java发送GET/POST请求工具类

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请求对象 发送GET/POST请求工具类   */  public class HttpRequester {     private String defaultContentEncoding;     public HttpRequester() {    this.defaultContentEncoding = Charset.defaultCharset().name();   }     /**    * 发送GET请求    *     * @param urlString  URL地址    * @return 响应对象    * @throws IOException    */   public HttpRespons sendGet(String urlString) throws IOException {    return this.send(urlString, "GET", null, null);   }     /**    * 发送GET请求    *     * @param urlString  URL地址    * @param params 参数集合    * @return 响应对象    * @throws IOException    */   public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException {    return this.send(urlString, "GET", params, null);   }     /**    * 发送GET请求    *     * @param urlString URL地址    * @param params 参数集合    * @param propertys 请求属性    * @return 响应对象    * @throws IOException    */   public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys)     throws IOException {    return this.send(urlString, "GET", params, propertys);   }     /**    * 发送POST请求    *     * @param urlString URL地址    * @return 响应对象    * @throws IOException    */   public HttpRespons sendPost(String urlString) throws IOException {    return this.send(urlString, "POST", null, null);   }     /**    * 发送POST请求    *     * @param urlString URL地址    * @param params 参数集合    * @return 响应对象    * @throws IOException    */   public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException {    return this.send(urlString, "POST", params, null);   }     /**    * 发送POST请求    *     * @param urlString URL地址    * @param params 参数集合    * @param propertys 请求属性    * @return 响应对象    * @throws IOException    */   public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys)     throws IOException {    return this.send(urlString, "POST", params, propertys);   }     /**    * 发送HTTP请求    *     * @param urlString 地址    * @param method  get/post    * @param parameters  添加由键值对指定的请求参数    * @param propertys  添加由键值对指定的一般请求属性    * @return 响映对象    * @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("?");      else       param.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);   }     /**    * 得到响应对象    *     * @param urlConnection    * @return 响应对象    * @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();    }   }     /**    * 默认的响应字符集    */   public String getDefaultContentEncoding() {    return this.defaultContentEncoding;   }     /**    * 设置默认的响应字符集    */   public void setDefaultContentEncoding(String defaultContentEncoding) {    this.defaultContentEncoding = defaultContentEncoding;   }  }