封装Http工具类

package com.micropoplar.gm.common.util;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;/** * <p> * <date>2012-03-01</date><br/> * <span>软维提供的JAVA接口信息（短信，彩信）调用API</span><br/> * <span>----------基础访问方法-------------</span> * </p> *  * @author LIP * @version 1.0.1 */public class SmsClientAccessTool {  private static SmsClientAccessTool smsClientToolInstance;  /**   * 采用单列方式来访问操作   *    * @return   */  public static synchronized SmsClientAccessTool getInstance() {    if (smsClientToolInstance == null) {      smsClientToolInstance = new SmsClientAccessTool();    }    return smsClientToolInstance;  }  /**   * <p>   * POST方法   * </p>   *    * @param sendUrl ：访问URL   * @param  ：参数串   * @param backEncodType ：返回的编码   * @return   */  public String doAccessHTTPPost(String sendUrl, String sendParam, String backEncodType) {    StringBuffer receive = new StringBuffer();    BufferedWriter wr = null;    try {      if (backEncodType == null || backEncodType.equals("")) {        backEncodType = "UTF-8";      }      URL url = new URL(sendUrl);      HttpURLConnection URLConn = (HttpURLConnection) url.openConnection();      URLConn.setDoOutput(true);// 设置是否向httpUrlConnection输出 因为是post请求 参数需要放在http正文里面 所以需要设置为true 默认是为false      URLConn.setDoInput(true); //  设置是否从httpUrlConnection 读入  默认情况下是true      ((HttpURLConnection) URLConn).setRequestMethod("POST"); //  设置请求的方法 默认是GET 方法      URLConn.setUseCaches(false);   //  设置是否使用缓存      URLConn.setAllowUserInteraction(true);  //  设置      HttpURLConnection.setFollowRedirects(true);      URLConn.setInstanceFollowRedirects(true);      //  设置请求的参数类型  设置了默认的表单类型      URLConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");      URLConn.setRequestProperty("Content-Length", String.valueOf(sendParam.getBytes().length));      //  写数据与发送数据==========      //此处getOutputStream会隐含的进行connect(即：如同调用上面的connect()方法，      // 所以在开发中不调用上述的connect()也可以)。      //OutputStream outStrm = httpUrlConnection.getOutputStream();      DataOutputStream dos = new DataOutputStream(URLConn.getOutputStream());   //  相当于是连接http      dos.writeBytes(sendParam);      // 实际发送数据的代码片段在这里      BufferedReader rd =          new BufferedReader(new InputStreamReader(URLConn.getInputStream(), backEncodType));      String line;      while ((line = rd.readLine()) != null) {        receive.append(line).append("\r\n");      }      rd.close();    } catch (java.io.IOException e) {      receive.append("访问产生了异常-->").append(e.getMessage());      e.printStackTrace();    } finally {      if (wr != null) {        try {          wr.close();        } catch (IOException ex) {          ex.printStackTrace();        }        wr = null;      }    }    return receive.toString();  }  public String doAccessHTTPGet(String sendUrl, String backEncodType) {    StringBuffer receive = new StringBuffer();    BufferedReader in = null;    try {      if (backEncodType == null || backEncodType.equals("")) {        backEncodType = "UTF-8";      }      URL url = new URL(sendUrl);      HttpURLConnection URLConn = (HttpURLConnection) url.openConnection();      URLConn.setDoInput(true);      URLConn.setDoOutput(true);      URLConn.connect();      URLConn.getOutputStream().flush();      in = new BufferedReader(new InputStreamReader(URLConn.getInputStream(), backEncodType));      String line;      while ((line = in.readLine()) != null) {        receive.append(line).append("\r\n");      }    } catch (IOException e) {      receive.append("访问产生了异常-->").append(e.getMessage());      e.printStackTrace();    } finally {      if (in != null) {        try {          in.close();        } catch (java.io.IOException ex) {          ex.printStackTrace();        }        in = null;      }    }    return receive.toString();  }}