统计各个应用市场本应用的下载数量是个麻烦没有效率的要求，不符合广大程序员哥们的使用习惯，我是搞android的，深知android应用市场真是繁琐，于是百度了一下，从网上找了一个jsoup来解析网页，用于方便我们应用市场下载量的统计工作。

1.为了方便封装，便于扩展，封装了一个规则类，以及规则异常

public class Rule {
    /**
     * 链接
     */
    private String url;

    /**
     * 参数集合
     */
    private String[] params;
    /**
     * 参数对应的值
     */
    private String[] values;

    /**
     * 对返回的HTML，第一次过滤所用的标签，请先设置type
     */
    private String resultTagName;

    /**
     * CLASS / ID / SELECTION 设置resultTagName的类型，默认为ID
     */
    private int type = ID;

    /**
     * GET / POST 请求的类型，默认GET
     */
    private int requestMoethod = GET;

    public final static int GET = 0;
    public final static int POST = 1;

    public final static int CLASS = 0;
    public final static int ID = 1;


    public Rule() {
    }

    public Rule(String url, String[] params, String[] values,
            String resultTagName, int type, int requestMoethod) {
        super();
        this.url = url;
        this.params = params;
        this.values = values;
        this.resultTagName = resultTagName;
        this.type = type;
        this.requestMoethod = requestMoethod;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String[] getParams() {
        return params;
    }

    public void setParams(String[] params) {
        this.params = params;
    }

    public String[] getValues() {
        return values;
    }

    public void setValues(String[] values) {
        this.values = values;
    }

    public String getResultTagName() {
        return resultTagName;
    }

    public void setResultTagName(String resultTagName) {
        this.resultTagName = resultTagName;
    }

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public int getRequestMoethod() {
        return requestMoethod;
    }

    public void setRequestMoethod(int requestMoethod) {
        this.requestMoethod = requestMoethod;
    }

}

规则异常类

public class RuleException extends RuntimeException
{

    public RuleException()
    {
        super();
        // TODO Auto-generated constructor stub
    }

    public RuleException(String message, Throwable cause)
    {
        super(message, cause);
        // TODO Auto-generated constructor stub
    }

    public RuleException(String message)
    {
        super(message);
        // TODO Auto-generated constructor stub
    }

    public RuleException(Throwable cause)
    {
        super(cause);
        // TODO Auto-generated constructor stub
    }

}

2.抓取主要类：

public class ExtractService
{
    /**
     * @param rule
     * @return
     */
    public static Element  extract(Rule rule)
    {
        validateRule(rule);
           Element result = null  ;
        try
        {
            /**
             * 解析rule
             */
          
            String url = rule.getUrl();
            String[] params = rule.getParams();
            String[] values = rule.getValues();
            String resultTagName = rule.getResultTagName();
            int type = rule.getType();
            int requestType = rule.getRequestMoethod();

            Connection conn = Jsoup.connect(url);
            // 设置查询参数

            if (params != null)
            {
                for (int i = 0; i < params.length; i++)
                {
                    conn.data(params[i], values[i]);
                }
            }

            // 设置请求类型
            Document doc = null;
            switch (requestType)
            {
            case Rule.GET:
                doc = conn.timeout(100000).get();
                break;
            case Rule.POST:
                doc = conn.timeout(100000).post();
                break;
            }

            //处理返回数据
            
            switch (type)
            {
            case Rule.CLASS:
                result = doc.getElementsByClass(resultTagName).first();
                break;
            case Rule.ID:
                result = doc.getElementById(resultTagName).firstElementSibling();
                break;
            }

        } catch (IOException e)
        {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 对传入的参数进行必要的校验
     */
    private static void validateRule(Rule rule)
    {
        String url = rule.getUrl();
        if (TextUtil.isEmpty(url))
        {
            throw new RuleException("url不能为空！");
        }
        if (!url.startsWith("http://"))
        {
            throw new RuleException("url的格式不正确！");
        }

        if (rule.getParams() != null && rule.getValues() != null)
        {
            if (rule.getParams().length != rule.getValues().length)
            {
                throw new RuleException("参数的键值对个数不匹配！");
            }
        }

    }


}

3.运行主要类，通过我们网页分析工具，获取那些网站的源码，然后得到我们想要的数值

    public static void main(String[] args) {
        Market360();
        MarketBaidu();
        MarketAnzhi();
    }

    public static void Market360() {
        Rule rule = new Rule("http://zhushou.360.cn/search/index/",
                new String[] { "kw" }, new String[] { "名医网·健康E家" }, "downNum",
                Rule.CLASS, Rule.GET);
        System.out.println("360Market:" + ExtractService.extract(rule).text());
    }

    public static void MarketBaidu() {
        Rule rule = new Rule("http://shouji.baidu.com/s", new String[] { "wd",
                "data_type", "f" }, new String[] { "名医网·健康E家", "app",
                "header_all%40input%40btn_search" }, "download-num",
                Rule.CLASS, Rule.GET);
        System.out
                .println("baiduMarket:" + ExtractService.extract(rule).text());
    }
    public static void MarketAnzhi() {
        Rule rule = new Rule("http://www.anzhi.com/pkg/f187_com.zzu.ehome.main.ehome.html",null, null, "spaceleft",
                Rule.CLASS, Rule.GET);
        System.out
                .println("AnzhiMarket:" + ExtractService.extract(rule).text());
    }

123.png