post方式的数据抓取
1 public static String sendPost(String url, String param) { 2 PrintWriter out = null; 3 BufferedReader in = null; 4 String result = ""; 5 try { 6 URL realUrl = new URL(url); 7 // 打开和URL之间的连接 8 URLConnection conn = realUrl.openConnection(); 9 // 设置通用的请求属性 10 conn.setRequestProperty("accept", "*/*"); 11 conn.setRequestProperty("connection", "Keep-Alive"); 12 conn.setRequestProperty("user-agent", 13 "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); 14 // 发送POST请求必须设置如下两行 15 conn.setDoOutput(true); 16 conn.setDoInput(true); 17 18 // 获取URLConnection对象对应的输出流 19 out = new PrintWriter(conn.getOutputStream()); 20 // 发送请求参数 21 out.print(param); 22 // flush输出流的缓冲 23 out.flush(); 24 // 定义BufferedReader输入流来读取URL的响应 25 in = new BufferedReader( 26 new InputStreamReader(conn.getInputStream())); 27 String line; 28 while ((line = in.readLine()) != null) { 29 result += line; 30 } 31 } catch (Exception e) { 32 System.out.println("发送 POST 请求出现异常!"+e); 33 e.printStackTrace(); 34 } 35 //使用finally块来关闭输出流、输入流 36 finally{ 37 try{ 38 if(out!=null){ 39 out.close(); 40 } 41 if(in!=null){ 42 in.close(); 43 } 44 } 45 catch(IOException ex){ 46 ex.printStackTrace(); 47 } 48 } 49 return result; 50 } 51
博客园地址:https://www.cnblogs.com/lixiuming521125/