最近想自动发帖回帖，拿某论坛试验了一下，发现可行，不过后续没有再使用，以免影响论坛正常运行。

1、帖子链接的格式为
http://bbs.***.***.**/forum.php?mod=viewthread&tid=774210

最后面774210数字变化, 就可以得到不同的帖子

2、防止帖子发表会又被删了的情况, 进行判断帖子是否存在

3、递增后面的 id 数字, 对每个链接做回帖的 POST 请求

重难点

回帖需要用户登录信息
一种是利用Cookie
另一种是进行模拟登录

本文采用前者

判断 url 对应的帖子是否存在
有可能用户发了帖子，比如 url 为 http://bbs.***.***.**/forum.php?mod=viewthread&tid=774200

后来该帖子用户删除了或者被管理员删除了，虽然帖子不在了，但是该 tid=774200 还是存在的

public static boolean isExist(int id) { String tmpPath = baseRefer + id; URL url; try { url = new URL(tmpPath); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.addRequestProperty("Content-Type", "text/html; charset=UTF-8"); con.addRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36"); con.addRequestProperty("Referer", "http://t.dianping.com/register"); con.setRequestMethod("GET"); if (con.getResponseCode() == 200) { InputStream inputStr = con.getInputStream(); String info = new String(StreamTool.read(inputStr), "UTF-8"); if (info.contains("抱歉，指定的主题不存在或已被删除或正在被审核")) { System.out.println("id=" + id + "帖子存在或已被删除！"); return false; } } } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return true;}

模拟发帖
代码比较简单，注意事项是找到自己的Cookie，赋给String yourCookeie

用post发送一个回帖，回帖信息在 mapData.put("message", "友情帮顶了") 中

private static final String baseRefer = "http://bbs.**.**.**/forum.php?mod=viewthread&tid=";private static final String yourCookeie = "Q8qA_2132_saltkey=**; Q8qA_2132_lastvisit=****3699;";public static void main(String[] args) { int startId = 774210; // you need change for (int i = 0; i < 100; i++) { postMessage(startId); startId++; }}public static void postMessage(int id) { if (!isExist(id)) { return; } String tmpPath = baseRefer + id; StringBuilder path = new StringBuilder(tmpPath); Map<String, String> mapData = new LinkedHashMap<String, String>(); mapData.put("mod", "post"); mapData.put("action", "reply"); mapData.put("replysubmit", "yes"); mapData.put("infloat", "yes"); mapData.put("handlekey", "fastpost"); mapData.put("inajax", "1"); mapData.put("message", "友情帮顶了"); mapData.put("formhash", "86ec5d81"); try { for (Map.Entry<String, String> mapEnt : mapData.entrySet()) { path.append("&"); path.append(mapEnt.getKey() + "="); path.append(URLEncoder.encode(mapEnt.getValue(), "UTF-8")); } URL url = new URL(path.toString()); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); con.setRequestProperty("Content-Length", String.valueOf(path.length())); con.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36"); con.setRequestProperty("Cookie", yourCookeie); con.setDoOutput(true); OutputStream outStr = con.getOutputStream(); outStr.write(path.toString().getBytes()); if (con.getResponseCode() == 200) { InputStream inputStr = con.getInputStream(); String info = new String(StreamTool.read(inputStr), "UTF-8"); System.out.println("在id=" + id + "成功发帖！"); try { Thread.sleep(20 * 1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }}

还有一个工具方法，将输入流转化为字节

class StreamTool { public static byte[] read(InputStream inputStr) throws Exception { ByteArrayOutputStream outStr = new ByteArrayOutputStream(); // TODO Auto-generated method stub byte[] buffer = new byte[1024]; int len = 0; while ((len = inputStr.read(buffer)) != -1) { outStr.write(buffer, 0, len); } inputStr.close(); return outStr.toByteArray(); }}

效果图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。