/** *@param url 发送请求的url *@param param 请求参数 请求参数应该是 name=xx&pass=xxxx */ public static String sendGet(String url,String param){ String result=""; BufferedReader bfr=null; try { String urlName=url+"?"+param; URL realUrl=new URL(urlName); URLConnection conn=realUrl.openConnection(); conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-age", "Mozilla/4.0 (compatible;MSIE 6.0;Window NT 5.1;SV1)"); //建立实际的连接 conn.connect(); Map<String,List<String>> map=conn.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 BufferedRead输入流来读取URL的响应 bfr=new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while((line=bfr.readLine())!=null){ result+="\n"+line; } } catch (Exception e) { System.out.print("发送GET请求出现异常:"+e); e.printStackTrace(); }finally{ try { if(bfr!=null) bfr.close(); } catch (IOException ex) { ex.printStackTrace(); } } return result; } /** *@param url 发送请求的url *@param param 请求参数 请求参数应该是 name=xx&pass=xxxx */ public static String sendPost(String url,String param){ PrintWriter out=null; BufferedReader in=null; String result=""; try { URL realUrl=new URL(url); URLConnection conn=realUrl.openConnection(); //设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-age", "Mozilla/4.0 (compatible;MSIE 6.0;Window NT 5.1;SV1)"); //发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); out=new PrintWriter(conn.getOutputStream()); out.print(param); out.flush(); in=new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while((line=in.readLine())!=null){ result+="\n"+line; } } catch (Exception e) { System.out.println("发送POST请求出现异常:"+e); e.printStackTrace(); }finally{ try { if(out!=null) out.close(); if(in!=null) in.close(); } catch (IOException ex) { ex.printStackTrace(); } } return result; }
Get 发送 数据
public String getJosnByUrl(String url) { StringBuffer josn = new StringBuffer(); BufferedReader reader = null; InputStream inputStream = null; HttpURLConnection httpURLConnection = null; try { URL httpUrl = new URL(url); URLConnection connection = httpUrl.openConnection(); httpURLConnection = (HttpURLConnection) connection; httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); httpURLConnection.setReadTimeout(30000);// 无响应30秒,断开会话 httpURLConnection.setConnectTimeout(30000); httpURLConnection.setRequestMethod("GET"); httpURLConnection.setRequestProperty("Referer","http://taobao.51bi.com"); httpURLConnection.setRequestProperty("Accept-Language","zh-cn"); httpURLConnection.setRequestProperty("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; MALC)"); httpURLConnection.connect(); inputStream = httpURLConnection.getInputStream();// 发送连接 reader = new BufferedReader(new InputStreamReader(inputStream,"utf-8")); String line = null; while ((line = reader.readLine()) != null) { josn.append(line); } } catch (Exception e) { e.printStackTrace(); } finally { try { if(reader != null) reader.close(); if(inputStream != null) inputStream.close(); if(httpURLConnection != null) httpURLConnection.disconnect(); } catch (IOException e) { e.printStackTrace(); } } return josn.toString().trim(); }
post 发送数据xml 或者json 然后读取返回值
public String getJosnByUrl(String url,String param) { StringBuffer josn = new StringBuffer(); BufferedReader reader = null; PrintWriter out=null; InputStream inputStream = null; HttpURLConnection httpURLConnection = null; try { URL httpUrl = new URL(url); URLConnection connection = httpUrl.openConnection(); httpURLConnection = (HttpURLConnection) connection; httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); httpURLConnection.setReadTimeout(30000);// 无响应30秒,断开会话 httpURLConnection.setConnectTimeout(30000); httpURLConnection.setRequestMethod("POST"); //httpURLConnection.setRequestProperty("Referer","http://taobao.51bi.com"); httpURLConnection.setRequestProperty("Accept-Language","zh-cn"); httpURLConnection.setRequestProperty("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; MALC)"); httpURLConnection.connect(); out=new PrintWriter(httpURLConnection.getOutputStream()); out.write(param);//数据写入缓存中 out.flush(); inputStream = httpURLConnection.getInputStream();// 发送连接 reader = new BufferedReader(new InputStreamReader(inputStream,"utf-8")); String line = null; while ((line = reader.readLine()) != null) { josn.append(line); } } catch (Exception e) { e.printStackTrace(); } finally { try { if(out!=null) out.close(); if(reader != null) reader.close(); if(inputStream != null) inputStream.close(); if(httpURLConnection != null) httpURLConnection.disconnect(); } catch (IOException e) { e.printStackTrace(); } } return josn.toString().trim(); }