HttpClient工具类

jopen 10年前

package com.cucpay.tradeportal.util;    import java.io.IOException;  import java.io.InputStream;  import java.io.OutputStream;  import java.net.HttpURLConnection;  import java.net.URL;  import java.security.cert.CertificateException;  import java.security.cert.X509Certificate;  import java.util.ArrayList;  import java.util.HashMap;  import java.util.List;  import java.util.Map;    import javax.net.ssl.SSLContext;  import javax.net.ssl.TrustManager;  import javax.net.ssl.X509TrustManager;    import org.apache.http.HttpEntity;  import org.apache.http.HttpResponse;  import org.apache.http.NameValuePair;  import org.apache.http.ParseException;  import org.apache.http.client.ClientProtocolException;  import org.apache.http.client.HttpClient;  import org.apache.http.client.entity.UrlEncodedFormEntity;  import org.apache.http.client.methods.HttpGet;  import org.apache.http.client.methods.HttpPost;  import org.apache.http.client.utils.URLEncodedUtils;  import org.apache.http.conn.scheme.Scheme;  import org.apache.http.conn.ssl.SSLSocketFactory;  import org.apache.http.entity.StringEntity;  import org.apache.http.impl.client.DefaultHttpClient;  import org.apache.http.message.BasicNameValuePair;  import org.apache.http.protocol.HTTP;  import org.apache.http.util.EntityUtils;    /**   * 封装了一些采用HttpClient发送HTTP请求的方法   * @see 本工具所采用的是最新的HttpComponents-Client-4.2.1   * @see 关于本工具类中的一些解释说明,可参考下方列出的我的三篇文章   * @see http://blog.csdn.net/jadyer/article/details/7615830   * @see http://blog.csdn.net/jadyer/article/details/7615880   * @see http://blog.csdn.net/jadyer/article/details/7802139   * @create Feb 1, 2012 3:02:27 PM   * @update Oct 8, 2012 3:48:55 PM   * @author 玄玉<http://blog.csdn/net/jadyer>   * @version v1.3   * @history v1.0-->新建<code>sendGetRequest(String,String)</code>和<code>sendPostRequest(String,Map<String,String>,String,String)</code>方法   * @history v1.1-->新增<code>sendPostSSLRequest(String,Map<String,String>,String,String)</code>方法,用于发送HTTPS的POST请求   * @history v1.2-->新增<code>sendPostRequest(String,String,boolean,String,String)</code>方法,用于发送HTTP协议报文体为任意字符串的POST请求   * @history v1.3-->新增<code>java.net.HttpURLConnection</code>实现的<code>sendPostRequestByJava()</code>方法   */  public class HttpClientUtil {   private HttpClientUtil(){}      /**    * 发送HTTP_GET请求    * @see 该方法会自动关闭连接,释放资源    * @param requestURL    请求地址(含参数)    * @param decodeCharset 解码字符集,解析响应数据时用之,其为null时默认采用UTF-8解码    * @return 远程主机响应正文    */   public static String sendGetRequest(String reqURL, String decodeCharset){    long responseLength = 0;       //响应长度    String responseContent = null; //响应内容    HttpClient httpClient = new DefaultHttpClient(); //创建默认的httpClient实例    HttpGet httpGet = new HttpGet(reqURL);           //创建org.apache.http.client.methods.HttpGet    try{     HttpResponse response = httpClient.execute(httpGet); //执行GET请求     HttpEntity entity = response.getEntity();            //获取响应实体     if(null != entity){      responseLength = entity.getContentLength();      responseContent = EntityUtils.toString(entity, decodeCharset==null ? "UTF-8" : decodeCharset);      EntityUtils.consume(entity); //Consume response content     }     System.out.println("请求地址: " + httpGet.getURI());     System.out.println("响应状态: " + response.getStatusLine());     System.out.println("响应长度: " + responseLength);     System.out.println("响应内容: " + responseContent);    }catch(ClientProtocolException e){     LogUtil.getLogger().error("该异常通常是协议错误导致,比如构造HttpGet对象时传入的协议不对(将'http'写成'htp')或者服务器端返回的内容不符合HTTP协议要求等,堆栈信息如下", e);    }catch(ParseException e){     LogUtil.getLogger().error(e.getMessage(), e);    }catch(IOException e){     LogUtil.getLogger().error("该异常通常是网络原因引起的,如HTTP服务器未启动等,堆栈信息如下", e);    }finally{     httpClient.getConnectionManager().shutdown(); //关闭连接,释放资源    }    return responseContent;   }         /**    * 发送HTTP_POST请求    * @see 该方法为<code>sendPostRequest(String,String,boolean,String,String)</code>的简化方法    * @see 该方法在对请求数据的编码和响应数据的解码时,所采用的字符集均为UTF-8    * @see 当<code>isEncoder=true</code>时,其会自动对<code>sendData</code>中的[中文][|][ ]等特殊字符进行<code>URLEncoder.encode(string,"UTF-8")</code>    * @param isEncoder 用于指明请求数据是否需要UTF-8编码,true为需要    */   public static String sendPostRequest(String reqURL, String sendData, boolean isEncoder){    return sendPostRequest(reqURL, sendData, isEncoder, null, null);   }         /**    * 发送HTTP_POST请求    * @see 该方法会自动关闭连接,释放资源    * @see 当<code>isEncoder=true</code>时,其会自动对<code>sendData</code>中的[中文][|][ ]等特殊字符进行<code>URLEncoder.encode(string,encodeCharset)</code>    * @param reqURL        请求地址    * @param sendData      请求参数,若有多个参数则应拼接成param11=value11¶m22=value22¶m33=value33的形式后,传入该参数中    * @param isEncoder     请求数据是否需要encodeCharset编码,true为需要    * @param encodeCharset 编码字符集,编码请求数据时用之,其为null时默认采用UTF-8解码    * @param decodeCharset 解码字符集,解析响应数据时用之,其为null时默认采用UTF-8解码    * @return 远程主机响应正文    */   public static String sendPostRequest(String reqURL, String sendData, boolean isEncoder, String encodeCharset, String decodeCharset){    String responseContent = null;    HttpClient httpClient = new DefaultHttpClient();        HttpPost httpPost = new HttpPost(reqURL);    //httpPost.setHeader(HTTP.CONTENT_TYPE, "application/x-www-form-urlencoded; charset=UTF-8");    httpPost.setHeader(HTTP.CONTENT_TYPE, "application/x-www-form-urlencoded");    try{     if(isEncoder){      List<NameValuePair> formParams = new ArrayList<NameValuePair>();      for(String str : sendData.split("&")){       formParams.add(new BasicNameValuePair(str.substring(0,str.indexOf("=")), str.substring(str.indexOf("=")+1)));      }      httpPost.setEntity(new StringEntity(URLEncodedUtils.format(formParams, encodeCharset==null ? "UTF-8" : encodeCharset)));     }else{      httpPost.setEntity(new StringEntity(sendData));     }          HttpResponse response = httpClient.execute(httpPost);     HttpEntity entity = response.getEntity();     if (null != entity) {      responseContent = EntityUtils.toString(entity, decodeCharset==null ? "UTF-8" : decodeCharset);      EntityUtils.consume(entity);     }    }catch(Exception e){     LogUtil.getLogger().error("与[" + reqURL + "]通信过程中发生异常,堆栈信息如下", e);    }finally{     httpClient.getConnectionManager().shutdown();    }    return responseContent;   }         /**    * 发送HTTP_POST请求    * @see 该方法会自动关闭连接,释放资源    * @see 该方法会自动对<code>params</code>中的[中文][|][ ]等特殊字符进行<code>URLEncoder.encode(string,encodeCharset)</code>    * @param reqURL        请求地址    * @param params        请求参数    * @param encodeCharset 编码字符集,编码请求数据时用之,其为null时默认采用UTF-8解码    * @param decodeCharset 解码字符集,解析响应数据时用之,其为null时默认采用UTF-8解码    * @return 远程主机响应正文    */   public static String sendPostRequest(String reqURL, Map<String, String> params, String encodeCharset, String decodeCharset){    String responseContent = null;    HttpClient httpClient = new DefaultHttpClient();        HttpPost httpPost = new HttpPost(reqURL);    List<NameValuePair> formParams = new ArrayList<NameValuePair>(); //创建参数队列    for(Map.Entry<String,String> entry : params.entrySet()){     formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));    }    try{     httpPost.setEntity(new UrlEncodedFormEntity(formParams, encodeCharset==null ? "UTF-8" : encodeCharset));          HttpResponse response = httpClient.execute(httpPost);     HttpEntity entity = response.getEntity();     if (null != entity) {      responseContent = EntityUtils.toString(entity, decodeCharset==null ? "UTF-8" : decodeCharset);      EntityUtils.consume(entity);     }    }catch(Exception e){     LogUtil.getLogger().error("与[" + reqURL + "]通信过程中发生异常,堆栈信息如下", e);    }finally{     httpClient.getConnectionManager().shutdown();    }    return responseContent;   }         /**    * 发送HTTPS_POST请求    * @see 该方法为<code>sendPostSSLRequest(String,Map<String,String>,String,String)</code>方法的简化方法    * @see 该方法在对请求数据的编码和响应数据的解码时,所采用的字符集均为UTF-8    * @see 该方法会自动对<code>params</code>中的[中文][|][ ]等特殊字符进行<code>URLEncoder.encode(string,"UTF-8")</code>    */   public static String sendPostSSLRequest(String reqURL, Map<String, String> params){    return sendPostSSLRequest(reqURL, params, null, null);   }         /**    * 发送HTTPS_POST请求    * @see 该方法会自动关闭连接,释放资源    * @see 该方法会自动对<code>params</code>中的[中文][|][ ]等特殊字符进行<code>URLEncoder.encode(string,encodeCharset)</code>    * @param reqURL        请求地址    * @param params        请求参数    * @param encodeCharset 编码字符集,编码请求数据时用之,其为null时默认采用UTF-8解码    * @param decodeCharset 解码字符集,解析响应数据时用之,其为null时默认采用UTF-8解码    * @return 远程主机响应正文    */   public static String sendPostSSLRequest(String reqURL, Map<String, String> params, String encodeCharset, String decodeCharset){    String responseContent = "";    HttpClient httpClient = new DefaultHttpClient();    X509TrustManager xtm = new X509TrustManager(){     public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}     public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}     public X509Certificate[] getAcceptedIssuers() {return null;}    };    try {     SSLContext ctx = SSLContext.getInstance("TLS");     ctx.init(null, new TrustManager[]{xtm}, null);     SSLSocketFactory socketFactory = new SSLSocketFactory(ctx);     httpClient.getConnectionManager().getSchemeRegistry().register(new Scheme("https", 443, socketFactory));          HttpPost httpPost = new HttpPost(reqURL);     List<NameValuePair> formParams = new ArrayList<NameValuePair>();     for(Map.Entry<String,String> entry : params.entrySet()){      formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));     }     httpPost.setEntity(new UrlEncodedFormEntity(formParams, encodeCharset==null ? "UTF-8" : encodeCharset));          HttpResponse response = httpClient.execute(httpPost);     HttpEntity entity = response.getEntity();     if (null != entity) {      responseContent = EntityUtils.toString(entity, decodeCharset==null ? "UTF-8" : decodeCharset);      EntityUtils.consume(entity);     }    } catch (Exception e) {     LogUtil.getLogger().error("与[" + reqURL + "]通信过程中发生异常,堆栈信息为", e);    } finally {     httpClient.getConnectionManager().shutdown();    }    return responseContent;   }         /**    * 发送HTTP_POST请求    * @see 若发送的<code>params</code>中含有中文,记得按照双方约定的字符集将中文<code>URLEncoder.encode(string,encodeCharset)</code>    * @see 本方法默认的连接超时时间为30秒,默认的读取超时时间为30秒    * @param reqURL 请求地址    * @param params 发送到远程主机的正文数据,其数据类型为<code>java.util.Map<String, String></code>    * @return 远程主机响应正文`HTTP状态码,如<code>"SUCCESS`200"</code><br>若通信过程中发生异常则返回"Failed`HTTP状态码",如<code>"Failed`500"</code>    */   public static String sendPostRequestByJava(String reqURL, Map<String, String> params){    StringBuilder sendData = new StringBuilder();    for(Map.Entry<String, String> entry : params.entrySet()){     sendData.append(entry.getKey()).append("=").append(entry.getValue()).append("&");    }    if(sendData.length() > 0){     sendData.setLength(sendData.length() - 1); //删除最后一个&符号    }    return sendPostRequestByJava(reqURL, sendData.toString());   }         /**    * 发送HTTP_POST请求    * @see 若发送的<code>sendData</code>中含有中文,记得按照双方约定的字符集将中文<code>URLEncoder.encode(string,encodeCharset)</code>    * @see 本方法默认的连接超时时间为30秒,默认的读取超时时间为30秒    * @param reqURL   请求地址    * @param sendData 发送到远程主机的正文数据    * @return 远程主机响应正文`HTTP状态码,如<code>"SUCCESS`200"</code><br>若通信过程中发生异常则返回"Failed`HTTP状态码",如<code>"Failed`500"</code>    */   public static String sendPostRequestByJava(String reqURL, String sendData){    HttpURLConnection httpURLConnection = null;    OutputStream out = null; //写    InputStream in = null;   //读    int httpStatusCode = 0;  //远程主机响应的HTTP状态码    try{     URL sendUrl = new URL(reqURL);     httpURLConnection = (HttpURLConnection)sendUrl.openConnection();     httpURLConnection.setRequestMethod("POST");     httpURLConnection.setDoOutput(true);        //指示应用程序要将数据写入URL连接,其值默认为false     httpURLConnection.setUseCaches(false);     httpURLConnection.setConnectTimeout(30000); //30秒连接超时     httpURLConnection.setReadTimeout(30000);    //30秒读取超时          out = httpURLConnection.getOutputStream();     out.write(sendData.toString().getBytes());          //清空缓冲区,发送数据     out.flush();          //获取HTTP状态码     httpStatusCode = httpURLConnection.getResponseCode();          //该方法只能获取到[HTTP/1.0 200 OK]中的[OK]     //若对方响应的正文放在了返回报文的最后一行,则该方法获取不到正文,而只能获取到[OK],稍显遗憾     //respData = httpURLConnection.getResponseMessage();       //   //处理返回结果  //   BufferedReader br = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));  //   String row = null;  //   String respData = "";  //   if((row=br.readLine()) != null){ //readLine()方法在读到换行[\n]或回车[\r]时,即认为该行已终止  //    respData = row;              //HTTP协议POST方式的最后一行数据为正文数据  //   }  //   br.close();          in = httpURLConnection.getInputStream();                  byte[] byteDatas = new byte[in.available()];     in.read(byteDatas);     return new String(byteDatas) + "`" + httpStatusCode;    }catch(Exception e){     LogUtil.getLogger().error(e.getMessage());     return "Failed`" + httpStatusCode;    }finally{     if(out != null){      try{       out.close();      }catch (Exception e){       LogUtil.getLogger().error("关闭输出流时发生异常,堆栈信息如下", e);      }     }     if(in != null){      try{       in.close();      }catch(Exception e){       LogUtil.getLogger().error("关闭输入流时发生异常,堆栈信息如下", e);      }     }     if(httpURLConnection != null){      httpURLConnection.disconnect();      httpURLConnection = null;     }    }   }  }
来自:http://blog.csdn.net/jadyer/article/details/8087960