java后台调用HttpURLConnection类模拟浏览器请求实例(可用于接口调用)
一般在项目开发中难免遇到外部接口的调用,本文实例讲述了java后台调用HttpURLConnection类模拟浏览器请求的方法。可用于接口调用。分享给大家供大家参考。具体实现方法如下：
packagecom.cplatform.movie.back.test;
importjava.io.BufferedReader; importjava.io.DataOutputStream; importjava.io.InputStreamReader; importjava.net.HttpURLConnection; importjava.net.URL; importjava.net.URLEncoder;
publicclassHttpURLConnectionTest{ publicstaticfinalStringGET_URL="http://112.4.27.9/mall-back/if_user/store_list?storeId=32"; publicstaticfinalStringPOST_URL="http://112.4.27.9/mall-back/if_user/store_list"; /** *接口调用GET */ publicstaticvoidhttpURLConectionGET(){ try{ URLurl=newURL(GET_URL); //把字符串转换为URL请求地址 HttpURLConnectionconnection=(HttpURLConnection)url.openConnection();//打开连接 connection.connect();//连接会话 //获取输入流 BufferedReaderbr=newBufferedReader(newInputStreamReader(connection.getInputStream())); Stringline; StringBuildersb=newStringBuilder(); while((line=br.readLine())!=null){//循环读取流 sb.append(line); } br.close();//关闭流 connection.disconnect();//断开连接 System.out.println(sb.toString()); }catch(Exceptione){ e.printStackTrace(); System.out.println("失败!"); } } /** *接口调用 POST */ publicstaticvoidhttpURLConnectionPOST(){ try{ URLurl=newURL(POST_URL); //将url以open方法返回的urlConnection 连接强转为HttpURLConnection连接 (标识一个url所引用的远程对象连接) HttpURLConnectionconnection=(HttpURLConnection)url.openConnection();//此时cnnection只是为一个连接对象,待连接中 //设置连接输出流为true,默认false(post请求是以流的方式隐式的传递参数) connection.setDoOutput(true); //设置连接输入流为true connection.setDoInput(true); //设置请求方式为post connection.setRequestMethod("POST"); //post请求缓存设为false connection.setUseCaches(false); //设置该HttpURLConnection实例是否自动执行重定向 connection.setInstanceFollowRedirects(true); //设置请求头里面的各个属性(以下为设置内容的类型,设置为经过urlEncoded编码过的from参数) //application/x-javascripttext/xml->xml数据application/x-javascript->json对象application/x-www-form-urlencoded->表单数据 connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); //建立连接(请求未开始,直到connection.getInputStream()方法调用时才发起,以上各个参数设置需在此方法之前进行) connection.connect(); //创建输入输出流,用于往连接里面输出携带的参数,(输出内容为?后面的内容) DataOutputStreamdataout=newDataOutputStream(connection.getOutputStream()); Stringparm="storeId="+URLEncoder.encode("32","utf-8");//URLEncoder.encode()方法 为字符串进行编码 //将参数输出到连接 dataout.writeBytes(parm); //输出完成后刷新并关闭流 dataout.flush(); dataout.close();//重要且易忽略步骤(关闭流,切记!) System.out.println(connection.getResponseCode()); //连接发起请求,处理服务器响应 (从连接获取到输入流并包装为bufferedReader) BufferedReaderbf=newBufferedReader(newInputStreamReader(connection.getInputStream())); Stringline; StringBuildersb=newStringBuilder();//用来存储响应数据 //循环读取流,若不到结尾处 while((line=bf.readLine())!=null){ sb.append(bf.readLine()); } bf.close(); //重要且易忽略步骤(关闭流,切记!) connection.disconnect();//销毁连接 System.out.println(sb.toString()); }catch(Exceptione){ e.printStackTrace(); } } publicstaticvoidmain(String[]args){ // httpURLConectionGET(); httpURLConnectionPOST(); } }