工具類 */public class HttpRequester {private String defaultContentEncoding;public HttpRequester() {this.defaultContentEncoding = Charset.defaultCharset().name();}/** * 發送GET請求 *  * @param urlString  URL地址 * @return 響應對象 * @throws IOException */public HttpRespons sendGet(String urlString) throws IOException {return this.send(urlString, "GET", null, null);}/** * 發送GET請求 *  * @param urlString  URL地址 * @param params 參數集合 * @return 響應對象 * @throws IOException */public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException {return this.send(urlString, "GET", params, null);}/** * 發送GET請求 *  * @param urlString URL地址 * @param params 參數集合 * @param propertys 請求屬性 * @return 響應對象 * @throws IOException */public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys)throws IOException {return this.send(urlString, "GET", params, propertys);}/** * 發送POST請求 *  * @param urlString URL地址 * @return 響應對象 * @throws IOException */public HttpRespons sendPost(String urlString) throws IOException {return this.send(urlString, "POST", null, null);}/** * 發送POST請求 *  * @param urlString URL地址 * @param params 參數集合 * @return 響應對象 * @throws IOException */public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException {return this.send(urlString, "POST", params, null);}/** * 發送POST請求 *  * @param urlString URL地址 * @param params 參數集合 * @param propertys 請求屬性 * @return 響應對象 * @throws IOException */public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys)throws IOException {return this.send(urlString, "POST", params, propertys);}/** * 發送HTTP請求 *  * @param urlString 地址 * @param method  get/post * @param parameters  添加由索引值對指定的請求參數 * @param propertys  添加由索引值對指定的一般請求屬性 * @return 響映對象 * @throws IOException */private HttpRespons send(String urlString, String method, Map<String, String> parameters,Map<String, String> propertys) throws IOException {HttpURLConnection urlConnection = null;if (method.equalsIgnoreCase("GET") && parameters != null) {StringBuffer param = new StringBuffer();int i = 0;for (String key : parameters.keySet()) {if (i == 0)param.append("?");elseparam.append("&");param.append(key).append("=").append(parameters.get(key));i++;}urlString += param;}URL url = new URL(urlString);urlConnection = (HttpURLConnection) url.openConnection();urlConnection.setRequestMethod(method);urlConnection.setDoOutput(true);urlConnection.setDoInput(true);urlConnection.setUseCaches(false);if (propertys != null)for (String key : propertys.keySet()) {urlConnection.addRequestProperty(key, propertys.get(key));}if (method.equalsIgnoreCase("POST") && parameters != null) {StringBuffer param = new StringBuffer();for (String key : parameters.keySet()) {param.append("&");param.append(key).append("=").append(parameters.get(key));}urlConnection.getOutputStream().write(param.toString().getBytes());urlConnection.getOutputStream().flush();urlConnection.getOutputStream().close();}return this.makeContent(urlString, urlConnection);}/** * 得到響應對象 *  * @param urlConnection * @return 響應對象 * @throws IOException */private HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) throws IOException {HttpRespons httpResponser = new HttpRespons();try {InputStream in = urlConnection.getInputStream();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));httpResponser.contentCollection = new Vector<String>();StringBuffer temp = new StringBuffer();String line = bufferedReader.readLine();while (line != null) {httpResponser.contentCollection.add(line);temp.append(line).append("\r\n");line = bufferedReader.readLine();}bufferedReader.close();String ecod = urlConnection.getContentEncoding();if (ecod == null)ecod = this.defaultContentEncoding;httpResponser.urlString = urlString;httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();httpResponser.file = urlConnection.getURL().getFile();httpResponser.host = urlConnection.getURL().getHost();httpResponser.path = urlConnection.getURL().getPath();httpResponser.port = urlConnection.getURL().getPort();httpResponser.protocol = urlConnection.getURL().getProtocol();httpResponser.query = urlConnection.getURL().getQuery();httpResponser.ref = urlConnection.getURL().getRef();httpResponser.userInfo = urlConnection.getURL().getUserInfo();httpResponser.content = new String(temp.toString().getBytes(), ecod);httpResponser.contentEncoding = ecod;httpResponser.code = urlConnection.getResponseCode();httpResponser.message = urlConnection.getResponseMessage();httpResponser.contentType = urlConnection.getContentType();httpResponser.method = urlConnection.getRequestMethod();httpResponser.connectTimeout = urlConnection.getConnectTimeout();httpResponser.readTimeout = urlConnection.getReadTimeout();return httpResponser;} catch (IOException e) {throw e;} finally {if (urlConnection != null)urlConnection.disconnect();}}/** * 預設的響應字元集 */public String getDefaultContentEncoding() {return this.defaultContentEncoding;}/** * 設定預設的響應字元集 */public void setDefaultContentEncoding(String defaultContentEncoding) {this.defaultContentEncoding = defaultContentEncoding;}}

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