java实现http的Post、Get、代理访问请求
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2024-03-08 20:26:52
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
package com.snowfigure...
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
package com.snowfigure.kits.net; import java.io.bufferedreader; import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.io.outputstreamwriter; import java.io.unsupportedencodingexception; import java.net.httpurlconnection; import java.net.inetsocketaddress; import java.net.proxy; import java.net.url; import java.net.urlconnection; import java.util.list; import java.util.map; /** * http请求工具类 * @author snowfigure * @since 2014-8-24 13:30:56 * @version v1.0.1 */ public class httprequestutil { static boolean proxyset = false; static string proxyhost = "127.0.0.1"; static int proxyport = 8087; /** * 编码 * @param source * @return */ public static string urlencode(string source,string encode) { string result = source; try { result = java.net.urlencoder.encode(source,encode); } catch (unsupportedencodingexception e) { e.printstacktrace(); return "0"; } return result; } public static string urlencodegbk(string source) { string result = source; try { result = java.net.urlencoder.encode(source,"gbk"); } catch (unsupportedencodingexception e) { e.printstacktrace(); return "0"; } return result; } /** * 发起http请求获取返回结果 * @param req_url 请求地址 * @return */ public static string httprequest(string req_url) { stringbuffer buffer = new stringbuffer(); try { url url = new url(req_url); httpurlconnection httpurlconn = (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 inputstream inputstream = httpurlconn.getinputstream(); inputstreamreader inputstreamreader = new inputstreamreader(inputstream, "utf-8"); bufferedreader bufferedreader = new bufferedreader(inputstreamreader); string str = null; while ((str = bufferedreader.readline()) != null) { buffer.append(str); } bufferedreader.close(); inputstreamreader.close(); // 释放资源 inputstream.close(); inputstream = null; httpurlconn.disconnect(); } catch (exception e) { system.out.println(e.getstacktrace()); } return buffer.tostring(); } /** * 发送http请求取得返回的输入流 * @param requesturl 请求地址 * @return inputstream */ public static inputstream httprequestio(string requesturl) { inputstream inputstream = null; try { url url = new url(requesturl); httpurlconnection httpurlconn = (httpurlconnection) url.openconnection(); httpurlconn.setdoinput(true); httpurlconn.setrequestmethod("get"); httpurlconn.connect(); // 获得返回的输入流 inputstream = httpurlconn.getinputstream(); } catch (exception e) { e.printstacktrace(); } return inputstream; } /** * 向指定url发送get方法的请求 * * @param url * 发送请求的url * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @return url 所代表远程资源的响应结果 */ public static string sendget(string url, string param) { string result = ""; bufferedreader in = null; try { string urlnamestring = url + "?" + param; url realurl = new url(urlnamestring); // 打开和url之间的连接 urlconnection connection = 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; msie 6.0; windows nt 5.1;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 (string key : map.keyset()) { system.out.println(key + "--->" + map.get(key)); } // 定义 bufferedreader输入流来读取url的响应 in = new bufferedreader(new inputstreamreader( connection.getinputstream())); string line; while ((line = in.readline()) != null) { result += line; } } catch (exception e) { 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 (exception e2) { e2.printstacktrace(); } } return result; } /** * 向指定 url 发送post方法的请求 * * @param url * 发送请求的 url * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @param isproxy * 是否使用代理模式 * @return 所代表远程资源的响应结果 */ public static string sendpost(string url, string param,boolean isproxy) { outputstreamwriter out = null; bufferedreader in = null; string result = ""; try { url realurl = new url(url); httpurlconnection conn = null; if(isproxy){//使用代理模式 @suppresswarnings("static-access") proxy proxy = new proxy(proxy.type.direct.http, new inetsocketaddress(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; msie 6.0; windows nt 5.1;sv1)"); conn.setrequestproperty("content-type", "application/x-www-form-urlencoded"); conn.connect(); // 获取urlconnection对象对应的输出流 out = new outputstreamwriter(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 = new bufferedreader( new inputstreamreader(conn.getinputstream())); string line; while ((line = in.readline()) != null) { result += line; } } catch (exception e) { 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(ioexception ex){ ex.printstacktrace(); } } return result; } public static void main(string[] args) { //demo:代理访问 string url = "http://api.adf.ly/api.php"; string para = "key=youkeyid&youuid=uid&advert_type=int&domain=adf.ly&url=http://somewebsite.com"; string sr=httprequestutil.sendpost(url,para,true); system.out.println(sr); } }
希望本文所述对大家学习java程序设计有所帮助。
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