设计思路

1. 找到帖子链接的集合, “http://rs.xidian.edu.cn/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. 遍历这个集合, 对每个链接做回帖的POST请求

重难点

Note:

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

代码

代码比较简单，

注意事项是找到自己的Cookie，赋给String yourCookeie

就可以直接运行

主要就是判断帖子存不存在，这是一个get请求
然后用post发送一个回帖，回帖信息在mapData.put(“message”, “友情帮顶了”)中 硬编码为”友情帮顶了”，你可以修改

import java.io.ByteArrayOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.net.URLEncoder; 
import java.util.LinkedHashMap; 
import java.util.Map; 
 
public class Inter { 
 
    private static final String baseRefer = "http://rs.xidian.edu.cn/forum.php?mod=viewthread&tid="; 
 
    private static final String yourCookeie = "Q8qA_2132_saltkey=g1NJjJ3O; Q8qA_2132_lastvisit=1438243699; Q8qA_2132_lastcheckfeed=256730%7C1438252008; Q8qA_2132_auth=e11aEhhXpLgTYpfDK72YJZEgJHL1v70cUXXDtJ71VbU2dyuH%2BQHw3pGOJhsFxfjbVgNsvyfG1v%2BQlD0lt8kg6J%2B40W0; Q8qA_2132_st_t=256730%7C1438571068%7C51f8a322985e44f65ff1143329e6779a; Q8qA_2132_forum_lastvisit=D_106_1438571068; Q8qA_2132_myrepeat_rr=R0; Q8qA_2132_ulastactivity=d7degfMAwG5AGHshmT%2BwCq1L91znQpEa57p%2F0Vt7VHdC8DrOuGTT; Q8qA_2132_home_diymode=1; tjpctrl=1438781938176; Q8qA_2132_visitedfid=72D551D215D110D13D142D22D91D217D548; Q8qA_2132_st_p=256730%7C1438781224%7C7a73ef608dc3caf733308d63639b3bd0; Q8qA_2132_viewid=tid_773850; Q8qA_2132_smile=10D1; Q8qA_2132_sid=ZnfqQN; Q8qA_2132_lastact=1438781403%09forum.php%09ajax"; 
 
    public static void main(String[] args) { 
        int startId = 774210; // you need change 
 
        for (int i = 0; i < 100; i++) { 
            postMessage(startId); 
            startId++; 
        } 
    } 
 
    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; 
 
    } 
 
    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(); 
        } 
 
    } 
} 
 
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(); 
    } 
 
}

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效果图