java实现http的Post、Get、代理访问请求
本文实例讲解了java实现http的Post、Get、代理访问请求的详细代码片段,分享给大家供大家参考,具体内容如下
packagecom.snowfigure.kits.net; importjava.io.BufferedReader; importjava.io.IOException; importjava.io.InputStream; importjava.io.InputStreamReader; importjava.io.OutputStreamWriter; importjava.io.UnsupportedEncodingException; importjava.net.HttpURLConnection; importjava.net.InetSocketAddress; importjava.net.Proxy; importjava.net.URL; importjava.net.URLConnection; importjava.util.List; importjava.util.Map; /** *Http请求工具类 *@authorsnowfigure *@since2014-8-2413:30:56 *@versionv1.0.1 */ publicclassHttpRequestUtil{ staticbooleanproxySet=false; staticStringproxyHost="127.0.0.1"; staticintproxyPort=8087; /** *编码 *@paramsource *@return */ publicstaticStringurlEncode(Stringsource,Stringencode){ Stringresult=source; try{ result=java.net.URLEncoder.encode(source,encode); }catch(UnsupportedEncodingExceptione){ e.printStackTrace(); return"0"; } returnresult; } publicstaticStringurlEncodeGBK(Stringsource){ Stringresult=source; try{ result=java.net.URLEncoder.encode(source,"GBK"); }catch(UnsupportedEncodingExceptione){ e.printStackTrace(); return"0"; } returnresult; } /** *发起http请求获取返回结果 *@paramreq_url请求地址 *@return */ publicstaticStringhttpRequest(Stringreq_url){ StringBufferbuffer=newStringBuffer(); try{ URLurl=newURL(req_url); HttpURLConnectionhttpUrlConn=(HttpURLConnection)url.openConnection(); httpUrlConn.setDoOutput(false); httpUrlConn.setDoInput(true); httpUrlConn.setUseCaches(false); httpUrlConn.setRequestMethod("GET"); httpUrlConn.connect(); //将返回的输入流转换成字符串 InputStreaminputStream=httpUrlConn.getInputStream(); InputStreamReaderinputStreamReader=newInputStreamReader(inputStream,"utf-8"); BufferedReaderbufferedReader=newBufferedReader(inputStreamReader); Stringstr=null; while((str=bufferedReader.readLine())!=null){ buffer.append(str); } bufferedReader.close(); inputStreamReader.close(); //释放资源 inputStream.close(); inputStream=null; httpUrlConn.disconnect(); }catch(Exceptione){ System.out.println(e.getStackTrace()); } returnbuffer.toString(); } /** *发送http请求取得返回的输入流 *@paramrequestUrl请求地址 *@returnInputStream */ publicstaticInputStreamhttpRequestIO(StringrequestUrl){ InputStreaminputStream=null; try{ URLurl=newURL(requestUrl); HttpURLConnectionhttpUrlConn=(HttpURLConnection)url.openConnection(); httpUrlConn.setDoInput(true); httpUrlConn.setRequestMethod("GET"); httpUrlConn.connect(); //获得返回的输入流 inputStream=httpUrlConn.getInputStream(); }catch(Exceptione){ e.printStackTrace(); } returninputStream; } /** *向指定URL发送GET方法的请求 * *@paramurl *发送请求的URL *@paramparam *请求参数,请求参数应该是name1=value1&name2=value2的形式。 *@returnURL所代表远程资源的响应结果 */ publicstaticStringsendGet(Stringurl,Stringparam){ Stringresult=""; BufferedReaderin=null; try{ StringurlNameString=url+"?"+param; URLrealUrl=newURL(urlNameString); //打开和URL之间的连接 URLConnectionconnection=realUrl.openConnection(); //设置通用的请求属性 connection.setRequestProperty("accept","*/*"); connection.setRequestProperty("connection","Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;SV1)"); //建立实际的连接 connection.connect(); //获取所有响应头字段 Map<String,List<String>>map=connection.getHeaderFields(); //遍历所有的响应头字段 for(Stringkey:map.keySet()){ System.out.println(key+"--->"+map.get(key)); } //定义BufferedReader输入流来读取URL的响应 in=newBufferedReader(newInputStreamReader( connection.getInputStream())); Stringline; while((line=in.readLine())!=null){ result+=line; } }catch(Exceptione){ System.out.println("发送GET请求出现异常!"+e); e.printStackTrace(); } //使用finally块来关闭输入流 finally{ try{ if(in!=null){ in.close(); } }catch(Exceptione2){ e2.printStackTrace(); } } returnresult; } /** *向指定URL发送POST方法的请求 * *@paramurl *发送请求的URL *@paramparam *请求参数,请求参数应该是name1=value1&name2=value2的形式。 *@paramisproxy *是否使用代理模式 *@return所代表远程资源的响应结果 */ publicstaticStringsendPost(Stringurl,Stringparam,booleanisproxy){ OutputStreamWriterout=null; BufferedReaderin=null; Stringresult=""; try{ URLrealUrl=newURL(url); HttpURLConnectionconn=null; if(isproxy){//使用代理模式 @SuppressWarnings("static-access") Proxyproxy=newProxy(Proxy.Type.DIRECT.HTTP,newInetSocketAddress(proxyHost,proxyPort)); conn=(HttpURLConnection)realUrl.openConnection(proxy); }else{ conn=(HttpURLConnection)realUrl.openConnection(); } //打开和URL之间的连接 //发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); conn.setRequestMethod("POST");//POST方法 //设置通用的请求属性 conn.setRequestProperty("accept","*/*"); conn.setRequestProperty("connection","Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;SV1)"); conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); conn.connect(); //获取URLConnection对象对应的输出流 out=newOutputStreamWriter(conn.getOutputStream(),"UTF-8"); //发送请求参数 out.write(param); //flush输出流的缓冲 out.flush(); //定义BufferedReader输入流来读取URL的响应 in=newBufferedReader( newInputStreamReader(conn.getInputStream())); Stringline; while((line=in.readLine())!=null){ result+=line; } }catch(Exceptione){ System.out.println("发送POST请求出现异常!"+e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOExceptionex){ ex.printStackTrace(); } } returnresult; } publicstaticvoidmain(String[]args){ //demo:代理访问 Stringurl="http://api.adf.ly/api.php"; Stringpara="key=youkeyid&youuid=uid&advert_type=int&domain=adf.ly&url=http://somewebsite.com"; Stringsr=HttpRequestUtil.sendPost(url,para,true); System.out.println(sr); } }
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