java实现豆瓣回帖机器人

最近一直帮老板写爬虫，写累了就寻思着找点乐子，碰巧平时喜欢逛豆瓣，就打算写一个自动回帖机器人，废话不多说我们进入正题:

主要用到2个开源工具：Jsoup和httpclient

Step 1:模拟登陆

public static boolean login() throws IOException{
        String captcha_id=downloadPic(login_url,"D:\\yz.png");//下载验证码图片到本地
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("请输入验证码:");
        String yan = br.readLine();
        HttpPost httppost = new HttpPost(login_url);
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("captcha-id", captcha_id));//用firebug自己找
        params.add(new BasicNameValuePair("captcha-solution", yan));//验证码
        params.add(new BasicNameValuePair("form_email", form_email));//用户名
        params.add(new BasicNameValuePair("form_password", form_password));//密码
        params.add(new BasicNameValuePair("redir", redir));//跳转地址，一般是自己主页
        params.add(new BasicNameValuePair("source", "main"));
        params.add(new BasicNameValuePair("login", "登录"));
        httppost.setEntity(new UrlEncodedFormEntity(params));
        CloseableHttpResponse response = httpclient.execute(httppost);//执行这个post

        int statuts_code=response.getStatusLine().getStatusCode();//获得服务器返回状态码

        if(statuts_code!=302){
            System.err.println("登录失败~");
            return false;
        }

        else{
            System.err.println("登录成功~");
        }
        httppost.releaseConnection();
        return true;
    }

Step 2:利用火狐浏览器的firebug插件查看发帖时post哪些参数给服务器

一般是这4个参数：ck、rv_comment、start、submit_btn

发帖代码如下：

  public static boolean startPost(String url) {//参数url即为帖子地址

        try{
           String html=getPageHtml(url);
           Pattern p=Pattern.compile("呃...你想要的东西不在这儿");
           Matcher m=p.matcher(html);
           if(m.find()){
               return false;
           }

           Pattern p3=Pattern.compile("该话题已被小组管理员设为不允许回应");
           Matcher m3=p3.matcher(html);
           if(m3.find()){
               return false;
           }

           Pattern p2=Pattern.compile("请输入上图中的单词");
           Matcher m2=p2.matcher(html);
           if(m2.find()){
               System.out.println("要输验证码了~暂停10分钟");
               Thread.sleep(600000);
               return false;
           }

        HttpPost httppost = new HttpPost(url+"add_comment#last");
        httppost.addHeader("Connection", "keep-alive");
        List<NameValuePair> params2 = new ArrayList<NameValuePair>();
        params2.add(new BasicNameValuePair("ck", "xNxg"));//这个参数很重要一定要自己用firebug查看，否则发不了贴
        params2.add(new BasicNameValuePair("rv_comment",getComment()));//getComment()是我自己写的随机返回一个评论的函数
        params2.add(new BasicNameValuePair("start", "0"));
        params2.add(new BasicNameValuePair("submit_btn", "加上去"));
        httppost.setEntity(new UrlEncodedFormEntity(params2,"utf-8"));
        CloseableHttpResponse response = httpclient.execute(httppost);
        int status_code=response.getStatusLine().getStatusCode();

        if(status_code==302){
            System.out.println("评论成功~ "+url);//评论成功
        }
        else{
            System.out.println("评论失败~ "+url);//评论失败
        }
        httppost.releaseConnection();
        Thread.sleep(1500);
        }catch(Exception e){
            return false;
        }

        return true;
   }

完整代码请查看我的GitHub:   https://github.com/wqpod2g/Douban

感谢这篇帖子的作者：http://www.cnblogs.com/lzzgym/p/3322685.html